STRENGTH AND TOUGHNESS MEASUREMENT OF THIN BRITTLE COATINGS ON SUBSTRATES .2. EXPERIMENTAL-DETERMINATION

被引：13

作者：

SELVERIAN, JH

ONEIL, D

机构：

[1] Sylvania, Salem, MA 01970

来源：

THIN SOLID FILMS | 1993年 / 235卷 / 1-2期

关键词：

D O I：

10.1016/0040-6090(93)90255-N

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A method is demonstrated to measure the ultimate tensile strength, fracture toughness, Weibull modulus and surface energy of micron-sized ceramic coatings on substrates. The properties of chemically vapor-deposited coatings of Al2O3, Al2O3 + ZrO2 and TiN were measured on SiC, Si3N4 and WC-6Co substrates. The fracture stresses of these coatings are 190-2200 MPa, the fracture toughnesses are 0.4-3.8 MPa m1/2, the Weibull moduli are 10-29, and the surface energies are 0.3-13 J m-2. This work has shown that the tensile strength of thin brittle coatings can be significantly higher than bulk values and the fracture toughness of a coating can be significantly lower than bulk values.

引用

页码：129 / 136

页数：8

共 12 条

[1]

CHERMANT JL, 1978, FRACTURE MECH CERAMI, V4, P891

[2]

Davidge R, 1980, MECH BEHAV CERAMICS, P138

[3] INVESTIGATIONS ON MECHANICAL-BEHAVIOR OF BRITTLE WEAR-RESISTANT COATINGS .1. EXPERIMENTAL RESULTS [J].