Erosion resistance and toughening mechanism of AlBO and BNw whiskers modified thermal barrier coatings |
| |
| Affiliation: | 1. Institute of Surface/Interface Science and Technology, Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;2. College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
| |
| Abstract: | In order to improve the erosion resistance and toughness of thermal barrier coatings, YSZ coatings, 20 vol%-AlBOw whisker modified YSZ coatings and 20 vol%-BNw whisker modified YSZ coatings were prepared by plasma spraying. The cross-section structure, morphology, composition and phase composition of coatings and powders were analyzed by SEM, EDS and XRD. The erosion resistance of three coatings was tested by self-made erosion tester. The crack growth resistance of coatings was tested and calculated by Vickers hardness tester. The results show that the density of the coating is improved by adding AlBOw and BNw. The whisker inhibits the crack propagation through the mechanisms of crack deflection, whisker pull-out and whisker bridging. The addition of whisker improves the erosion resistance of YSZ coating by 8.17% and 13.94%, which can effectively improve the service life of thermal barrier coating. |
| |
| Keywords: | Thermal barrier coating Whisker modification Erosion resistance Fracture toughness |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
