Fracture Behavior Characteristic of Ceramic Reinforced Metal-Base Coatings  

作　　者：马崇 荆洪阳 徐连勇 

机构地区：[1]School of Materials Science and Engineering, Tianjin University [2]Technical Center of Tianjin Electric Power Corp [3]Tianjin Key Laboratory of Advanced Joining Technology

出　　处：《Transactions of Tianjin University》2009年第1期50-55,共6页天津大学学报（英文版）

基　　金：Supported by Tianjin Natural Science Foundation(No.08JCYBJC09100);New Teacher Research Fund for the Doctoral Program of Higher Education of China (20070056096) and New Century Outstanding Talented Person Plan of China.

摘　　要：The fracture behavior of a ceramic reinforced metal-base coating prepared by high velocity arc spray-ing (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 normal 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 the coating 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.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 normal 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 the coating 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.

关 键 词：COATINGS interface fracture behavior finite element analysis 

分 类 号：O346.1[理学—固体力学]