High Pressure Sintering of B-C-N-Ti Quaternary Superhard Composites

HUANG Hongdong; YU Xiaohui; HE Duanwei

doi:10.11858/gywlxb.20240769

Volume 38 Issue 4

Jul 2024

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Chinese Journal of High Pressure Physics > 2024 > 38(4): 041102.

HUANG Hongdong, YU Xiaohui, HE Duanwei. High Pressure Sintering of B-C-N-Ti Quaternary Superhard Composites[J]. Chinese Journal of High Pressure Physics, 2024, 38(4): 041102. doi: 10.11858/gywlxb.20240769

Citation:

HUANG Hongdong, YU Xiaohui, HE Duanwei. High Pressure Sintering of B-C-N-Ti Quaternary Superhard Composites[J]. Chinese Journal of High Pressure Physics, 2024, 38(4): 041102. doi: 10.11858/gywlxb.20240769

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High Pressure Sintering of B-C-N-Ti Quaternary Superhard Composites

doi: 10.11858/gywlxb.20240769

HUANG Hongdong^1
,,
YU Xiaohui^{2,*
,
,},
HE Duanwei^{1,*
,
,}

1.
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, Sichuan, China
2.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received Date: 29 Mar 2024
Rev Recd Date: 25 Apr 2024

Available Online: 08 Jul 2024

Issue Publish Date: 25 Jul 2024

Abstract

Abstract

In this work, the B-C-N-Ti quaternary superhard composite was prepared by high pressure and high temperature sintering with diamond, cubic boron nitride (cBN) and titanium (Ti) as starting materials. The characterization results show that Ti reacts with diamond and cBN to form TiC_0.7N_0.3 and TiB₂ under high pressure and high temperature, which acts as the binding additives for diamond and cBN grains. The addition of appropriate amount of Ti can effectively improve the toughness of the sintered composite specimen. The formation of TiC_0.7N_0.3 and TiB₂ ceramics and cBN coated the diamond grains and greatly enhanced the oxidation ability. When the molar ratio of diamond, cBN and Ti is 2∶1∶0.10 and sintered at 12 GPa and 2000 ℃ for 5 min, the specimen exhibits the best performance with Vickers hardness of (49.0±1.2) GPa, fracture toughness of (14.2±0.6) MPa·m^1/2 and oxidation temperature of 921 ℃ under air condition.
- diamond,
- cBN,
- titanium,
- superhard composites,
- high pressure and high temperature,
- sintering

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References(31)

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