Fracture behavior characteristic of ceramic reinforced metal-base coatings |
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| Authors: | Chong Ma Hongyang Jing Lianyong Xu |
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| Institution: | 1. School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China;Technical Center of Tianjin Electric Power Corp,Tianjin 300040,China
2. School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China;Tianjin Key Laboratory ofAdvanced Joining Technology,Tianjin 300072,China |
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| Abstract: | The fracture behavior of a ceramic reinforced metal-base coating prepared by high velocity arc spraying (HVAS)technology in three-point bending test was studied.Moreover,finite element analysis(FEA)was adopted to analyze the stress distribution in the crack front.It can be found that the crack norrnal to the interface in the coatings occurred at the location where a fixed moment of force was reached.So the critical moment can be taken as thecoating cracking criterion,which was confirmed by FEA results.In addition,the stress levels at three different locations where cracks occurred near the interface are almost the same.The results will provide reference for the design of coatings and the structure integrity evaluation of coating/substrate systems. |
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| Keywords: | coatings interface fracture behavior finite element analysis |
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