DETERMINATION OF FRACTURE PROPERTIES IN THERMAL BARRIER COATING SYSTEMS BY NON-STANDARD BENDING TESTS
The fracture properties of plasma sprayed thermal barrier coatings have been investigated.In this work,specimens in as-sprayed condition and after thermal oxidation have been prepared.Non-standard four point and three point bending tests that can generate a single interface crack,have been conducted at room temperature and at the ambient temperature of 100°C.respectively.Examinations of fractured surfaces by scanning electron microscopy and energy disperse spectroscopy have been used to probe the failure modes.From the load-deflection curves of specimens,the fracture toughness for stable crack propagation,in terms of energy release rate,was estimated reliably from analytical considerations.
Thermal barrier coatings Four-point bending test Failure modes Fracture toughness
P.F.Zhao F.L.Shang
MOE Key Laboratory for Strength and Vibration,Department of Engineering Mechanics,Xian Jiaotong University,Xian,710049 China
国际会议
The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)
上海
英文
242-245
2011-05-22（万方平台首次上网日期，不代表论文的发表时间）