发明授权
US08226741B2 Process for preparing metal powders having low oxygen content, powders so-produced and uses thereof
有权
具有低氧含量的金属粉末的制备方法，如此制备的粉末及其用途
- 专利标题： Process for preparing metal powders having low oxygen content, powders so-produced and uses thereof
- 专利标题（中）： 具有低氧含量的金属粉末的制备方法，如此制备的粉末及其用途
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申请号： US12444263申请日： 2007-10-03
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公开(公告)号： US08226741B2公开(公告)日： 2012-07-24
- 发明人: Leonid N. Shekhter , Steven A. Miller , Leah F. Haywiser , Rong-Chein Richard Wu
- 申请人： Leonid N. Shekhter , Steven A. Miller , Leah F. Haywiser , Rong-Chein Richard Wu
- 申请人地址： US MA Newton
- 专利权人： H.C. Starck, Inc.
- 当前专利权人： H.C. Starck, Inc.
- 当前专利权人地址： US MA Newton
- 代理机构： Bingham McCutchen LLP
- 国际申请： PCT/US2007/080282 WO 20071003
- 国际公布： WO2008/042947 WO 20081004
- 主分类号： B22F1/00
- IPC分类号： B22F1/00
摘要：
The present invention is directed to a process for the preparation of a metal powder having a purity at least as high as the starting powder and having an oxygen content of 10 ppm or less comprising heating said metal powder containing oxygen in the form of an oxide, with the total oxygen content being from 50 to 3000 ppmf in an inert atmosphere at a pressure of from 1 bar to 10−7 to a temperature at which the oxide of the metal powder becomes thermodynamically unstable and removing the resulting oxygen via volatilization. The metal powder is preferably selected from the group consisting of tantalum, niobium, molybdenum, hafnium, zirconium, titanium, vanadium, rhenium and tungsten. The invention also relates to the powders produced by the process and the use of such powders in a cold spray process.
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