| 标题 |
 Fracture toughness and crack morphologies in eroded WC–Co–Cr thermally sprayed coatings 腐蚀WC-Co-Cr热喷涂层的断裂韧性和裂纹形貌
相关领域
材料科学
断裂韧性
缩进
复合材料
热喷涂
涂层
碳化钨
断裂力学
韧性
冶金
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EL Cantera, BG Mellor Materials Letters, 1998•Elsevier The fracture toughness of two thermally sprayed tungsten carbide/cobalt–chromium coatings of nominally identically composition, 86WC–10Co–4Cr, one produced by the Detonation Gun (D-Gun) process and one by the High Velocity Oxy-fuel (HVOF) process, has been determined by the indentation method. Indentation testing revealed that both coatings exhibited anisotropic crack propagation and hence, fracture toughness, crack propagation being much easier parallel to the coating/substrate interface than transverse to it. The sample produced by the D-Gun process had a lower fracture toughness, and greater range of fracture toughness values, both parallel and transverse to the coating/substrate interface, than the HVOF coating reflecting the greater microstructural inhomogeneity of this coating. ...... |
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