Synthesis of TiC-SiC hard ceramics and their mechanical properties

被引：0

作者：

Sekine T. ^{[1
]}

Nino A. ^{[2
]}

Sugawara Y. ^{[1
]}

Sugiyama S. ^{[1
]}

Taimatsu H. ^{[2
]}

机构：

[1] Akita Industrial Technology Center, 4-11 Sanuki, Araya, Akita

[2] Dept. Materials Science and Engineering, Graduate School of Engineering Science, Akita University, 1-1 Tegata-Gakuencho, Akita

来源：

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy | 2016年 / 63卷 / 10期

关键词：

Composite; Mechanical Properties; Microstructure; Silicon Carbide; Titanium Carbide;

D O I：

10.2497/jjspm.63.912

中图分类号：

学科分类号：

摘要：

TiC-SiC ceramics were sintered at 1600-1800 °C using a resistance-heated hot pressing machine. No phase except TiC and α-SiC was detected after sintering. Dense ceramics were obtained in the range of 0-70 mol% SiC at a sintering temperature of 1800 °C. The Young's moduli for dense TiC-SiC ceramics ranged from 426-457 GPa, regardless of the SiC additive amount. The addition of SiC above 10 mol% increased Vickers hardness by 2-3 GPa. The addition of SiC above 10 mol% inhibited the grain growth of TiC, and brought fine equiaxed granular structure to sintered bodies. The addition of SiC increased fracture toughness in the conditions 0-50 mol% SiC at 1800 °C, 0-20 mol% SiC at 1700 °C, and 0-10 mol% SiC at 1600 °C. The highest fracture toughness value 6.5 MPa m1/2 was obtained for the TiC-50 mol% SiC ceramic sintered at 1800 °C. The addition of SiC greatly increased thermal conductivity from 27 W m-1 K-1 for pure TiC to 98 W m-1 K1 at 70 mol% SiC.

引用

页码：912 / 917

页数：5

共 16 条

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