Abstract: A--Si containing magnesium alloy for casting with a melt thereof with a cast structure having eutectic compounds of Mg.sub.2 Si produced to improve creep strength of a cast product, preferably a Si-containing magnesium alloy of a Mg--Al--Zn system having either 0.01% to 2.0% or 6 to 12% of Zn and 6 to 12% of Al, is disclosed with the improvement in that the alloy contains 0.3 to 1.5% by weight of Si in combination with 0.005 to 0.2% of Sr added to effect refinement of the eutectic compounds to thereby reduce hot cracking and improve mechanical properties of the cast product, while the improved creep strength is preserved.

Abstract: A magnesium alloy includes 0.1 to 6.0% by weight of Al, 0.25 to 6.0% by weight of Zn, 0.1 to 4.0% by weight of rare earth element (hereinafter referred to as "R.E."), and balance of Mg and inevitable impurities. Preferably, it includes 1.0 to 3.0% by weight of Al ("a"), 0.25 to 3.0% by weight of Zn ("b") and 0.5 to 4.0% by weight of R.E.: wherein when "b" is in a range, 0.25.ltoreq."b".ltoreq.1.0, "a" and "c" satisfy a relationship, "c".ltoreq."a"+1.0; and when "b" is in a range, 1.0.ltoreq."b".ltoreq.3.0, "a," "b" and "c" satisfy a relationship, "c".ltoreq."a"+"b".ltoreq.(1/2)"c"+4.0; in order to further improve creep properties at elevated temperatures while maintaining enhanced tensile strength at room temperature and up to 100.degree. C. at least.

Abstract: Procedure for the production of a thixotropic magnesium alloy by adding a grain refiner combined with controlled, rapid solidification with subsequent heating to the two-phase area. It is preferable to use a solidification rate of >1.degree. C./s, more preferably >10.degree. C./s. It is essential that the solidification takes place at such a speed that growth of dendrites is avoided. Heating to the two-phase area is carried out rapidly in 1-30 minutes, preferably 2-5 minutes. By heating an alloy comprising 2-8 weight % Zn, 1.5-5 weight % RE, 0.2-0.8 weight Zr balanced with magnesium to a temperature in the two-phase area after casting, the structure will assume a form in which the .alpha.-phase is globular (RE=rare earth metal). The size of the spheres will be dependent on the temperature and the holding time at that temperature and they will be surrounded by a low-smelting matrix. It is preferable that the alloy has a grain size of not greater than <100 .mu.m, more preferably 50-100 .mu.m.

Abstract: A low pressure process of producing graphite fiber metal matrix composite (Gr/MMC) structures comprising brazing graphite-magnesium metal matrix composite precursors or tapes using a soldering alloy consisting essentially of magnesium and one or more of aluminum, zinc, lithium and silver.

Abstract: A magnesium alloy includes 0.1 to 6.0% by weight of Al, 1.0 to 6.0% by weight of Zn, 0.1 to 3.0% by weight of rare earth element (hereinafter referred to as "R.E."), and balance of Mg and inevitable impurities. By thusly adding Al and Zn, the castability, especially the die-castability, is improved. At the same time, the room temperature strength can be improved because the Mg-Al-Zn crystals having a reduced brittleness are dispersed uniformly in the crystal grains. Further, by adding R.E. as aforementioned, the high temperature strength is improved because the Mg-Al-Zn-R.E. crystals having a higher melting point and being less likely to melt are present in the crystal grain boundaries between the Mg-Al-Zn crystals. This magnesium alloy is excellent in castability, can be die-cast, has a higher tensile strength at room temperature, and is satisfactory in high temperature properties and creep properties. Moreover, when the magnesium alloy includes R.E. in a reduced amount of 0.1 to 2.

Abstract: An alloy based on magnesium with a load at rupture of at least 290 MPa and an elongation at rupture of at least 5%, the alloy comprising by weight, 2 to 11% aluminum, 0 to 1% manganese, 0.1 to 6% strontium, various possible impurities, and the remainder magnesium. The alloy has a structure including a matrix of fine grains of magnesium of a mean size below 3 .mu.m reinforced by intermetallic compounds dispersed homogeneously at the grain boundairies and having a mean size less than 1 .mu.m, the structure remaining unchanged if kept for more than 24 hours at a temperature up to 300.degree. C.

Abstract: A dual-phase magnesium-based alloy consisting essentially of about 7-12% lithium, about 2-6% aluminum, about 0.1-2% rare earth metal, preferably scandium, up to about 2% zinc and up to about 1% manganese. The alloy exhibits improved combinations of strength, formability and/or corrosion resistance. There is also disclosed a composite matrix whose metal phase consists essentially of the aforementioned composition.

