The effect of oxidation pre-treatment on the cyclic life of EB-PVD thermal barrier coatings with platinum-aluminide bond coats

被引：60

作者：

Tolpygo, V ^{[1
]}

Clarke, DR ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Coll Engn, Dept Mat, Santa Barbara, CA 93106 USA

来源：

SURFACE & COATINGS TECHNOLOGY | 2005年 / 200卷 / 5-6期

关键词：

TBC; bond coat; oxidation; platinum-aluminide;

D O I：

10.1016/j.surfcoat.2005.07.088

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A simple method of improving the durability of EB-PVD thermal barrier coatings (TBC) based on pre-oxidation of the bond coat is described. The method produces a twofold increase in TBC cyclic life and is effective in postponing the two major types of the oxidation-induced failure typical of TBC systems with platinum-aluminide bond coats: the gradual growth of separations between the TBC and the thermally gown alumina scale (TGO), and spontaneous failure by spallation. The stable alpha-alumina scale, formed on the bond coat surface prior to TBC deposition, is less susceptible to separation along the TBC-TGO interface and also exhibits a lower growth rate in comparison with the TGO that develops on a similar bond coat without pre-oxidation. Based on these and related observations, some key principles and requirements of the oxidation pre-treatment as well as the origin of its beneficial effect are discussed. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1276 / 1281

页数：6

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