Cyclic oxidation and mechanical behaviour of slurry aluminide coatings for steam turbine components

被引：97
作者：
Aguero, A.
Muelas, R.
Gutierrez, M.
Van Vulpen, R.
Osgerby, S.
Banks, J. P.
机构：
[1] Inst Nacl Tecn Aeroespacial, Madrid 28850, Spain
[2] KEMA, NL-6800 ET Arnhem, Netherlands
[3] Natl Phys Lab, Mat Ctr, Teddington TW11 0LW, Middx, England
来源：
SURFACE & COATINGS TECHNOLOGY | 2007年 / 201卷 / 14期
关键词：
steam oxidation; coatings; alummide; slurry; ferritic-martensitic steels; creep; cyclic oxidation; TMF; steam power generation plant;
D O I：
10.1016/j.surfcoat.2006.11.033
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The excellent steam oxidation resistance of iron alummide coatings on ferritic steels at 650 degrees C has been demonstrated both by laboratory tests and field exposure. These coatings are formed by the application of an Al slurry followed by diffusion heat treatment at 700 degrees C for 10 h. The resulting microstructure is mostly composed of Fe2Al5 on top of a much thinner FeAl layer. This coating exhibits perpendicular cracks due to thermal expansion mismatch between coating and substrate. However, these stress relieving cracks do not seem to have an effect on the mechanical properties of the substrate. Cyclic oxidation, creep resistance and TMF testing of these coatings at 650 degrees C indicate excellent performance. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：6253 / 6260
页数：8
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