文献类型：期刊文献

中文题名：用顶端收缩的双悬臂斜形梁试样研究等离子喷涂钼涂层的断裂韧性

英文题名：Measurement of Fracture Toughness of Plasma Sprayed Mo Coatings Using A Tapered Double Cantilever Beam Method

作者：王卫泽[1];李长久[2]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]西安交通大学材料科学与工程学院,陕西西安710049

年份：2006

卷号：30

期号：5

起止页码：615

中文期刊名：稀有金属

外文期刊名：Chinese Journal of Rare Metals

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：等离子喷涂;Mo;涂层;断裂韧性

外文关键词：plasma spray ; Mo ; coating ; fracture toughness

摘要：针对目前测量涂层断裂韧性的测量方法存在测量结果不稳定及测量程序复杂的问题,基于测量断裂韧性的曲边双悬臂梁试样(CDCB),提出用顶端收缩的双悬臂斜形梁试样(TDCB)进行测量。利用TDCB试样测量了Mo涂层的断裂韧性为106.4±14.8 J.m-2,并通过扫描电子显微镜(SEM)观察了Mo涂层的断口形貌。研究结果进一步表明用TDCB试样测量涂层的断裂韧性是可行的。Mo涂层断口呈现脆性断裂形貌。
It is difficult to obtain an accurate fracture toughness value of plasma sprayed coatings through using current measurement method. For the accurate measurement of critical strain energy release rate （GIc）, we proposed a tapered double cantilever beam （TDCB） specimen based on the contoured double cantilever beam （CDCB） specimen. The fracture toughness of plasma sprayed Mo coatings in terms of critical strain energy release rate Gic was investigated using TDCB approach. The fracture surfaces were examined using scanning electron microscope （SEM）. These results further suggest that the TDCB test is a reliable approach to measure GIc of thermal spray coatings. Plasma sprayed Mo coatings has a feature of brittle fracture.