Failure Behavior of Thermal Barrier Coatings on Cylindrical Superalloy Tube Under Thermomechanical Fatigue
来源期刊：Acta Metallurgica Sinica2013年第4期
论文作者：Zhubing CHEN Zhongguang WANG Shijie ZHU
文章页码：404 - 408
摘 要：Failure behavior of thermal barrier coatings on cylindrical superalloy tube was investigated under thermomechanical fatigue（TMF）.Two types of TMF tests,i.e.in phase（IP） and out of phase（OP）,were performed in the temperature range of 450-850℃.All tests were carried out under mechanical strain control at a given period of 300 s.The bond coat NiCrA1Y was produced by high velocity oxygen fuel（HVOF）,and the top coat 7%Y2O3-ZrO2 was deposited by air plasma spraying（APS）.The testing results showed that the OP TMF life was longer than the IP TMF one under the same mechanical strain amplitude.Observations of the fractured specimens revealed that the interface damage and cracking behavior in the two phasing conditions were different.In OP loading,the top coat was cracked and detached from the bond coat while no spallation was found in the IP loading.
Zhubing CHEN1,2，Zhongguang WANG2，Shijie ZHU3
1. Shenyang Aeroengine Research Institute,Aviation Industry Corporation of China2. Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences3. Department of Intelligent Mechanical Engineering,Fukuoka Institute of Technology
摘 要：Failure behavior of thermal barrier coatings on cylindrical superalloy tube was investigated under thermomechanical fatigue（TMF）.Two types of TMF tests,i.e.in phase（IP） and out of phase（OP）,were performed in the temperature range of 450-850℃.All tests were carried out under mechanical strain control at a given period of 300 s.The bond coat NiCrA1Y was produced by high velocity oxygen fuel（HVOF）,and the top coat 7%Y2O3-ZrO2 was deposited by air plasma spraying（APS）.The testing results showed that the OP TMF life was longer than the IP TMF one under the same mechanical strain amplitude.Observations of the fractured specimens revealed that the interface damage and cracking behavior in the two phasing conditions were different.In OP loading,the top coat was cracked and detached from the bond coat while no spallation was found in the IP loading.
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