Alloys or metallic compositions – Palladium base – Copper containing
Patent
1983-08-31
1984-05-29
Rutledge, L. Dewayne
Alloys or metallic compositions
Palladium base
Copper containing
420508, 420580, 420587, 420463, 433222, 433207, C22C 504, C22C 3002
Patent
active
044516398
ABSTRACT:
A dental alloy for use in porcelain-fused-to-metal restorations including palladium, cobalt, gallium, gold, aluminum, copper, zinc and ruthenium or rhenium. The cobalt controls the coefficient of thermal expansion of the alloy to permit the use of the alloy with commercially available porcelains having a variety of thermal coefficients. The zinc serves as a scavenger during formation and casting of the alloy. The aluminum protects the alloy from absorbing gases during torch melting and during the porcelain firing process. The ruthenium or rhenium provides grain refining for the alloy to increase its elongation, tensile strength, and thus toughness. The alloy with ruthenium or rhenium as a grain refining agent must be made in a protective environment to avoid the formation of bubbles in the procelain during the procelain firing process.
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Information Card Published by Williams Gold Company re Athenium Alloy.
Information Card Published by J. M. Ney Company re Option Alloy.
Jeneric Industries, Inc.
Kramer Barry
Rutledge L. Dewayne
Yee Debbie
LandOfFree
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