Palladium based powder-metal alloys and method for making same
First Claim
1. An alloy composition of matter comprising:
- at least one noble metal selected from the group consisting of gold, palladium, silver and copper; and
an amount of between about 0.20 weight percent and about 0.80 weight percent of at least one metalloid selected from the group of metalloids consisting of boron, phosphorous, silicon and lithium.
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Abstract
The subject of this invention is the development of new alloys along with new processing approaches for the utilization of the alloys. A particular class of alloys comprises at least one noble metal selected from the group comprising gold, palladium, silver and copper and an amount of between about 0.20 weight percent and about 0.80 weight percent of at least one metalloid selected from the group of metalloids consisting of boron, phosphorous, silicon and lithium. Rapid solidification technology in powder fabrication and the addition of metalloids have been combined to produce a new class of palladium based alloys. The metalloid additions greatly increase the hardness, enhance the fine grain structure and aid sintering densification. Net-shape forming is a benefit derived from the characteristics of the new alloys.
21 Citations
6 Claims
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1. An alloy composition of matter comprising:
- at least one noble metal selected from the group consisting of gold, palladium, silver and copper; and
an amount of between about 0.20 weight percent and about 0.80 weight percent of at least one metalloid selected from the group of metalloids consisting of boron, phosphorous, silicon and lithium. - View Dependent Claims (5, 6)
- at least one noble metal selected from the group consisting of gold, palladium, silver and copper; and
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2. A noble metal alloy comprising:
- an amount of between about 5.0 weight percent and about 60.0 weight percent palladium;
an amount of between about 5.0 weight percent and about 60.0 weight percent silver;
an amount of between about 5.0 weight percent and about 60.0 weight percent copper;
an amount of between about 0.05 weight percent and about 0.80 weight percent boron; and
an amount of between about 0.05 weight percent and about 0.80 weight percent phosphorous.
- an amount of between about 5.0 weight percent and about 60.0 weight percent palladium;
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3. A noble metal alloy comprising:
- not less than 20.0 weight percent palladium;
not less than 20.0 weight percent silver;
not less than 20.0 weight percent copper;
not less than 0.20 weight percent boron; and
not less than 0.20 weight percent phosphorous.
- not less than 20.0 weight percent palladium;
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4. A noble metal alloy comprising:
- between about 30.0 and about 40.0 weight percent palladium;
between about 30.0 and about 40.0 weight percent silver;
between about 30.0 and about 40.0 weight percent copper;
between about 0.25 and about 0.50 weight percent boron; and
between about 0.25 and about 0.50 weight percent phosphorous.
- between about 30.0 and about 40.0 weight percent palladium;
Specification