The multi-component phase diagrams, microstructure and correlated mechanical properties of recently developed NbC-Ni based cermets are described, allowing to elucidate the correlations between composition, microstructure and mechanical properties, and address some potential applications. The influence of the carbon content, binder content, and secondary carbide additions on the microstructure and mechanical properties of NbC-based cermets are presented in detail. The reported materials focus on NbC-Ni matrix grades with 6–20 wt% Ni binder and 4–20 wt% (VC, Mo2C, WC, TiC, and/or Ti(CxNy)) additions densified by liquid phase sintering in vacuum. The results revealed that the NbC grain growth was significantly limited by some combinations of carbide or carbonitride additions, strongly influencing the mechanical properties. The NbC-based cermets offer mechanical properties that would allow them to partially replace WC-Co and Ti(C,N)-Ni in some specific wear resistant applications.

中文翻译：

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NbC-Ni 基金属陶瓷：相图、微观结构和机械性能


描述了最近开发的 NbC-Ni 基金属陶瓷的多组分相图、微观结构和相关的机械性能，从而阐明成分、微观结构和机械性能之间的相关性，并解决一些潜在的应用。详细介绍了碳含量、粘合剂含量和再生碳化物添加量对 NbC 基金属陶瓷的微观结构和机械性能的影响。报道的材料集中在 NbC-Ni 基体等级上，其中添加了 6-20 wt% 的 Ni 粘合剂和 4-20 wt%（VC、Mo2C、WC、TiC 和/或 Ti（CxNy）），通过在真空中通过液相烧结致密。结果表明，碳化物或碳氮化物添加的某些组合显着限制了 NbC 晶粒的生长，从而强烈影响了机械性能。基于 NbC 的金属陶瓷具有机械性能，使其能够在某些特定的耐磨应用中部分替代 WC-Co 和 Ti（C，N）-Ni。