Abstract: Manganese-free rare earth-transition metal AB5-type hydrogen-absorbing alloys having favorable high rate discharge characteristics, suitable for use in rechargeable batteries for electrical vehicles or hybrid electrical vehicles, include compositions of the general formula: R(CouAlvMwNi1−u−v−w)z, where R is at least one element selected from rare earth elements and yttrium (Y), M is at least one refractory metal selected from Groups IVB, VB, and VIB of the periodic table, the value of u is from 0 to about 0.25, v is from 0 to about 0.10, w is from 0 to about 0.05, and z, the ratio of R(CouAlvMwNi1−u−v−w)/R, is from about 4.70 to about 5.50. The unit cell volume is from about 87 to about 88.5 A3 at 25° C., the plateau pressure is from about 3 to about 10 apsi at 25° C., and the composition is essentially free of manganese.

Abstract: Compositional requirements and processing improvements are disclosed which improve the hydrogen embrittlement resistance and the fatigue resistance in air of nickel base single crystal articles. The compositional requirements enlarge the difference between the &ggr;′ solvus temperature and the incipient melting temperature, thus enabling the solution of &ggr;/&ggr;′ eutectic islands without causing incipient melting, while hot isostatic pressing and careful melt practice eliminate porosity and carbides, borides and nitrides, all of which act as crack initiation sites.

Abstract: The invention is directed to anti-corrosive alloys and relates in particular to an alloy containing cobalt, chromium, aluminum, yttrium, silicon, a metal from the second main group, together with the corresponding oxide, in the following proportions: chromium (Cr) 26.0-30%; aluminum (Al) 5.5-13.0%; yttrium (Y) 0.3-1.5%; silicon (Si) 1.5-4.5%; metal from the second main group (magnesium, calcium, barium, strontium) 0.1-2.0%; oxide of the corresponding metal from the second main group 0.1-2.0%; cobalt (Co) remaining percentage. Preferably, tantalum (Ta) is also added in a proportion of 0.5-4.0%, and the remaining percentage of cobalt is replaced by a remaining percentage of Me, Me being understood to mean a metal which may be nickel (Ni) or iron (Fe) or cobalt (Co) or a composition comprising Ni—Fe—Co, Ni—Fe, Ni—Co, Co—Fe.

Abstract: A high strength nickel-base alloy consisting essentially of, by weight percent, 50 to 60 nickel, 19 to 23 chromium, 18 to 22 iron, 3 to 4.4 aluminum, 0 to 0.4 titanium, 0.05 to 0.5 carbon, 0 to 0.1 cerium, 0 to 0.3 yttrium, 0.002 to 0.4 total cerium plus yttrium, 0.0005 to 0.4 zirconium, 0 to 2 niobium, 0 to 2 manganese, 0 to 1.5 silicon, 0 to 0.1 nitrogen, 0 to 0.5 calcium and magnesium, 0 to 0.1 boron and incidental impurities. The alloy forms 1 to 5 mole percent Cr7C3 after 24 hours at a temperature between 950 and 1150° C. for high temperature strength.

Abstract: The C-type nickel base alloys of the type containing significant amounts of chromium (about 16 to 25%) and molybdenum (about 12 to 18%) may be improved by adding small but critical amounts of copper (about 1 to 3.5%) which their general corrosion resistance to a wide range of both oxidizing and non-oxidizing industrial media.

Abstract: There is provided a hydrogen-absorbing alloy which contains an alloy ingot manufactured by means of a casting or sintering method or a pulverized product of the alloy ingot, and the alloy ingot being represented by the following general formula (1),(Mg.sub.1-a-b R1.sub.a M1.sub.b)Ni.sub.z (1)wherein R1 is at least one element selected from rare earth elements (including Y), M1 is at least one element selected from elements having a larger electronegativity than that of Mg (excluding the elements of R1, Cr, Mn, Fe, Co, Cu, Zn and Ni), and a, b and z are respectively a number satisfying conditions 0.1.ltoreq.a.ltoreq.0.8, 0<b.ltoreq.0.9, 1-a-b>0, and 3.ltoreq.z.ltoreq.3.8.

