Abstract: The invention relates to a plain bearing alloy on a tin basis with antimony and copper, the alloy consisting of 6 to 15% by weight of antimony, 3 to 10% by weight of copper, 0.05 to 1% by weight of silver and 0.1 to 2% by weight of zinc, the remainder being tin.

Abstract: Shaped bodies which are improved in high-temperature strength, resistance to thermal shock and fatigue limit can be made of a lightweight cast material which consists mainly of aluminum and in addition contains 5 to 15% by weight magnesium silicide.

Abstract: The present invention provides a fine-grained ceramic formed body of 0.5 to mole % rare earth oxide and 0.5 to 7 mole % MgO-containing ZrO.sub.2, wherein the cubic granules thereof are coated with Mg-Al spinel particles.The present invention also provides a process for the production of such formed bodies, wherein a ZrO.sub.2 powder alloyed with rare earth oxide, which contains small amounts of Al.sub.2 O.sub.3, is pressed and sintered in the presence of MgO at a temperature of from 1400.degree. to 1600.degree. C. and optionally subsequently tempered at a temperature of from 1200.degree. to 1350.degree. C.

Abstract: In a process of producing mechanically alloyed composite powder, a mixture consisting of at least one metallic powder and at least one non-metallic powder or of a plurality of metallic powders is ground in a drum mill in which a large amount of energy is introduced into the material being ground. To obtain composite powders having reproducible properties for mechanical technology, the powders are ground in a centrifugal mill which has a cylindrical grinding drum, which rotates about its axis and revolves on an orbit about a stationary axis that is parallel to the axis of the drum. Said revolution is effected at an angular velocity that has a constant ratio to the angular velocity at which the drum rotates about its own axis.

Abstract: A ceramic body of zirconium dioxide containing, if desired, aluminum oxide, and partially stabilized with yttrium oxide and/or one or more rare earth oxides (e.g., cerium dioxide) and/or magnesium oxide and/or calcium oxide is partially stabilized with 0.5 to 5 mole-% of yttrium oxide and/or 5 to 12 mole-% of magnesium oxide and/or calcium oxide and/or cerium dioxide or one or more rare earth oxides, is 30 to 100% in the tetragonal lattice modification and has in the surface region a content of yttrium oxide, cerium dioxide, magnesium oxide, calcium oxide or rare earth oxide that is 1 to 20 mole-% higher than the average content, such that the body is coated with a thin, PSZ-like layer in a more highly stabilized tetragonal or with a layer that is predominantly in the cubic lattice form.

Abstract: A thermometric bimetallic structure of high strength at elevated temperatures of, say, 500.degree. C to 700.degree. C, comprises an active component and a passive component secured together, the active component having a coefficient of thermal expansion of about 19 .times. 10.sup.-.sup.6 .degree.C.sup.-.sup.1 to 22 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1 while the passive component has a coefficient of expansion of 3 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1 to 12 .times. 10.sup.-.sup.6 .degree. C.sup.-.sup.1. The active component, which expands to a substantially greater extent than the passive component upon heating, consists of 0.4 to 0.9% by weight carbon, 0.03 to 0.1% by weight nitrogen, 10 to 14% by weight nickel, 3 to 7% by weight manganese, 0.2 to 1% by weight niobium and/or tantalum, 0.5 to 1.5% by weight vanadium, up to 1.5% by weight molybdenum, up to 1.5% by weight tungsten, up to 3.5% by weight chromium, up to 0.

Abstract: A ceramic body of zirconium dioxide containing, if desired, aluminum oxide, nd partially stabilized with yttrium oxide and/or one or more rare earth oxides (e.g., cerium dioxide) and/or magnesium oxide and/or calcium oxide is partially stabilized with 0.5 to 5 mole-% of yttrium oxide and/or 5 to 12 mole-% of magnesium oxide and/or calcium oxide and/or cerium dioxide or one or more rare earth oxides, is 30 to 100% in the tetragonal lattice modification and has in the surface region a content of yttrium oxide, cerium dioxide, magnesium oxide, calcium oxide or rare earth oxide that is 1 to 20 mole-% higher than the average content, such that the body is coated with a thin, PSZ-like layer in a more highly stabilized tetragonal or with a layer that is predominantly in the cubic lattice form.