Effect of cristobalite formation on the delamination resistance of an oxide/Si/(SiC/SiC) environmental barrier coating system after cyclic high temperature thermal exposure

被引：51

作者：

Arai, Yutaro ^{[1
]}

Aoki, Yuto ^{[1
]}

Kagawa, Yutaka ^{[1
]}

机构：

[1] Tokyo Univ Technol, Katayanagi Adv Res Labs, 1404-1 Katakura, Hachioji, Tokyo 1920982, Japan

来源：

SCRIPTA MATERIALIA | 2017年 / 139卷

关键词：

Environmental barrier coating; Delamination toughness; Cristobalite; Cyclic thermal exposure; SiC/SiC; WATER-VAPOR; COMPOSITES;

D O I：

10.1016/j.scriptamat.2017.06.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Delamination toughness of a mullite/Si/(SiC/SiC) environmental barrier coating (EBC) system has been measured using a shear-loading test. The EBC system is initially heated to a temperature of 1470 degrees C (above the melting point of Si (1414 degrees C)), and then repeated thermal exposure is carried out at a temperature 1320 degrees C (below the melting point of Si) for 2 h/cycle. Change of the delamination toughness with heat exposure is successfully obtained using the shear-loading test. Formation of cristobalite and transformation from a alpha-beta during thermal cycling cause an increase of crack density in the Si bond coat layer and a resulting reduction in delamination toughness. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：58 / 62

页数：5

共 27 条

[1] EFFECT OF STATIC UNIAXIAL STRESS ON RAMAN SPECTRUM OF SILICON [J].

ANASTASSAKIS, E ;

PINCZUK, A ;

BURSTEIN, E ;

POLLAK, FH ;

CARDONA, M .

SOLID STATE COMMUNICATIONS, 1970, 8 (02) :133-+

[2] A simple method for measurement of shear delamination toughness in environmental barrier coatings [J].

Aoki, Yuto ;

Inoue, Junya ;

Kagawa, Yutaka ;

Igashira, Kenichiroh .

SURFACE & COATINGS TECHNOLOGY, 2017, 321 :213-218

[3] RAMAN SPECTRA OF ALPHA-CRISTOBALITE AND BETA-CRISTOBALITE [J].

BATES, JB .

JOURNAL OF CHEMICAL PHYSICS, 1972, 57 (09) :4042-+

[4]

Caradarelli F., 2000, MAT HDB, P339

[5] Elastic Modulus Evolution and Behavior of Si/Mullite/BSAS-Based Environmental Barrier Coatings Exposed to High Temperature in Water Vapor Environment [J].

Cojocaru, C. V. ;

Kruger, S. E. ;

Moreau, C. ;

Lima, R. S. .

JOURNAL OF THERMAL SPRAY TECHNOLOGY, 2011, 20 (1-2) :92-99

[6]

DiCarlo JA, 2015, CERAMIC MATRIX COMPOSITES: MATERIALS, MODELING AND TECHNOLOGY, P217

[7] Accelerated oxidation of SiCCMC's by water vapor and protection via environmental barrier coating approach [J].

Eaton, HE ;

Linsey, GD .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2002, 22 (14-15) :2741-2747

[8]

Hridenreich B., 2015, CERAMIC MATRIX COMPO, P147

[9] Lifetime Assessment for Thermal Barrier Coatings: Tests for Measuring Mixed Mode Delamination Toughness [J].

Hutchinson, Robert G. ;

Hutchinson, John W. .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2011, 94 :S85-S95

[10]

Kagawa Y, 2017, J GAS TURBINE UNPUB

← 1 2 3 →