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金属元素对SPS制备的超细化碳酸盐微观结构和机械性能的影响

Hao Jiang¹, Siyuan Fu¹, Zichang Zhang¹

¹College of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450001, China.

Molecules (Basel, Switzerland)

|April 13, 2024

概括

使用火花等离子烧结 (SPS) 和V,Cr添加剂实现了具有优异机械性能的超细化碳化物. 这些元素形成了一层抑制谷物生长的层,从而产生增强的碳化物 (WC) 材料.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
机械工程机械工程

背景情况:

精密加工需要具有特殊机械性能的先进材料.
基于碳化 (WC) 的化碳化物对于苛刻的工业应用至关重要.
达到超细粒度是提高材料性能的关键.

研究的目的:

制备基于超细碳化物 (WC) 的化碳化物,具有改进的机械性能.
研究 (V) 和 (Cr) 添加剂对WC微观结构和特性的影响.
探索火花等离子烧结 (SPS) 作为生产先进化碳化物的一种方法.

主要方法:

使用WC,Co,V和Cr进行了火花等离子烧结 (SPS).
系统地研究了V和Cr添加剂对微观结构和机械性能的影响.
为表现最佳的样品确定了最佳的烧结条件 (1350°C,6分钟,25MPa).

主要成果:

最佳组合 (91.6WC-1.2V-1.2Cr-6Co) 显示出出色的机械性能:硬度 (H) 为2322.9和断裂性 (K) 为8.7MPa·m1/2.
一个均的微观结构,具有超细的WC粒 (约. 300 nm) 的距离已经实现.
和形成了一个 (W,V,Cr) Cx分离层,有效地抑制了WC粒的生长.

结论:

SPS和V,Cr添加剂的组合为生产超细化碳化物提供了有效的途径.
这种方法可以产生具有优越硬度和破裂性的材料,用于精密加工.
分离层在控制粒径和提高机械性能方面发挥着至关重要的作用.

关键词:

硬质化碳化物化机械性能机械性能机械性能金属元素中的金属元素.微观结构的微观结构在火花等离子体烧结过程中,火花等离子体烧结.

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