Cold compaction and crushing of diamond powders during the sintering of polycrystalline diamond

CUI Xiwei; QIN Yue; MAO Rongqi; HAO Jinglin; ZHAO Sizhuang; LIN Zhengde; DENG Lifen; JIANG Nan; CUI Ping

doi:10.13394/j.cnki.jgszz.2022.0178

Volume 43 Issue 4

Aug. 2023

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Article Navigation > Diamond & Abrasives Engineering > 2023 > 43(4): 440-446

CUI Xiwei, QIN Yue, MAO Rongqi, HAO Jinglin, ZHAO Sizhuang, LIN Zhengde, DENG Lifen, JIANG Nan, CUI Ping. Cold compaction and crushing of diamond powders during the sintering of polycrystalline diamond[J]. Diamond & Abrasives Engineering, 2023, 43(4): 440-446. doi: 10.13394/j.cnki.jgszz.2022.0178

Citation:

CUI Xiwei, QIN Yue, MAO Rongqi, HAO Jinglin, ZHAO Sizhuang, LIN Zhengde, DENG Lifen, JIANG Nan, CUI Ping. Cold compaction and crushing of diamond powders during the sintering of polycrystalline diamond[J]. Diamond & Abrasives Engineering, 2023, 43(4): 440-446. doi: 10.13394/j.cnki.jgszz.2022.0178

Citation:

CUI Xiwei, QIN Yue, MAO Rongqi, HAO Jinglin, ZHAO Sizhuang, LIN Zhengde, DENG Lifen, JIANG Nan, CUI Ping. Cold compaction and crushing of diamond powders during the sintering of polycrystalline diamond[J]. Diamond & Abrasives Engineering, 2023, 43(4): 440-446. doi: 10.13394/j.cnki.jgszz.2022.0178

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Cold compaction and crushing of diamond powders during the sintering of polycrystalline diamond

doi: 10.13394/j.cnki.jgszz.2022.0178

CUI Xiwei^{1, 2
,},
QIN Yue²,
MAO Rongqi^{2, 3},
HAO Jinglin^{2, 4},
ZHAO Sizhuang^{2, 4},
LIN Zhengde²,
DENG Lifen^{2
,
,},
JIANG Nan²,
CUI Ping¹

1.
School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
2.
Ningbo Institute of Materials Technology & Engineering, CAS, Ningbo 315201, Zhejiang, China
3.
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
4.
School of Materials Science and Engineering, Taiyuan University of Science & Technology, Taiyuan 030024, China

More Information

Received Date: 2022-10-26
Accepted Date: 2023-02-16
Rev Recd Date: 2023-02-11

Abstract

Abstract

To improve the density of polycrystalline diamond, a study was conducted to investigate the changes in diamond powder under different pressure conditions, including initial loading, cold isostatic pressing, and six-sided die pressing. The study focused on the particle size distribution, powder density, and microstructural rearrangement before and after applying pressure to different diamond powder sizes and ratios. The process involved the initial random arrangement of particles, followed by the filling of fine particles into voids and rearrangement at 220 MPa during cold isostatic pressing. Subsequently, under ultra-high pressure, large particles (G_20～30) were crushed and gradually filled the voids. The buffering effect of fine particles resulted in fewer fractures in the dual particle size formula (G_2～4and G_20～30) compared to the single particle size formula (G_20～30), which facilitated higher stacking density of the diamond powder. These findings provide valuable data support for optimizing the particle size and ratio design of diamond powders for the high-temperature high-pressure (HPHT) synthesis of high-performance polycrystalline diamond composite.
- polycrystalline diamond (PCD),
- powder density,
- particle size distribution,
- cold pressing,
- crushing

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References(14)

References

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