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.
莫培程, 吴一, 于文霖, 王吉林, 邹正光, 钟生林, 王鹏. cBN-Ti-Al-Si原位合成PcBN复合材料及其力学性能[J]. 《材料导报》期刊社, 2018, 32(14): 2355-2359.
MO Peicheng, WU Yi, YU Wenlin, WANG Jilin, ZOU Zhengguang, ZHONG Shenglin, WANG Peng. In Situ Synthesis of PcBN Composites by cBN-Ti-Al-Si and Their Mechanical Property. Materials Reports, 2018, 32(14): 2355-2359.
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2018, Vol. 32 
