cBN-Ti-Al-Si原位合成PcBN复合材料及其力学性能

doi:10.11896/j.issn.1005-023X.2018.14.006

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Abstract The polycrystalline cubic boron nitride (PcBN) composites were sintered for 20 min at high temperature (1 500 ℃) under high pressure (5 GPa) using cubic boron nitride, Ti, Al and Si powders as raw materials. The X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray dispersive energy dispersive spectroscopy (EDS) were performed to study the phase, microstructure and element distrubiton of the samples. Simultaneously, the porosity, relative density, flexural strength and hardness of the samples were also inveitigated. The characterization results indicated that the new phase emerged in the cBN-Ti-Al-Si system were TiB₂, AlN, TiSi₂, Ti₅Si₃ and Si₃N₄. In addition, when the Si content was 15wt%, PcBN presented the best comprehensive performance, where the porosity, relative density, hardness and bending strength were 0.21%,98.5%,34.58 GPa and 799 MPa, respectively. However, when the Si content was increased to 20wt%, the corresponding performance of PcBN will be decreased rapidly.

Key words： high temperature and high pressure PcBN binder mechanical property

Published: 31 July 2018

CLC number:

TB333

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	Articles by authors
	MO Peicheng
	WU Yi
	YU Wenlin
	WANG Jilin
	ZOU Zhengguang
	ZHONG Shenglin
	WANG Peng

Cite this article:

MO Peicheng,WU Yi,YU Wenlin, et al. In Situ Synthesis of PcBN Composites by cBN-Ti-Al-Si and Their Mechanical Property[J]. Materials Reports, 2018, 32(14): 2355-2359.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.14.006 OR http://www.mater-rep.com/EN/Y2018/V32/I14/2355

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