Abstract: A complex part composed of rapidly solidified magnesium base metal alloy is produced by superplastic forming at a temperature ranging from 160.degree. C. to 275.degree. C. and at a rate ranging from 0.00021 m/sec. to 0.00001 m/sec., to improve the formability thereof and allow forming to be conducted at lower temperatures. The rapidly solidified magnesium based alloy has a composition consisting essentially of the formula Mg.sub.bal Al.sub.a Zn.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium and yttrium, "a" range from 0 to about 15 atom percent, "b" ranges from 0 to about 4 atom percent and "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. Such an alloy contains fine grain size and finely dispersed magnesium-, aluminum- rare earth intermetallic phases.

Abstract: A magnesium alloy consists essentially of the formula Mg.sub.bal Al.sub.a Zn.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, and yttrium, "a" ranges from about 0 to 15 atom percent, "b" ranges from about 0 to 4 atom percent, and "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. Second phase particles contained by the alloy are less susceptible to corrosion attack. Articles produced from the alloy have superior corrosion resistance and mechanical properties comparable to those made from commercial magnesium alloys. Such articles are suitable for application as structural members in helicopters, air frames, such as gear box housings, where good corrosion resistance in combination with low density and good strength are required.

Abstract: A rapidly solidified magnesium based alloy contains finely dispersed magnesium intermetallic phases. The alloy has the form of a filament or a powder and is especially suited for consolidation into bulk shapes having superior combination of strength, ductility and corrosion resistance.

Abstract: A pellet or bolus for administration to a ruminant by deposition in its rumeno-reticular sac where it is eroded away by rumen juices and releases active agent(s) and/or components, either continuously or in pulsed doses, comprises or incorporates a magnesium-based alloy which comprises at least 40% of magnesium, at least 30% zinc and up to 20% aluminium and, optionally, copper up to 5%, and trace elements, selected from cobalt, manganese, nickel and selenium up to 1%, the percentages being by weight. A paste can be made by heating the alloy to between its solidus and liquidus points, when it can be admixed with lead shot for weighting the bolus.In the illustrated case, the bolus comprises tubular sheath 14 which contains alloy/iron shot filling 16. However, the alloy can be used for any appropriate component of the bolus.

Abstract: A rapidly solidified magnesium based alloy contains finely dispersed magnesium intermetallic phases. The alloy has the form of a filament or a powder and is especially suited for consolidation into bulk shapes having superior mechanical properties and corrosion resistance.

Abstract: This composite material includes reinforcing carbon fibers and a matrix metal which is an alloy containing from 2% to about 8% by weight of Zn, less than about 2% by weight of Zr, less than about 1% by weight of Al, and balance substantially Mg. Thereby, the strength of the composite material is found to be substantially improved. Preferably, the content of Zn in the matrix metal may be from 3% to about 7.5% by weight, even more preferably this content of Zn in the matrix metal may be from 4.5% to about 7% by weight, and optimally it may be 6% by weight. Preferably, the content of Zr in the matrix metal is less than about 0.18% by weight, and preferably the content of Al in the matrix metal is less than about 0.6% by weight. The carbon fibers may desirably be high strength carbon fibers, i.e. carbon fibers which have low graphitization level.

Abstract: This composite material includes reinforcing hybrid fiber mixture material in a matrix of metal which is aluminum, magnesium, copper, zinc, lead, tin, or an alloy having these as principal components. The hybrid fiber mixture is a mixture of alumina fiber material and mineral fiber material. The alumina fiber material has principal components of at least about 80% by weight of Al.sub.2 O.sub.3 and remainder substantially SiO.sub.2. And the mineral fiber material has as principal components SiO.sub.2, CaO, and Al.sub.2 O.sub.3, the content of MgO being less than or equal to 10% by weight, the content of Fe.sub.2 O.sub.3 being less than or equal to 5% by weight, and the content of other inorganic substances being less than or equal to 10% by weight, with the percentage of non fibrous particles being less than or equal to 20% by weight, and with the percentage of non fibrous particles with diameters greater than 150 microns being less than or equal to 7% by weight.

Abstract: A magnesium alloy contains the following additives: A1 1-9%, Zn 0-4%, Sn 0.1-5%, Mn 0-1%. It is useful as an anode in cells operating with a salt water electrolyte, especially in batteries powering equipment for deep-sea use in which a pulsed power source is required.