Abstract Micro-mechanical properties of Ti(C,N) and Zr(C,N) coatings deposited by chemical vapor deposition on a WC-Co cemented carbide substrate were examined by micro-compression testing using a nanoindenter equipped with a flat punch. Scanning Electron Microscopy, Focused Ion Beam, Electron Backscattered Diffraction and Finite Element Modeling were combined to analyze the deformation mechanisms of the carbonitride layers at room temperature. The results revealed that Ti(C,N) undergoes a pure intergranular crack propagation and grain decohesion under uniaxial compression; whereas the fracture mode of Zr(C,N) was observed to be inter/transgranular failure with unexpected plastic deformation at room temperature.

中文翻译：

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多晶Ti(C,N)和Zr(C,N)涂层微观力学性能研究

摘要 使用配备有平冲头的纳米压痕仪通过微压缩测试，研究了通过化学气相沉积在 WC-Co 硬质合金基体上沉积的 Ti(C,N) 和 Zr(C,N) 涂层的微观力学性能。结合扫描电子显微镜、聚焦离子束、电子背散射衍射和有限元建模来分析碳氮化物层在室温下的变形机制。结果表明，Ti(C,N)在单轴压缩下经历了纯晶间裂纹扩展和晶粒脱聚；而观察到 Zr(C,N) 的断裂模式是在室​​温下发生意外塑性变形的晶间/穿晶破坏。