首页|Microstructure and Mechanical Properties of Multi-scale Titanium Diboride Matrix Nanocomposite Ceramic Tool Materials

Microstructure and Mechanical Properties of Multi-scale Titanium Diboride Matrix Nanocomposite Ceramic Tool Materials

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  • Trans Tech Publications Ltd
Under the liquid-phase hot-pressing technique, the multi-scale titanium diboride matrix nanocomposite ceramic tool materials were fabricated by adding both micro-scale and nano-scale TiN particles into TiB_2 with Ni and Mo as sintering aids. The effect of content of nano-scale TiN and sintering temperature on the microstructure and mechanical properties was studied. The result showed that flexural strength and fracture toughness of the composites increased first, and then decreased with an increase of the content of nano-scale TiN, while the Vickers hardness decreased with an increase of the content of nano-scale TiN. The optimal mechanical properties were flexural strength 742 MPa, fracture toughness 6.5 MPa·m~(1/2) and Vickers hardness 17GPa respectively. The intergranular and transgranular fracture mode were observed in the composites. The metal phase can cause ductility toughening and crack bridging, while crack deflection and transgranular fracture mode could be brought by micro-scale TiN and nano-scale TiN respectively.

TiB_2nanocomposite ceramicsmicrostructuremechanical properties

Hanlian Liu、Chuanzhen Huang、Shourong Xiao、Hui Wang、Ming Hong

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Center for Advanced Jet Engineering Technologies (CaJET) School of Mechanical Engineering, Shandong University, Jinan, China, 250061 Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, China, 250061

Center for Advanced Jet Engineering Technologies (CaJET) School of Mechanical Engineering, Shandong University, Jinan, China, 250061 Hisense Electric Company, Qingdao, China, 266071

2010

10.4028/www.scientific.net/KEM.431-432.523

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.431/432
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