Thermal barrier coatings deposited by laser CVD

被引：29

作者：

Goto, T ^{[1
]}

机构：

[1] Tohoku Univ, Mat Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

SURFACE & COATINGS TECHNOLOGY | 2005年 / 198卷 / 1-3期

关键词：

laser; photolaser CVD; zirconium oxide; yttrium oxide; thermal barrier;

D O I：

10.1016/j.surfcoat.2004.10.084

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The ceramic coating is a key issue for thermal barrier coatings (TBCs) in gas turbine technology. Atmospheric plasma spray (APS) and electron-beam physical vapor deposition (EBPVD) are commonly employed in practical applications. An alternative route, chemical vapor deposition (CVD), is a candidate process for TBCs. Although CVD has been understood to be too slow to obtain thick coatings, a laser CVD process has achieved an extremely high deposition rate (660 mu m/h) for yttria-stabilized zirconia (YSZ) coatings. The high deposition rates have caused a large number of nano-pores in grains leading to a significantly smaller thermal conductivity of 0.7 W/mK. This paper briefly reviews the process for TBCs, and introduces laser CVD for thick oxide coatings. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：367 / 371

页数：5

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