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| Failure Mechanism of CuNiIn Fretting Wear Coatings |
| Received:January 31, 2016 Revised:June 15, 2016 |
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| DOI：10.7643/ issn.1672-9242.2016.03.011 |
| KeyWord:hexagonal CuNiIn hexagonal CuInO2 mechanical properties first principle |
| Author | Institution |
| JIN Lei |
Beijing Aeronautical Manufacturing Technology Research Institute, Beijing , China |
| CUI Xiang-zhong |
Beijing Aeronautical Manufacturing Technology Research Institute, Beijing , China |
| MA Guo-jia |
Beijing Aeronautical Manufacturing Technology Research Institute, Beijing , China |
| ZHOU Guo-dong |
Beijing Aeronautical Manufacturing Technology Research Institute, Beijing , China |
| JIANG Chun-zhu |
Beijing Aeronautical Manufacturing Technology Research Institute, Beijing , China |
| LI Pei-zhong |
Inner Mongolia Baotou Steel Rare-earth Group Hi-Tech Co., Ltd. Baotou , China |
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| Abstract: |
| Objective In this investigation, the crystal structure, bulk modulus, shear modulus, Young modulus, Poisson ratio, toughness, thermal expansion coefficients and residual stress of CuNiIn and CuInO2 were inspected systematically, and the influencing mechanism of the material of CuInO2 in CuNiIn coatings on the mechanism performance of CuNiIn was elucidated. Methods Elastic constants were obtained with stress-strain method using the first principles density function theory. Bulk, shear and Young modulus were obtained using Voigt-Reuss-Hill methods. Results The study indicated that CuNiIn and CuInO2 were mechanically stable structures. The bulk modulus, shear modulus, Young modulus and poisson ratio for CuNiIn and CuInO2 were 118.2 GPa, 13.7 GPa, 39.6 GPa, 0.44, and 119.0 GPa, 36.8 GPa, 100.1 GPa, 0.36, respectively. The mechanical modulus of CuInO2 was higher than that of CuNiIn. The toughness of CuInO2 was poorer, the thermal expansion coeffieent was lower and the inner residual stress of CuInO2 was higher than those of CuNiIn. Conclusion Improper spray process parameters or the CuInO2 produced during the service process had negative effects on the service performance of CuNiIN fretting wear coatings. |
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