合成聚晶金刚石过程的颗粒冷压破碎

崔喜伟; 秦越; 毛荣琪; 郝敬林; 赵思壮; 林正得; 邓丽芬; 江南; 崔平

doi:10.13394/j.cnki.jgszz.2022.0178

合成聚晶金刚石过程的颗粒冷压破碎

doi: 10.13394/j.cnki.jgszz.2022.0178

崔喜伟^{1, 2,},
秦越²,
毛荣琪^{2, 3},
郝敬林^{2, 4},
赵思壮^{2, 4},
林正得²,
邓丽芬^2, ,,
江南²,
崔平¹

1.
上海科技大学物质科学与技术学院, 上海 201210
2.
中国科学院宁波材料技术与工程研究所, 浙江宁波 315201
3.
浙江工业大学机械工程学院, 杭州 310014
4.
太原科技大学材料科学与工程学院, 太原 030024

基金项目: 国家“十四五”重点研发计划（2021YFB3701801）

详细信息

通讯作者:
邓丽芬，女，1979年生，正高级工程师、博士生导师。主要研究方向：金刚石及复材合成、加工及应用，金刚石材料的功能性应用。E-mail：denglifen@nimte.ac.cn

中图分类号: TQ164
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出版历程
- 收稿日期: 2022-10-26
- 修回日期: 2023-02-11
- 录用日期: 2023-02-16
- 刊出日期: 2023-08-30

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

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

摘要

摘要: 为提升聚晶金刚石的致密度，研究在初装、冷等静压后以及六面顶压机内等不同压力条件下，不同金刚石粉体粒径和配比在加压前后的粉体密度、粒径分布及重排微观结构变化，发现金刚石粉体的变化规律。合成过程包括初装料的无序排列到220 MPa等静压后的细颗粒填充孔隙与重排，再到超高压力下大颗粒被挤压破碎，孔隙被逐步填充。由于细颗粒的缓冲效应，大颗粒G_20～30在双粒径配方G_2～4和G_20～30中比在单一粒径G_20～30配方中破碎更少，更有利于提升金刚石粉体堆积密度。
- 聚晶金刚石(PCD) /
- 粉体密度 /
- 粒径分布 /
- 冷压 /
- 破碎
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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图 1 叶蜡石立方压胚组装示意图

Figure 1. Schematic drawing of the cubic capsule assembling

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图 2 样品不同阶段的密度变化

Figure 2. Sample densities at different stages

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图 3 样品在冷等静压前后的颗粒粒径分布曲线

Figure 3. Particle size distribution spectra of samples before and after cold isostatic pressing

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图 5 粉末最大粒径主峰D₅₀体积占比变化

Figure 5. Volume percentage variation of the main peak’s D₅₀

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图 4 样品在冷压前后的颗粒粒径分布曲线

Figure 4. Particle size distribution spectra of samples before and after cold pressing

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图 6 样品的SEM微观形貌

Figure 6. SEM morphologies of the samples

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表 1 主峰中位径D₅₀的体积分数及变化

Table 1. Volume percentage variation of the main peak’s D₅₀

样品体积分数φ/%
初始系统油压20 MPa Δ 系统油压30 MPa Δ 系统油压40 MPa Δ

A 20.0 18.7 6.5 17.0 15 16.9 15.5
B 24.7 12.1 51 10.7 56.7 10.2 58.7
C 17.1 15.8 7.6 15.4 9.9 15.0 12.3
D 16.8 15.7 6.5 13.3 20.8 13.2 21.4

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参考文献(14)

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合成聚晶金刚石过程的颗粒冷压破碎

doi: 10.13394/j.cnki.jgszz.2022.0178

通讯作者:
邓丽芬，女，1979年生，正高级工程师、博士生导师。主要研究方向：金刚石及复材合成、加工及应用，金刚石材料的功能性应用。E-mail：denglifen@nimte.ac.cn

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

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目录

样品	体积分数φ/%
样品	初始	系统油压20 MPa	Δ	系统油压30 MPa	Δ	系统油压40 MPa	Δ
A	20.0	18.7	6.5	17.0	15	16.9	15.5
B	24.7	12.1	51	10.7	56.7	10.2	58.7
C	17.1	15.8	7.6	15.4	9.9	15.0	12.3
D	16.8	15.7	6.5	13.3	20.8	13.2	21.4

留言板

合成聚晶金刚石过程的颗粒冷压破碎

doi: 10.13394/j.cnki.jgszz.2022.0178

通讯作者: 邓丽芬，女，1979年生，正高级工程师、博士生导师。主要研究方向：金刚石及复材合成、加工及应用，金刚石材料的功能性应用。E-mail：denglifen@nimte.ac.cn

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

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出版历程

目录

通讯作者:
邓丽芬，女，1979年生，正高级工程师、博士生导师。主要研究方向：金刚石及复材合成、加工及应用，金刚石材料的功能性应用。E-mail：denglifen@nimte.ac.cn