Abstract: High temperature alloys resistant to degradation and oxidation are provided. In accordance with preferred embodiments, alloys comprising from about 0.1 to about 50 atomic percent silicon, from about 10 to about 80 atomic percent aluminum, and at least one metal selected from the group consisting of chromium, iridium, rhenium, palladium, platinum, rhodium, ruthenium, osmium, molybdenum, tungsten, niobium and tantalum are formed. Shaped bodies and structural members comprising such alloys are also described as are methods for their fabrication.

Abstract: A new nickel-chromium alloy having high rigidity, castability, corrosion and oxidation resistance and easy workability is disclosed. The alloy comprises from about 45 to 81% nickel by weight, from about 13 to 25% chromium by weight, from about 3 to 15% tungsten by weight, and silicon and aluminum in the range from about 1 to about 6% by weight each. The new alloy has a high concentration of tungsten.

Abstract: A nickel-based alloy composition is disclosed comprising from about 0.05 to about 3 percent by weight beryllium; from about 1 to about 40 percent by weight copper; no greater than about 10 percent by weight chromium, the balance being nickel. The alloy composition may be adjusted to achieve a high, as-cast hardness alloy over a wide range of alloy component contents, or a moderate, as-cast hardness alloy useful for forming articles such as golf clubs which has relatively constant mechanical properties over a wide range of copper contents.

Abstract: An oxidation-resistant alloy for use in a high-temperature or thermal cycling environment. The alloy comprises a nickel-based matrix having a solid solution of 19-23% chromium and 3-6% aluminum. A self-healing, thermodynamically stable oxide layer is formed upon a surface of the alloy which is exposed to an oxidizing atmosphere over a range of temperatures for extended periods of time. The oxide layer protects the alloy from the oxidizing atmosphere. Additions of calcium and yttrium are made to the matrix to substantially remove or stabilize oxygen and sulfur dissolved in the molten alloy. These additions result in retention of about 0.005-0.05% of calcium and 0.01-0.06% yttrium in the cast alloy. The matrix further includes about 2-8% iron to inhibit nucleation and growth of a "gamma prime" nickel aluminum intermetallic compound which would otherwise adversely harden the alloy and cause local disturbance of a uniform distribution of aluminum. The alloy has a VHN below about 350.

Abstract: The present invention is directed to the achievement of increased gas turbine engine efficiencies through further improvements in nickel-base superalloys used to make parts and components for gas turbine engines. The present invention comprises nickel-base superalloys for producing single crystal articles having a significant increase in temperature capability, based on stress rupture strength and low and high cycle fatigue properties, over single crystal articles made from current production nickel-base superalloys. Further, because of their superior resistance to degradation by cyclic oxidation, and their resistance to hot corrosion, the superalloys of this invention possess a balance in mechanical and environmental properties which is unique and has not heretofore been obtained.

Abstract: A substrate (12) such as a superalloy turbine component is coated with a basecoat (14) of the type MCrAlY which also contains boron, where the amount of boron in the basecoat is in a concentration gradient where more boron is present near the top (16) than the bottom (20) of the basecoat (14) and boron is present in an average amount of over 0.50 wt. % throughout the basecoat cross-section (14) of the composite (10).

Abstract: A joined article includes a ceramic member, another member, and a joining layer which is formed between the ceramic member and another member and joins both the members together, wherein the joining layer is composed mainly of nickel, and the joining layer contains beryllium as an activating component.

Abstract: An alloy resistant to carburization and high temperature oxidation. The alloy consists essentially of, by weight percent, 27 to 35 chromium, 0 to 7 iron, about 3 to 4.4 aluminum, 0 to 0.4 titanium, 0.2 to 3 niobium, 0.12 to 0.5 carbon, 0 to 0.05 zirconium, 0.002 to 0.05 total cerium and yttrium, 0 to I manganese, 0 to I silicon, 0 to 0.5 calcium plus magnesium, 0 to 0.1 boron and balance nickel plus incidental impurities.

Abstract: The invention relates to an austenitic-chromium-iron alloy and its use as a material for articles with high resistance to isothermal and cyclic high temperature oxidation, high heat-resistance and high creep rupture strength at temperatures above 1100 to 1200.degree. C. The characterizing feature of the invention is that the austenitic nickel-chromium-iron alloy consists (in % by weight) of:______________________________________ 0.12 to 0.30% carbon 23 to 30% chromium 8 to 11% iron 1.8 to 2.4% aluminium 0.01 to 0.15% yttrium 0.01 to 1.0% titanium 0.01 to 1.0% niobium 0.01 to 0.20% zirconium 0.001 to 0.015% magnesium 0.001 to 0.010% calcium max 0.030% nitrogen max 0.50% silicon max 0.25% manganese max 0.020% phosphorus max 0.010% sulphur ______________________________________residue nickel, including unavoidable impurities caused by melting.

