Oscillatory pressure sintering of binderless tungsten carbide
Oscillatory pressure sintering of binderless tungsten carbide
复制标题
无粘结剂碳化钨的振荡压力烧结
DOI：
10.1016/j.ceramint.2020.07.033
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发表时间：
2020
影响因子：
5.2
通讯作者：
Xie Zhipeng
中科院分区：
文献类型：
--
作者：
Cheng Yong;Zhu Tianbin;Zhang Jie;Li Yawei;Sang Shaobai;Xie Zhipeng
采用一种新型的振荡压力烧结工艺制备了碳化钨陶瓷，研究了烧结温度对碳化钨陶瓷显微结构和力学性能的影响。发现碳化钨在高温环境下会脱碳生成W2 C。随着烧结温度的升高，碳化钨陶瓷的致密度和硬度明显提高，碳化钨晶粒长大更加明显。通过振荡压力烧结制备的样品表现出优越的上级机械性能与其他压力辅助烧结方法获得的一些公布的数据相比。研究表明，在1900 °C左右的振荡压力下，碳化钨陶瓷的最佳烧结温度为1900 °C。在此温度下制备的试样的抗弯强度、硬度和断裂韧性分别为1014 MPa、26.98GPa和5.91MPa·m1/2。
Tungsten carbide ceramics were fabricated by a novel oscillatory pressure sintering process and the influence of sintering temperature on the microstructure and mechanical properties of tungsten carbide ceramics was investigated. It was found that tungsten carbide would decarbonize to form W2C under high temperature environment. As the sintering temperature increased, the density and hardness of tungsten carbide ceramics increased apparently, and the growth of tungsten carbide grains became more obvious. The samples fabricated by oscillatory pressure sintering exhibited superior mechanical properties in comparison with some published data obtained by other pressure-assisted sintering methods. The optimum sintering temperature for tungsten carbide ceramics under oscillatory pressure was considered to be 1900 °C. Flexural strength, hardness and fracture toughness of the corresponding sample prepared at this temperature were found to be 1014 MPa, 26.98 GPa and 5.91 MPa·m1/2, respectively.