Mechanical properties of SiC-NbB2 eutectic composites by in situ spark plasma sintering

被引：22
作者：
Demirskyi, Dmytro [1 ]
Vasylkiv, Oleg [1 ,2 ]
机构：
[1] Nanyang Technol Univ, 50 Nanyang Ave, Singapore 639798, Singapore
[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 16期
关键词：
Spark plasma sintering; UHTC; Hardness; Strength; SiC-NbB2; composites; SILICON-CARBIDE; GRAIN-GROWTH; CERAMIC COMPOSITES; STRENGTH; CONSOLIDATION; DIBORIDE; FABRICATION; TOUGHNESS; OXIDATION; FRACTURE;
D O I：
10.1016/j.ceramint.2016.09.110
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：
The in situ synthesis/consolidation of SiC-NbB2 eutectic composites by spark plasma sintering (SPS) is reported. The SPS processing resulted in composites with eutectic structure and hardness of 25-31 GPa. Screening of experimental data suggested that eutectic composition in this system is 37-39 vol% NbB2. The temperature dependence of the flexural strength of the SiC-NbB2 system has been reported for the first time. Ceramic composites with eutectic structure exhibited an unchanged strength of 610 +/- 25 MPa at room temperature and at 1600 degrees C. Further increase in testing temperature, i.e. up to 1900 degrees C, was accompanied by a slight decrease in strength. Such behavior was attributed to increased contribution of the plastic deformation to the fracture process.
引用
收藏
页码：19372 / 19385
页数：14
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