Abstract: A nickel-based alloy composition is disclosed comprising from about 0.05 to about 3 percent by weight beryllium; from about 1 to about 40 percent by weight copper; no greater than about 10 percent by weight chromium, the balance being nickel. The alloy composition may be adjusted to achieve a high, as-cast hardness alloy over a wide range of alloy component contents, or a moderate, as-cast hardness alloy useful for forming articles such as golf clubs which has relatively constant mechanical properties over a wide range of copper contents.

Abstract: An article that is used to transport a hot oxidizing gas, in particular a flue gas in a gas turbine, has a surface acted upon by the gas. This surface is formed by an alloy which has 10 to 40 wt. % chrome, 1 to 20 wt. % gallium and optionally other specific elements in a base including at least one element from the group of iron, cobalt and nickel. In the alloy the gallium replaces aluminum and/or silicon. The alloy is deposited especially as a protective layer on a superalloy substrate and optionally coated with a gas-permeable ceramic layer.

Abstract: A hydrogen storage alloy electrode for use in electrochemical hydrogen storage cells, the electrode being in the form of a negative electrode fabricated by sintering a mixture of a hydrogen storage alloy containing manganese and an alloy containing a measured amount of manganese.

Abstract: The present invention provides a hydrogen occluding alloy exhibiting high hydrogen absorption and desorption rates, and excellent initial activation in practical use, and a method of making it. There is provided a hydrogen occluding alloy having a composition comprising, by wt %, 32 to 38% of rare earth elements essentially consisting of La and/or Ce, 0.5 to 3.5% of Al, 0.5 to 10% of Mn, 0.005 to 0.5% of hydrogen, optionally 0.1 to 17% of Co, and the balance being Ni and unavoidable impurities; wherein the alloy has a microstructure characterized in that fine rare earth element hydride is dispersively distributed in a matrix having a CaCu.sub.5 -type crystal structure in a ratio of 0.5 to 20% by area. There are also provided electrodes and batteries containing such alloys, and methods of making and using such electrodes and batteries.

Abstract: A container packed with a mixture of powders classified respectively into two or at least three particle-size distribution groups which are different in average particle size, the powders comprising a hydrogen absorbing alloy singly or the combination of such an alloy and a substance not absorbing hydrogen. The mixture is at least 0.03 to not greater than 0.50 in the ratio d.sub.2 /d.sub.1 wherein d.sub.1 is the average particle size of the powder having the particle-size distribution of the largest average particle size, and d.sub.2 is the average particle size of the powder having the particle-size distribution of the second largest average particle size. The weight ratio of the powder to the total weight of the powders is greater when that powder has a particle-size distribution of larger average particle size.

Abstract: The present invention provides a car exhaust purifying filter member which is high in the capacity to collect solid and liquid contents in exhausts and which has such high heat resistance as to be capable of withstanding heat when burned for cleaning and a method of manufacturing the same. A three-dimensional mesh-like metallic porous member made from Ni--Cr--Al and having a three-dimensional framework is heated at 800-1000 .degree. C. in the atmosphere to form on its surface a densely grown fibrous alumina crystal. This member is used as a filter member. Such a filter member shows excellent collecting capacity and corrosion resistance and can withstand high temperatures. Also, it is possible to firmly carry a catalyst on the fibrous alumina crystal formed on the surface. Because of its increased surface area, it has an increased catalyst carrying capacity.

Abstract: A filler metal alloy used as a filler for welding east nickel aluminide alloys contains from about 15 to about 17 wt. % chromium, from about 4 to about 5 wt. % aluminum, equal to or less than about 1.5 wt. % molybdenum, from about 1 to about 4.5 wt. % zirconium, equal to or less than about 0.01 wt. % yttrium, equal to or less than about 0.01 wt. % boron and the balance nickel. The filler metal alloy is made by melting and casting techniques such as are melting the components of the filler metal alloy and east in copper chill molds.

