Abstract: An impervious corrosion resistance nickel-chromium coating on a metallic substrate, such as an iron-containing alloy substrate that protects the substrate from a corrosive media and the process for producing the coating on the substrate.

Abstract: A thermal spray powder feed coating composition composed of stabilized zirconia mixed with zircon and a selected oxide, such as yttria, to form a refractory oxide coating ideally suited for hearth rolls for annealing steel Process for producing the coating and the coated article so produced is also disclosed.

Abstract: An aqueous stripping solution and method for selectively removing a titanium compound from a base metal. The aqueous solution contains a source of hydrogen peroxide, an alkali source of hydroxyl ions and an acid with the components in a concentration such that the pH of the solution is above 8.

Abstract: A process for producing a crack-free coating of pyrolytic boron nitride on a carbon structure in which the coating is formed in a controlled atmosphere containing vapors of ammonia and gaseous boron halide within a temperature range of between 1500.degree. C. to 1700.degree. C.

Abstract: A wear and erosion resistant coating for substrates which comprises a substoichiometric zirconium nitride coating having a nitrogen content in the zirconium nitride coating from 41 to 48 atomic weight percent.

Abstract: A water-cooled roll for cooling steel sheets is spray-coated on the surface that comes in contact with the steel sheets with a cermet composed of a metal oxide having a higher hardness and lower thermal conductivity than metals and a metal matrix of Ni- or Co-base heat-resisting alloy. The metal oxide is chosen from among Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3, SiO.sub.2, and ZrO.sub.2, and the metal matrix consists of an MCrAlY (M=Co or Ni). Preferably, the metal oxide is alumina and the metal matrix, CoCrAlYTa.

Abstract: The composition of the present invention is composed of finely divided solid refractory material suspended in a nonaqueous liquid slip composition. The nonaqueous liquid slip composition consists essentially of a deflocculent composed of a vinyl chloride and vinyl acetate resin dissolved in an organic solvent. The composition may be slip cast or cold formed into a low density article which is then sintered into a dense product.

Abstract: A method of resistance heating using a graphite container having a graphite body and a pyrolytic boron nitride coating in which a metal charge of predetermined weight is deposited over the coating and the container is heated by the application of a variable source of electrical power to cause the metal charge to fully evaporate in a short interval of time of less than two minutes with the heat cycle controlled to provide a cool down period in each cycle of applied power and with a new metal charge introduced upon completion of each heat cycle in a semi-continuous fashion.

Abstract: A method for engraving a series of consecutive cells in a solid surface, such as a liquid transfer surface, by impinging on the surface a pulsed laser beam in which the pulses of the laser beam are formed in a series of consecutive groups of two or more consecutive pulses and each of said groups form an individual cell in the solid surface. The article produced is also described.

Abstract: An aqueous stripping solution and method for selectively removing a titanium compound from a base metal. The aqueous solution contains a source of hydrogen peroxide, an alkali source of hydroxyl ions and an acid with the components in a concentration such that the pH of the solution is above 8.

Abstract: A duplex coating for substrates that comprises an undercoat of tungsten carbide-cobalt having a strain-to-fracture of greater than 4.3.times.10.sup.-3 inch per inch and a top coat of a ceramic material such as alumina in which the ratio of the thickness of the top coat to the undercoat is from 6:1 to 1:3.

Abstract: The invention relates to a liquid transfer article, such as a printing roll, having a laser-engraved coated surface comprised of wells adapted to receive a liquid and land areas adapted to be wiped free of any liquid prior to contacting a receiving surface so that only the liquid in the wells are transferred. The land areas of the coated surface have a density of greater than 95% theoretical and a roughness of less than 6 micro-inches R.sub.a to insure that any unwanted liquid on the land areas can be wiped clean prior to contacting a receiving surface. The invention also relates to a method for producing the liquid transfer article.

Abstract: A wear and erosion resistant coating for substrates having a non-nitrogen titanium-containing outer surface onto which a non-stoichiometric titanium nitride coating is deposited in which the nitrogen content in the titanium nitride coating is from 32.5 to 47 atomic weight percent.

Abstract: A pyrolytic boron nitride boat having a cavity suitable for use in growing and doping semi-conductor crystals such as gallium arsenide and said cavity having a roughened surface formed of substantially uniform projected no nodules, disturbances, or ridges.

Abstract: A boron nitride crucible having a closed end, an open end, an internal surface and an external surface, and wherein at least a portion of the external surface, preferably proximate the open end of the crucible, has a duplex coating comprising an undercoat of pyrolytic graphite and a top coat of pyrolytic boron nitride. A process for making the boron nitride crucible is also disclosed.

Abstract: An optical preform is prepared first by depositing soot about a glass subate rod (22) to form a boule. Then the soot boule is sintered to consolidate the material and provide a preform from which optical fiber is drawn. The boule is relatively large so that the resulting preform is capable of providing more optical fiber than those used in the past. In order to be able to sinter successfully the enlarged boule, microwave energy from a furnace (60) is coupled to the glass rod so that the sintering proceeds from the rod radially outwardly thereby allowing gases readily to escape and rendering the process highly efficient.

Abstract: An alignment sleeve (66) for holding two conically shaped portions (30--30) of plugs (24--24) each of which terminates an optical fiber (25) includes two conically shaped cavities (68, 70) communicating through a common minimal diameter plane (72). After the sleeve has been molded, a tool (100) faced with an abrasive material is inserted into each cavity of the sleeve and turned rotatably while a force is applied in a direction parallel to the longitudinal axis of the tool. This causes material to be removed from the walls defining the cavities so that when the two plugs are inserted into the cavities, the axes of the fibers will be aligned coaxially and the end faces of the fibers will have a predetermined separation. The apparatus of this invention also may be used to adjust a length measurement of plugs. This is accomplished by inserting a plug into a conically shaped cavity of a tool.

Abstract: Cordage (17) which may be used for any of the commonly marketed lengths of etractile cords comprises an array of a plurality of conductors (11--11) each insulated with a suitable plastic material. The array of conductors is enclosed in inner and outer jackets (52, 54). The inner jacket comprises a polyvinyl chloride (PVC) plastic material, for example, and has a thickness of about 0.015 inch. Covering the inner jacket is an outer jacket comprising a polyvinyl chloride plastic material having a thickness of about 0.005 inch and having a colorant constituent. The PVC composition of the inner jacket is such that it is a less expensive composition than that of the outer jacket. Enclosing the outer jacket is a layer (56) which comprises a top coating material. The top coating material provides the cordage with enhanced retractibility and prevents discoloration as well as plasticizer migration from the outer jacket.

Abstract: A terminal block (20) includes a plurality of wells each having a protector 32) disposed therein and each having a bore which communicates with a U-shaped terminal (60) so that a portion of the protector extends through the bore into engagement with a bade (66) of the terminal. Tangs (68--68) of each terminal depend downwardly. Also, the terminal block includes a plurality of terminal posts (62--62) each having a spade (69) depending therefrom. A first plastic material (70) encapsulates the base and innermost portions of each U-shaped terminal and post. Individual conductors of a pair in a cable (50) extend to a depending tang of a terminal and to a tang of an associated terminal. A strap wire interconnects the other depending tang of each U-shaped terminal to a spade of an associated terminal post. A second plastic material encapsulates the wiring and the outermost portions of the U-shaped terminals and of the spades of the terminal posts.