Invention Grant
- Patent Title: Ceramic thermal barrier coating for rapid thermal cycling applications
- Patent Title (中): 用于快速热循环应用的陶瓷热障涂层
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Application No.: US91077Application Date: 1993-07-13
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Publication No.: US5320909APublication Date: 1994-06-14
- Inventor: Alan J. Scharman , Thomas M. Yonushonis
- Applicant: Alan J. Scharman , Thomas M. Yonushonis
- Applicant Address: CT Hartford IN Columbus
- Assignee: United Technologies Corporation,Cummins Engine Co.
- Current Assignee: United Technologies Corporation,Cummins Engine Co.
- Current Assignee Address: CT Hartford IN Columbus
- Main IPC: C23C4/02
- IPC: C23C4/02 ; C23C28/00 ; F02B1/04 ; F02B3/06 ; F02B77/02 ; F02F3/12 ; F02F7/00 ; B32B15/20
Abstract:
A thermal barrier coating for metal articles subjected to rapid thermal cycling includes a metallic bond coat deposited on the metal article, at least one MCrAlY/ceramic layer deposited on the bond coat, and a ceramic top layer deposited on the MCrAlY/ceramic layer. The M in the MCrAlY material is Fe, Ni, Co, or a mixture of Ni and Co. The ceramic in the MCrAlY/ceramic layer is mullite or Al.sub.2 O.sub.3. The ceramic top layer includes a ceramic with a coefficient of thermal expansion less than about 5.4.times.10.sup.-6 .degree.C.sup.-1 and a thermal conductivity between about 1 J sec.sup.-1 m.sup.-1 .degree.C.sup.-1 and about 1.7 J sec.sup.-1 m.sup.-1 .degree.C.sup.-1.
Public/Granted literature
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