Abstract: A method for producing rare earth metal-nickel hydrogen occlusive alloy ingot that contains 90 vol % or more of crystals having a crystal grain size of 1 to 50 .mu.m as measured along a short axis of the crystal and 1 to 100 .mu.m as measured along a long axis of the crystal. The method for producing the rare earth metal-nickel hydrogen occlusive alloy ingot involves melting a rare earth metal-nickel alloy and uniformly solidifying the alloy melt to have a thickness of 0.1 to 20 mm under cooling conditions of a cooling rate of 10.degree. to 1000.degree. C./sec and a sub-cooling degree of 10.degree. to 500.degree. C.

Abstract: Single crystal superalloy castings are described which have excellent oxidation resistance. The oxidation resistance is due to the presence of small but effective amounts of magnesium in the casting. Single crystal castings containing magnesium in the range of 5-200 parts per million, by weight, are described.

Abstract: A nickel-base superalloy article has a coating having a composition, in weight percent, of from about 10 to about 20 percent cobalt, from about 14 to about 25 percent chromium, from about 2 to about 12 percent aluminum, from 0 to about 0.2 percent yttrium, from about 0.001 to about 3 percent boron, from about 1 to about 10 percent silicon, balance nickel and incidental impurities. The coating is preferably applied by mixing together two powders, one with a higher solidus temperature and one with a lower solidus temperature, whose net composition is that of the coating. The powder mixture is compacted with a binder, applied to a surface of the article, and heated to a temperature above the lower solidus temperature.

Abstract: The invention relates to a heat resistant hot formable austenitic nickel alloy consisting of (in % by weight)______________________________________ carbon 0.05 to 0.15 silicon 2.5 to 3.0 manganese 0.2 to 0.5 phosphorus max 0.015 sulphur max 0.005 chromium 25 to 30 iron 20 to 27 aluminium 0.05 to 0.15 calcium 0.001 to 0.005 rare earths 0.05 to 0.15 nitrogen 0.05 to 0.20 ______________________________________residue nickel and the usual impurities due to melting.

Abstract: Single crystal superalloy castings are described which have excellent oxidation resistance. The oxidation resistance is due to the presence of small but effective amounts of magnesium in the casting. Single crystal castings containing magnesium in the range of 5-200 parts per million, by weight, are described.

Abstract: A nickel-based alloy which is excellent not only in anti-corrosion properties but also in workability is disclosed. The alloy contains 15 to 35 weight % of chromium; 6 to 24 weight % of molybdenum; wherein the sum of chromium plus molybdenum is no greater than 43 weight %; 1.1 to 8 weight % of tantalum; and balance nickel and unavoidable impurities. The alloy may optionally include no greater than 0.1 weight % of nitrogen; no greater than 0.3 weight % of magnesium, no greater than 3 weight % of manganese, no greater than 0.3 weight % of silicon, no greater than 0.1 weight % of carbon, no greater than 6 weight % of iron, no greater than 0.1 weight % of zirconium, no greater than 0.01 weight % of calcium, no greater than 1 weight % of niobium, no greater than 4 weight % of tungsten, no greater than 4 weight % of copper, no greater than 0.8 weight % of titanium, no greater than 0.8 weight % of aluminum, no greater than 5 weight % of cobalt, no greater than 0.

Abstract: A rotating blade or stationary vane of a gas turbine which is made of a nickel alloy containing Cr, Co, Mo, W, Ta, Al, Ti, C, B, Zr, and one or both of Mg and Ca. Additionally, the alloy may contain Hf, Pt, Rh and Re.

Abstract: Improved multicomponent alloys for hydrogen storage and rechargeable hydride electrode applications, and in particular for rechargeable hydride battery applications, according to the formula: A.sub.a B.sub.b Ni.sub.c D.sub.y M.sub.x R.sub.z, and the hydride thereof, where A is at least one element selected from the group consisting of Ti, Zr, Hf, Y, V, Nb, Pd, Mg, Be, and Ca; B is at least one element selected from the group consisting of Mg, Al, V, Wb, Ta, Cr, Mn, Si, C, B, and Mo; D is at least one element selected from the group consisting of W, Fe, Co, Cu, Zn, Ag, Sb and Sn; M is at least one element selected from the group consisting of Li, Na, K, Rb, Cs, P, S, Sr, and Ba; R is at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, and Yb; and where a, b, c, x, y and z are defined by: 0.10.ltoreq.a.ltoreq.0.85, 0.02.ltoreq.b.ltoreq.0.85, 0.02.ltoreq.c.ltoreq.0.85, 0.01.ltoreq.x.ltoreq.0.30, 0.ltoreq.y.ltoreq.0.25, 0.ltoreq.z.ltoreq.0.12 and a+b+c+x+y=1.00.

