Special Metals Corporation

Steven H Reichman

Kamal Asgar

William J Boesch

Richard W Fountain

Don M Weaver

A silver-tin-copper-palladium alloy containing from 30 to 70% silver, 15 to 37% tin, at least 13% copper and from 0.05 to 0.95% palladium; and an amalgam thereof.

Silver-tin-copper-palladium alloy and amalgam thereof

A process for producing a shape memory effect alloy having a desired transition temperature. The process includes the steps of: providing at least one prealloyed powder of a shape memory effect alloy having a chemistry similar to that of the to be produced alloy and a transition temperature below the desired transition temperature of the to be produced alloy; providing at least one other prealloyed powder of a shape memory effect alloy having a chemistry similar to that of the to be produced alloy and a transition temperature in excess of the desired transition temperature of the to be produced alloy; blending said prealloyed powders; consolidating said blended powders; and thermally diffusing said consolidated powders so as to provide a substantially homogeneous alloy of the desired transition temperature.

Process for producing a shape memory effect alloy having a desired

A process for making a composite integral turbine wheel and the like, consisting of a plurality of blade elements of an airfoil shape connected at their inner ends to the periphery of a sintered rotor or hub and metallurgically bonded thereto. In accordance with the practice of the process, a plurality of identical blade elements in a final machined condition are inserted in a mold at accurate circumferentially-spaced intervals therearound and are disposed such that the inner root sections thereof extend inwardly of a mold cavity defining the rotor profile. The mold cavity is filled with metal powder composed of a high-strength, temperature-resistant alloy, and sintered into a coherent mass in a manner to effect a metallurgical bonding of the sintered rotor section to the individual blade elements. The resultant integral assembly is thereafter isostatically pressed at an elevated temperature for a period of time to effect a further densification of the sintered rotor section to a density approaching 100 percent theoretical density.

Composite turbine wheel and process for making same

An improved metal powder blend and improved dental amalgams produced therefrom comprising a mechanical mixture containing controlled proportions of an amalgamatable silver-base alloy powder and a substantially non-amalgamatable eutectic alloy powder containing a controlled quantity of tin which upon trituration with mercury forms a substantially continuous matrix having dispersed therethrough discrete phases of the non-amalgamatable powder particles which impart improved mechanical properties to the resultant dental restoration.

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Ann Arbor, MI, United States of America

Steven H Reichman