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Metal composite powder and method for producing same
US10376962B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10376962-B2 |
| Application number | US-201615332086-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 24, 2016 |
| Priority date | Oct 26, 2015 |
| Publication date | Aug 13, 2019 |
| Grant date | Aug 13, 2019 |
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- Title
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Abstract
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After preparing a silver-coated copper powder wherein the surface of a copper powder having an average particle diameter of 0.1 to 100 μm is coated with silver, the silver-coated copper powder is sprayed into the tail flame region of a thermal plasma to cause silver on the surface of the copper powder to diffuse in the grain boundaries of copper on the inside of the copper powder, and thereafter, the surface of the copper powder is coated with silver to produce a metal composite powder wherein the percentage of the area occupied by silver on a cross section of the metal composite powder is 3 to 20% and wherein the surface thereof is coated with silver.
First claim
Opening claim text (preview).
What is claimed is: 1. A metal composite powder comprising: a copper powder; and silver diffusing in grain boundaries of copper on the inside of the copper powder to one-third or more the particle diameter of the copper powder from the surface of the copper powder and coating the whole surface of the copper powder. 2. A metal composite powder as set forth in claim 1 , wherein said copper powder has an average particle diameter of 0.1 to 100 μm. 3. A metal composite powder as set forth in claim 1 , wherein the content of silver with respect to said metal composite powder is not less than 5% by weight. 4. A metal composite powder as set forth in claim 1 , wherein the percentage of an area occupied by silver on a cross section of said metal composite powder is 3 to 20%. 5. A metal composite powder comprising: a copper powder; and silver diffusing in the whole grain boundaries of copper on the inside of the copper powder and coating the whole surface of the copper powder. 6. A metal composite powder as set forth in claim 5 , wherein said copper powder has an average particle diameter of 0.1 to 100 μm. 7. A metal composite powder as set forth in claim 5 , wherein the content of silver with respect to said metal composite powder is not less than 5% by weight. 8. A metal composite powder as set forth in claim 5 , wherein the percentage of an area occupied by silver on a cross section of said metal composite powder is 3 to 20%.
Assignees
Inventors
Classifications
Thermal or thermo-mechanical treatment · CPC title
Metallic powder characterised by the size or surface area of the particles · CPC title
Spherical particles · CPC title
Metallic particles coated with metal · CPC title
Use of plasma · CPC title
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- What does patent US10376962B2 cover?
- After preparing a silver-coated copper powder wherein the surface of a copper powder having an average particle diameter of 0.1 to 100 μm is coated with silver, the silver-coated copper powder is sprayed into the tail flame region of a thermal plasma to cause silver on the surface of the copper powder to diffuse in the grain boundaries of copper on the inside of the copper powder, and thereafte…
- Who is the assignee on this patent?
- Dowa Electronics Materials Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C9/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 13 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).