Abstract: A nickel base superalloy capable of being made into a single crystal article is provided with high temperature strength and improved stability by limiting the presence of an undesirable SRZ constituent. Significant to the control of formation of such undesirable constituents is the control of the amount of Re in the alloy in combination with elements such as Al, Cr, Ta, Mo, Co and W. A solution heat treatment is provided for additional control.

Abstract: A coating composition comprising an alloy having the formula RCrAlR'R" wherein R is nickel, cobalt or the like; R' is yttrium or hafnium and R" is tantalum, rhenium and/or platinum, preferably mixed with an oxide dispersion such as alumina, to provide an improved class of coatings suitable for operating in high temperature oxidizing environments.

Abstract: The improved superalloy that possesses all the characteristics required of the high-temperature structural material of high-temperature gas-cooled reactors (i.e., high-temperature strength, corrosion resistance, good producibility, good hot workability and resistance to embrittlement due to thermal aging) consists essentially of 16-28% Cr, 15-24% W (provided that Cr+W=39-44%), 0.01-0.1% Zr, 0.001-0.015% Y, 0.0005-0.01% B, up to 0.05% C, up to 0.1% Si, up to 0.1% Mn (provided that Si+Mn.ltoreq.0.1%), up to 0.1% Ti, up to 0.1% Al and up to 0.1% Nb (provided that Ti+Al.ltoreq.0.1% and Ti+Al+Nb.ltoreq.0.15%), with the balance being Ni and inevitable impurities and all percentages being on a weight basis.

Abstract: An improved nickel-based single crystal superalloy has both an extremely low sulphur content and a very low lanthanum, cerium, or lanthanum plus yttrium, or cerium plus yttrium, or content, whereby the amount while very low, is sufficient to react with the remaining available sulphur in the alloy and with sulphur from the fuel used in engine operation, such that the very thin, protective scale layer of aluminum oxide formed on the surfaces of the nickel-based alloy parts exposed to the very high temperatures incident in high efficiency turbine engines, will afford effective, long-life protection for the surfaces of these engine components, through the virtual elimination of spalling of the aluminum oxide scale during cyclic engine operations.

Abstract: A nickel-based monocrystalline superalloy suitable for turbine engine blades is obtained by adding to the alloy at least one element chosen from erbium and silicon, at a concentration by weight of 50 to 500 ppm for Er and of 500 to 1000 ppm for Si and, optionally, hafnium at a concentration by weight of 500 to 1000 ppm.

Abstract: The improved nickel-base heat-resistant alloy consists of 13.1-15.0% Cr (all percentages that follows are by weight), 8.5-10.5% Co, 1.0-3.5% Mo, 3.5-4.5% W, 3.0-5.5% Ta, 3.5-4.5% Al, 2.2-3.2% Ti, 0.06-0.12% C, 0.005-0.025% B, 0.010-0.05% Zr and 1-100 ppm of Mg and/or Ca, in the optional presence of 0-1.5% Hf and/or 0-0.5% of at least one element of Pt, Rh and Re, with the remainder being Ni and incidental impurities. The alloy has high strength and high resistance to oxidation and corrosion at elevated temperatures and, hence, is suitable for use as a constituent material for machine parts that are to be exposed to elevated temperatures.

Abstract: The invention relates to an austenitic nickel-chromium-molybdenum alloy having high resistance to general corrosion, crevice, pitting and stress crack corrosion and also intercrystalline corrosion, consisting of (in % by weight):carbon: up to 0.01%silicon: up to 0.05%manganese: up to 0.50%phosphorus: up to 0.020%sulphur: up to 0.010%chromium: 14.0 to 18.0%molybdenum: 14.0 to 18.0%cobalt: up to 2.0%tungsten: up to 0.5%calcium 0.001 to 0.010%magnesium: 0.001 to 0.020%aluminium: 0.05 to 0.30%nitrogen: up to 0.02%iron: up to 3.0%copper: up to 0.5%titanium: up to 0.01%residue nickel and usual impurities due to melting, the sum of the contents (carbon+silicon+titanium) being limited to 0.05% at the most, and the sum of the elements (calcium+magnesium+aluminium) being adjusted within the limits 0.055 to 0.33%.

