THE EFFECTS OF AIR AND SODIUM-SALTS ON THE STRENGTH OF SILICON-NITRIDE-BASED CERAMICS

被引：2

作者：

GOGOTSI, GA ^{[1
]}

GOGOTSI, YG ^{[1
]}

ZAVADA, VP ^{[1
]}

TRASKOVSKY, VV ^{[1
]}

机构：

[1] UNIV KARLSRUHE,INST KERAM MASCHINENBAU,W-7500 KARLSRUHE,GERMANY

来源：

MATERIALS AT HIGH TEMPERATURES | 1991年 / 9卷 / 04期

关键词：

SILICON NITRIDE; STRENGTH; OXIDATION; STRESS CORROSION; STRUCTURAL CERAMICS;

D O I：

10.1080/09603409.1991.11689662

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of oxidation and hot corrosion on the high-temperature strength of reaction-sintered and hot-pressed silicon-nitride-based ceramics have been investigated. A strength reduction and static-fatigue sensitivity in the temperature range 700-900-degrees-C were observed in the tests in air and in the presence of salts. Silicon-nitride-based ceramics were found to be stress-corrosion sensitive over a specified temperature interval. Sample failure at lower loads was shown to result from both corrosion-induced flaws in the ceramic's surface layer and stress-corrosion cracking. Some methods for ceramic protection against stress corrosion are proposed.

引用

页码：209 / 216

页数：8

共 19 条

[1]

[Anonymous], 1990, HDB CERAMICS COMPOSI

[2]

BILLY M, 1986, HIGH TEMP TECHNOL, V4, P131

[3]

Birks N, 1983, INTRO HIGH TEMPERATU

[4]

BOURNE WC, 1980, AM CERAM SOC BULL, V59, P443

[5]

BURKE J, 1982, SURFACE TREATMENTS I

[6]

CHARLES RJ, 1965, HIGH STRENGTH MAT, P682

[7]

EVANS AG, 1981, STRUCTURAL CERAMICS

[8]

Gogotsi G. A., 1989, Strength of Materials, V21, P918, DOI 10.1007/BF01529616

[9] STRENGTH DEGRADATION OF SI3N4-SIC-BASED CERAMICS IN SALT ENVIRONMENTS [J].

GOGOTSI, GA ;

ZAVADA, VP ;

GOGOTSI, YG .

CERAMICS INTERNATIONAL, 1986, 12 (04) :203-208

[10] STRESS-CORROSION OF SILICON-NITRIDE BASED CERAMICS [J].

GOGOTSI, GA ;

GOGOTSI, YG ;

ZAVADA, VP ;

TRASKOVSKY, VV .

CERAMICS INTERNATIONAL, 1989, 15 (05) :305-310

← 1 2 →