WB2 ceramics prepared by combination of boro/carbothermal reduction process and spark plasma sintering: Effect of C content and sintering rate

被引：2
作者：
Lin, Shiming [1 ,2 ]
Long, Ying [1 ,2 ]
Wang, Yuanxian [1 ,2 ]
Lin, Hua-Tay [1 ,2 ]
机构：
[1] Guangdong Univ Technol, State Key Lab High Performance Tools, Guangzhou 510006, Guangdong, Peoples R China
[2] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2024年 / 44卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Tungsten diboride; C content; Sintering rate; MECHANICAL-PROPERTIES; BOROTHERMAL REDUCTION; GRAPHITE ADDITION; MICROSTRUCTURE; DENSIFICATION; ZRB2; BEHAVIOR; POWDERS; CARBON;
D O I：
10.1016/j.jeurceramsoc.2024.05.069
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Tungsten diboride ceramics with a relative density higher than 90 % without addition of sintering aid can be prepared by boron/carbothermal reduction method combined with spark plasma sintering. Among the raw materials,WO3, B4C, and C, C content is of vital importance to obtain WB2 bulk samples with high density and good mechanical properties. In the present work, we investigated the effects of C content in powder synthesis, as well as SPS sintering rate on phase composition, microstructure, and Vickers hardness of WB2 bulk samples.WB2 bulk sample with a relative density as high as -94 % was obtained with the optimal raw material ratio of WO3: B4C:C=2:1.075:4.8, which was then increased to -96 % with the decrease of sintering rate from 100 degrees C/min to 50 degrees C/min. This represents the highest relative density of the pure WB2 ceramic publicly reported in the literatures.
引用
收藏
页码：7566 / 7571
页数：6
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