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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

崔喜伟, 秦越, 毛荣琪, 郝敬林, 赵思壮, 林正得, 邓丽芬, 江南, 崔平. 合成聚晶金刚石过程的颗粒冷压破碎[J]. 金刚石与磨料磨具工程, 2023, 43(4): 440-446. doi: 10.13394/j.cnki.jgszz.2022.0178
引用本文: 崔喜伟, 秦越, 毛荣琪, 郝敬林, 赵思壮, 林正得, 邓丽芬, 江南, 崔平. 合成聚晶金刚石过程的颗粒冷压破碎[J]. 金刚石与磨料磨具工程, 2023, 43(4): 440-446. doi: 10.13394/j.cnki.jgszz.2022.0178
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

合成聚晶金刚石过程的颗粒冷压破碎

doi: 10.13394/j.cnki.jgszz.2022.0178
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

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

  • 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G20~30在双粒径配方G2~4和G20~30中比在单一粒径G20~30配方中破碎更少,更有利于提升金刚石粉体堆积密度。

     

  • 图  1  叶蜡石立方压胚组装示意图

    Figure  1.  Schematic drawing of the cubic capsule assembling

    图  2  样品不同阶段的密度变化

    Figure  2.  Sample densities at different stages

    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

    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

    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

    图  6  样品的SEM微观形貌

    Figure  6.  SEM morphologies of the samples

    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 MPaΔ系统油压30 MPaΔ系统油压40 MPaΔ
    A20.018.76.517.01516.915.5
    B24.712.15110.756.710.258.7
    C17.115.87.615.49.915.012.3
    D16.815.76.513.320.813.221.4
    下载: 导出CSV
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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

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