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高性碳化物 (MoNbTaTiV) 的微观结构,机械和tribological特性C

Shubo Zhang¹, Falian Qin¹, Maoyuan Gong¹

¹College of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.

Materials (Basel, Switzerland)

|June 10, 2023

概括

高碳化物 (HECs) 是使用火花等离子烧结合成的. 这些先进的材料具有出色的密度和耐磨性,其机制因成分而异.

科学领域:

材料科学材料科学材料科学
陶工程陶工程陶工程
部落学 (tribology) 是一个学科.

背景情况:

高碳化物 (HEC) 是具有独特特性的先进材料.
火花等离子烧结 (SPS) 是巩固陶材料的有效方法.
了解HECs的微观结构与属性关系对于它们的应用至关重要.

研究的目的:

为了合成和描述新型的高碳化物陶.
为了研究烧结温度和SiC添加对HEC特性的影响.
评估开发的HECs的机械和tribological性能.

主要方法:

(NbTaTiV) C4 (HEC4), (MoNbTaTiV) C5 (HEC5) 和 (MoNbTaTiV) C5-SiC (HEC5S) 通过在1900-2100°C的火花等离子烧结 (SPS) 进行合成.
使用诸如X射线衍射和密度测量等技术进行微结构分析.
机械测试,包括硬度和耐磨性评估.
在特定的条件下进行 Tribological 测试以确定磨损机制.

主要成果:

实现了密集 (MoNbTaTiV) C5,面部为中心的立方体结构和>95.6%的密度.
较高的烧结温度促进了密集,谷物生长和元素扩散.
添加SiC增强了密度,但降低了谷物边界强度.
HEC4的特定磨损率为~10−5 mm3/N·m (磨损),而HEC5和HEC5S则显示较低的磨损率 (~10−7到10−6 mm3/N·m),主要是氧化磨损.

结论:

火花等离子烧结是有效的生产密集的高碳化物.
烧结温度和SiC含量显著影响HEC微观结构和特性.
与HEC4相比,HEC5和HEC5S具有更高的耐磨性,而氧化磨损是前者的主要机制.
这些发现凸显了HEC在要求高耐磨性应用中的潜力.

关键词:

摩擦和磨损性质的摩擦和磨损性能.具有高的碳化物.多相陶是多相的陶.

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