Hot-pressing and characterization of TiB2-SiC composites with different amounts of BN additive

被引：8
作者：
Yang, Xiaowei [1 ]
Chen, Jian [1 ]
Xing, Rong [1 ]
Babapoor, Aziz [2 ]
机构：
[1] Yancheng Teachers Univ, Coll Appl Chem & Environm Engn, Inst New Energy Chem Storage & Power Source, Yancheng 224007, Jiangsu, Peoples R China
[2] Univ Mohaghegh Ardabili, Dept Chem Engn, Ardebil, Iran
来源：
CERAMICS INTERNATIONAL | 2021年 / 47卷 / 12期
基金：
中国国家自然科学基金;
关键词：
TiB2; SiC; hBN; Microstructure; Hot-pressing; MICROSTRUCTURAL CHARACTERIZATION; ZRB2-BASED COMPOSITES; MECHANICAL-PROPERTIES; SPARK; CERAMICS; DENSIFICATION; GRAPHENE; TIN; NANOCOMPOSITES; GRAPHITE;
D O I：
10.1016/j.ceramint.2021.02.236
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：
This research aimed to study the influence of different amounts of hBN additive on the mechanical properties and microstructure of TiB2-15 vol% SiC samples. All ceramics, containing 0, 3.5, and 7 vol% hBN, were sintered at 2000 degrees C using a hot-pressing route and reached their near full densities. Thanks to two different chemical reactions among the SiC reinforcement and the TiB2 surface oxides (B2O3 and TiO2), the in-situ phases of SiO2 and TiC were generated over the sintering process. The intergranular mode was identified as the predominant fracture type in all three composite samples. The hBN additive could contribute to grain refining of composites so that the sample containing 7 vol% hBN reached the finest microstructure. Finally, the highest Vickers hardness of 25.4 HV0.5 kg and flexural strength of 776 MPa were attained for the TiB2-SiC and TiB2-SiC-7 vol% hBN samples, respectively.
引用
收藏
页码：16652 / 16660
页数：9
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