Abstract: Nickel-base superalloy composition for the repair, coating or rebuilding of the surface of a superalloy substrate, such as a single crystal nickel-base superalloy, to impart thereto surface areas having improved high temperature properties such as hot corrosion resistance. The present compositions are applied by low heat-input welding processes, such as laser welding or plasma arc welding, and are formulated to provide hot corrosion resistance properties and yet to have good weldability properties. The composition contains, by weight percentages, 2-12.5 Cr, 6-17 Cr, 0.5-7 Mo, 0.5-4 Ta, 2.5-9.5 Al, 1-4 Re, 1.5-8.5 W, 0.01-2.5 Nb, 0.5-6 Ti, 0.01-0.7 Yt, 0.02-3.5 Hf, and balance Ni.

Abstract: This invention relates to a nickel-based superalloy comprising the following elements in percent by weight: from about 5.0 to about 7.0 percent rhenium, from about 1.8 to about 4.0 percent chromium, from about 1.5 to about 9.0 percent cobalt, from about 7.0 to about 10.0 percent tantalum, from about 3.5 to about 7.5 percent tungsten, from about 5.0 to about 7.0 percent aluminum, from about 0.1 to about 1.2 percent titanium, from about 0 to about 0.5 percent columbium, from about 0.25 to about 2.0 percent molybdenum, from about 0 to about 0.15 percent hafnium, and the balance nickel+incidental impurities, the superalloy having a phasial stability number N.sub.v3B less than about 2.10.

Abstract: A nickel-base alloy for a glass-contacting member used in an unenergized state and having a composition comprising by weight 25 to 40% of chromium, 10 to 45% of cobalt, optionally 0.1 to 3.0% of titanium and optionally 0.01 to 0.05% of at least one element selected from among rare earth metals with the balance consisting of nickel and unavoidable impurities.

Abstract: A superalloy component includes a substrate article of a superalloy, and a strengthenable, adherent coating on the substrate. The coating is preferably a nickel-base superalloy that is strengthened by the formation of gamma and gamma-prime phases. The coating is stronger than conventional MCrAlX coatings, and, therefore, more resistant to thermal fatigue. One operable coating has a composition, in weight percent, of about 7.5 percent cobalt, about 9 percent chromium, about 6 percent aluminum, about 1 percent titanium, about 1.5 percent molybdenum, about 4 percent tantalum, about 3 percent tungsten, about 3 percent rhenium, about 0.5 percent hafnium, about 0.3 percent yttrium, about 0.5 percent columbium, about 0.05 percent carbon, about 0.015 percent boron, about 0.015 percent zirconium, and balance nickel.

Abstract: A method of protecting and a protective coating for metal components formed of nickel or cobalt-based superalloys are disclosed. The protective coating essentially consists of the following constituents (in percent by weight):1 to 20% rhenium,15 to 50% chromium,0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%,0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and0 to 3% silicon, impurities, as well as the following elective components:0 to 5% hafnium,0 to 12% tungsten,0 to 10% manganese,0 to 15% tantalum,0 to 5% titanium,0 to 4% niobium, and0 to 2% zirconium,the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt. The protective coating is primarily suited for use with metal components in gas turbines and aircraft engines.

Abstract: A nickel base superalloy capable of being made into a single crystal article is provided with high temperature strength and improved stability by limiting the Presence of an undesirable SRZ constituent. Significant to the control of formation of such undesirable constituents is the control of the amount of Re in the alloy in combination with elements such as Al, Cr, Ta, Mo, Co and W. A solution heat treatment is provided for additional control.

Abstract: This invention relates to an active material of hydrogen storage alloy electrode. The composition of the active material has a formula: Mm Ni.sub.5-x-y-z-u A.sub.x B.sub.y C.sub.z D.sub.u ; wherein Mm is mischmetal; A=Mn, Sn, or V; B=Cr, Co, Ti, Nb, Zr, or Si; C=Al, Mg, or Ca; D=Li, Na, or K; 0.ltoreq..times..ltoreq.0.95; 0.ltoreq. y.ltoreq. 1; 0.ltoreq. z.ltoreq. 0.7; and 0.1.ltoreq. u.ltoreq. 0.9. Alternatively, the composition may be of the formula: Ti.sub.2 Ni.sub.1-u Du; wherein D=Li, Na, or K; and 0.04.ltoreq. u.ltoreq. 0.9. This active material can relieve the alkali metal ions M.sup.+ continuously in charge-discharge process of the alkali batteries, increase the concentration of MOH within the battery, take effect in protecting the cathode and the anode validly, and improve the cycle life and the discharge capacity of the battery.

