Fracture Behavior Characteristic of Ceramic Reinforced Metal-Base Coatings

• Published in: Transactions of Tianjin University Vol. 15; no. 1; pp. 50 - 55
• Main Author: 马崇 荆洪阳 徐连勇
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 01.02.2009; Tianjin Key Laboratory ofAdvanced Joining Technology,Tianjin 300072,China; Technical Center of Tianjin Electric Power Corp,Tianjin 300040,China%School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China; School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China
• Subjects: Engineering; FEA; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Science; 塑木合成材料; 有限元分析; 粉末涂料; fracture behavior; coatings; interface; finite element analysis
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-009-0010-9

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.