Acoustic emission studies on thermal spray materials

被引：22

作者：

Lin, CK

Berndt, CC ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Mat Sci & Engn, Ctr Thermal Spray Res, Stony Brook, NY 11794 USA

[2] Natl Taiwan Ocean Univ, Inst Mat Engn, Chilung 202, Taiwan

来源：

SURFACE & COATINGS TECHNOLOGY | 1998年 / 102卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

acoustic emission; cracking mechanisms; statistical analysis; energy distribution; coatings;

D O I：

10.1016/S0257-8972(97)00531-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Acoustic emission (AE) has been used to assess the integrity of ceramic coatings. The early studies enabled cracking mechanisms to be qualitatively assessed so that comparative studies of coating behavior could be formulated. The present work examines a quantitative assessment of crack populations and crack sizes so that more detailed analyses of "crack density functions" can evolve for mechanistic studies of thermal spray materials. Coatings and solid deposits of thermally sprayed ceramic have been tested with the stress oriented in directions perpendicular and parallel to the spray direction. It has been determined that macrocracking with catastrophic failure occurs in the perpendicular orientation; whereas several distinct crack populations, consisting of micro-and macrocracking events, are observed for the parallel orientation. (C) 1998 Elsevier Science S.A.

引用

页码：1 / 7

页数：7

共 13 条

[1]

FAILURE PROCESSES WITHIN CERAMIC COATINGS AT HIGH-TEMPERATURES [J].