发明名称 |
Method of controlling the oxygen content of a powder |
摘要 |
A method of reducing the oxygen content of a powder is provided. A canister is prepared with a getter, filled with the powder to be densified, sealed and evacuated. The canister is subjected to a hydrogen atmosphere at an elevated temperature whereby hydrogen diffuses into the canister through the walls thereof. The hydrogen forms moisture when reacted with the oxygen of the powder and the moisture in the reacted with the getter in order to remove oxygen from the powder to the getter. The atmosphere outside the canister is then altered to an inert atmosphere or vacuum, whereby hydrogen diffuses out of the canister. A dense body having a controlled amount of oxygen can thereafter be produced by conventional powder metallurgy techniques.
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申请公布号 |
US7931855(B2) |
申请公布日期 |
2011.04.26 |
申请号 |
US20050576746 |
申请日期 |
2005.10.06 |
申请人 |
BERGLUND ROGER;ERIKSSON HANS;SUNDSTROM JOHAN;ARVIDSSON PER |
发明人 |
BERGLUND ROGER;ERIKSSON HANS;SUNDSTROM JOHAN;ARVIDSSON PER |
分类号 |
B22F3/10;B22F;B22F1/00;B22F9/00 |
主分类号 |
B22F3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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