Effect of Ti<sub>3</sub>AlC<sub>2</sub> content on microstructure and properties of PcBN materials

MA Jinming; XIAO Changjiang; TAO Hongjun; ZHANG Qunfei; TANG Lihui; CAO Jianfeng; LI Yuan; ZHOU Shijie; TANG Yulin; CHEN Yachao; LI Zhengxin

doi:10.13394/j.cnki.jgszz.2023.0048

Volume 44 Issue 2

Apr. 2024

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Article Navigation > Diamond & Abrasives Engineering > 2024 > 44(2): 179-184

MA Jinming, XIAO Changjiang, TAO Hongjun, ZHANG Qunfei, TANG Lihui, CAO Jianfeng, LI Yuan, ZHOU Shijie, TANG Yulin, CHEN Yachao, LI Zhengxin. Effect of Ti3AlC2 content on microstructure and properties of PcBN materials[J]. Diamond & Abrasives Engineering, 2024, 44(2): 179-184. doi: 10.13394/j.cnki.jgszz.2023.0048

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MA Jinming, XIAO Changjiang, TAO Hongjun, ZHANG Qunfei, TANG Lihui, CAO Jianfeng, LI Yuan, ZHOU Shijie, TANG Yulin, CHEN Yachao, LI Zhengxin. Effect of Ti₃AlC₂ content on microstructure and properties of PcBN materials[J]. Diamond & Abrasives Engineering, 2024, 44(2): 179-184. doi: 10.13394/j.cnki.jgszz.2023.0048

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Effect of Ti₃AlC₂ content on microstructure and properties of PcBN materials

doi: 10.13394/j.cnki.jgszz.2023.0048

1.
School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
2.
ZYNP Group DING RUI Technology Co., Ltd., Jiaozuo 454750, Henan, China
3.
recision Industry Revolution Equipment Technology (Henan) Co., Ltd., Zhengzhou 450001, China
4.
Zhengzhou Wode Superhard Material Co., Ltd., Zhengzhou 450001, China
5.
Zhengzhou Hitko Dia/CBN Tool Co., Ltd., Zhengzhou 450001, China

More Information

Received Date: 2023-03-03
Accepted Date: 2023-06-28
Rev Recd Date: 2023-06-10

Abstract

Abstract

The monolithic PcBN composite tool materials were prepared at 5.5 GPa and 1450 ℃ with different contents of Ti₃AlC₂ as the binder phase. The effects of different mass fractions of Ti₃AlC₂ on the phase composition, microstructure, and mechanical properties of PcBN tool materials were studied. The results show that Ti₃AlC₂ can decompose completely to form TiC and Al-Ti alloys under high temperature and high pressure, and reacts with cBN to form AlN, TiB₂, and TiC_0.7N_0.3 phases. TiC, AlN, TiB₂, and TiC_0.7N_0.3 are uniformly distributed around the cBN and tightly bonded to the cBN, thereby improving the mechanical properties of PcBN. When the mass fraction of Ti₃AlC₂ is 25 %, the relative density, bending strength, fracture toughness, and wear ratio of PcBN reach the maximum values, which are 98.9%, 592 MPa, 6.87 MPa·m^1/2and 7 350, respectively. When the mass fraction of Ti₃AlC₂ is 20%, the microhardness of PcBN reaches the maximum value of 4 786.7 HV.
- PcBN,
- Ti₃AlC₂,
- binder,
- high temperature and high pressure(HTHP),
- mechanical properties

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References(24)

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