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Synthesis of TiC0.5–Al and Effect of Sintering Temperature on Mechanical Properties of PcBN Composites

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Abstract

Polycrystalline cubic boron nitride (PcBN) with excellent mechanical properties was sintered by using high activity TiC0.5 and metal aluminum as binder at high temperature and pressure. The effects of sintering temperature on phase composition, microstructure, relative density and mechanical properties of PcBN composites were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy spectrum analysis. The results show that, under the conditions of low reaction temperature of 1400°C and holding time of 10 min, excellent composite properties of PcBN sintered material were obtained. The reinforced phases such as Ti(C, N), TiB2 and AlN were stably presented in the sintered body. To be specific, the microhardness, flexural strength and fracture toughness of the sintered body first increased and then decreased with the increasing sintering temperature, as well as posessing a high fracture toughness, which were 39.74 GPa, 1217 MPa and 8.78 MPa m1/2, respectively.

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Funding

This study was supported by the National Natural Science Foundation of China (project no. 52062010).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Guilin University of Technology, 541004, Guilin, China

    Xixi Hu, Ailing Sun, Yang Liu, Shenglin Zhong, Peicheng Mo & Yi Wu

  2. Guangxi Key Laboratory of Superhard Material, China Nonferrous Metal (Guilin) Geology and Mining Company, 541004, Guilin, Guangxi, China

    Peicheng Mo

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  1. Xixi Hu
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  2. Ailing Sun
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  3. Yang Liu
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  4. Shenglin Zhong
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Correspondence to Yi Wu.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Xixi Hu, Sun, A., Liu, Y. et al. Synthesis of TiC0.5–Al and Effect of Sintering Temperature on Mechanical Properties of PcBN Composites. J. Superhard Mater. 45, 131–139 (2023). https://doi.org/10.3103/S1063457623020041

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