Abstract: A precipitation-hardening-type Ni-base alloy exhibiting improved resistance to stress corrosion cracking in a sour gas atmosphere containing elemental sulfur at high temperatures is disclosed. The alloy consists essentially of, by weight %;______________________________________ Cr: 12-25%, Mo: over 9.0 and up to 15%, Nb: 4.0-6.0%, Fe: 5.0-25%, Ni: 45-60%, C: 0.050% or less, Si: 0.50% or less, Mn: 1.0% or less, P: 0.025% or less, S: 0.0050% or less, N: 0.050% or less, Ti: 0.46-1.0%, Al: 0-2.0%.

Abstract: An alloy exhibiting corrosion resistance in a combustion environment where V, Na, S and Cl are present comprises, in weight percent, not more than 0.05% C, 0.02-0.5% Si, 0.02-0.5% Mn, 15-35% Cr, 0.5-4% Mo, 10-40% Co, 5-15% Fe, 0.5-5% W, 0.0003-0.005% Ca and the remainder of Ni at a content of not less than 4% and unavoidable impurities, provided that Cr (%)+0.5Ni (%)+3Mo (%).gtoreq.30 (%) and Ni (%)+0.5Co (%).gtoreq.Cr (%)+Mo (%)+W (%). A composite steel tube exhibiting corrosion resistance in a combustion environment where V, Na, S and Cl are present comprises an inner tube constituted of Cr-containing boiler tube and an outer tube constituted of the alloy.

Abstract: A protective coating for metal components formed of nickel or cobalt-based superalloys essentially consists of the following constituents (in percentages by weight):1 to 20% rhenium,22 to 50% chromium,0 to 15% aluminum, the share of chromium and aluminum taken together being at least 25% and at most 53%,0.3 to 2% in total of at least one reactive element from the group consisting of the rare earths, and0 to 3% silicon,impurities, as well as the following elective components:0 to 5% hafnium,0 to 12% tungsten,0 to 10% manganese,0 to 15% tantalum,0 to 5% titanium,0 to 4% niobium, and0 to 2% zirconium,the total share of the elective components being from 0 to a maximum of 15%, and a remainder primarily being at least one of the elements iron, nickel, and cobalt.

Abstract: A nickel-based superalloy consisting essentially of, in weight percent, from about 4 to about 5 percent chromium, from about 11 to about 14 percent cobalt, from about 4 to about 8 percent tungsten, from about 6 to about 10 percent tantalum, from about 5 to about 7 percent aluminum, from about 5.5 to about 8 percent rhenium, from about 0 to about 0.50 percent hafnium, from about 0 to about 0.07 percent carbon, from 0 to about 0.01 percent boron, from 0 to about 0.030 percent yttrium, from 0 to about 6 percent ruthenium, from 0 to about 1 percent molybdenum, from 0 to about 1 percent niobium, and the balance essentially nickel. Articles made from the superalloy of the invention are especially useful when cast as single crystal airfoils for use in advanced gas turbine engines.

Abstract: The improved superalloy that possesses all the characteristics required of the high-temperature structural material of high-temperature gas-cooled reactors (i.e., high-temperature strength, corrosion resistance, good productibility, good hot workability and resistance to embrittlement due to thermal aging) consists essentially of 16-28% Cr. 15-24% W (provided that Cr+W=39-44%), 0.01-0.1% Zr, 0.001-0.015% Y, 0.0005-0.01% B, up to 0.05% C, up to 0.1% Si, up to 0.1% Mn (provided that Si+Mn.gtoreq.0.1%), up to 0.1% Ti, up to 0.1% Al and up to 0.1% Nb (provided that Ti+Al.gtoreq.0.1% and Ti+Al+Nb.gtoreq.0.15%), with the balance being Ni and inevitable impurities and all percentages being on a weight basis.

Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 4.9 Ti 2.0 Ta 4.7 Nb 2.3 Zr 0.06 V 1 C 0.05 B 0.