Oxidation behavior of TiAl/TiAl-SiC gradient coatings on gamma titanium aluminides

被引：38

作者：

Gong, SK ^{[1
]}

Xu, HB ^{[1
]}

Yu, QH ^{[1
]}

Zhou, CG ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2000年 / 130卷 / 01期

关键词：

gradient coatings; oxidation behavior; TiAl; electron beam physical vapor deposition;

D O I：

10.1016/S0257-8972(00)00694-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Gradient TiAl/TiAl + SiC coatings on the gamma titanium aluminide were fabricated by using electron beam physical vapor deposition (EB-PVD) technique, and the oxidation resistance behavior was investigated. The coating surface was in the structure containing mainly TiAl and SiC identified by the X-ray diffractometer. The oxidation resistance depends on the ratio of the surfacial content of SiC to TiAl. Only 1.03 mg/cm(2) weight gain was recorded after isothermal oxidation at 1173 K in air for 200 h, and no spallation was recognized after cyclic oxidation at 1173 K in air for 100 h for the coating with the ratio of approximately 8:3 TiAl/SiC. The contribution of SiC to the improvement of the oxidation resistance can be considered as the formation of amorphous SiO2. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：128 / 132

页数：5

共 5 条

[1] MECHANISM OF ISOTHERMAL OXIDATION OF THE INTERMETALLIC TIAL AND OF TIAL ALLOYS [J].

BECKER, S ;

RAHMEL, A ;

SCHORR, M ;

SCHUTZE, M .

OXIDATION OF METALS, 1992, 38 (5-6) :425-464

[2]

Kim Y.W., 1995, ACTA METALL SIN SER, V8, P319

[3]

Lamkin M. A., 1992, Journal of the European Ceramic Society, V10, P347, DOI 10.1016/0955-2219(92)90010-B

[4]

XU D, 1994, SURF COAT TECH, V66, P486

[5] Preparation of thermal barrier coatings for gas turbine blades by EB-PVD [J].

Xu, HB ;

Gong, SK ;

Deng, L .

THIN SOLID FILMS, 1998, 334 (1-2) :98-102

← 1 →