发明名称 |
Improved platinum group silicide modified aluminide coating process and products |
摘要 |
<p>Process for producing novel coated nickel and/or cobalt superalloy bodies having increased resistance to oxidation, corrosion and thermal fatigue at high temperatures. The process comprises applying a thin layer of a platinum-group metal, siliciding and heating to an elevated temperature to diffuse and integrate the silicided platinum-group metal into the surface of the superalloy body. Then the superalloy body is exposed to a diffusion powder composition containing sources of aluminum or aluminum/chromium metals and heated in a hydrogen or inert gas atmosphere to an elevated temperature to codeposit and diffuse aluminum or aluminum and chromium into the silicided platinum-group metal-treated surface. Finally, the superalloy body is heated to its solvus temperature to form a ductile surface having an outer zone comprising a platinum-group metal aluminide, optionally ductilized by the solutioning therein of beta chromium. An inner stabilizing zone of silicon-rich phases is formed during said diffusion processes.</p> |
申请公布号 |
EP0654542(B1) |
申请公布日期 |
1999.03.31 |
申请号 |
EP19940107056 |
申请日期 |
1994.05.05 |
申请人 |
WALBAR INC |
发明人 |
ROSE, BERNARD R.;LAVERY, PATRICK R. |
分类号 |
C23C10/02;C23C10/58;C23C10/60;(IPC1-7):C23C10/00;C23C10/48;C23C10/52 |
主分类号 |
C23C10/02 |
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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