Heat treatment of a platinum-gallium alloy for jewelry
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United States of America Patent
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Dec 8, 1998
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N/A
app pub date -
Nov 22, 1996
filing date -
Nov 22, 1996
priority date (Note) -
Expired
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Abstract
A platinum alloy containing 1 to 9 percent gallium and minor amounts of property enhancing additives, eg. up to 3% Pd. This alloy can be heat-treated to a Vickers hardness that is increased by at least over 25% beyond its initial, untreated value and typically to at least over 300 HV. The heat-treatment process includes the steps of solution-treating the alloy, followed by quenching and a hardening heat-treatment to achieve the desired hardness and strength. The alloy is useful as a component of jewelry, art objects or related articles.
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