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Micro-nano polycrystalline diamond composite material and preparation method thereof
The invention discloses a micro-nano polycrystalline diamond composite material and a preparation method thereof. The micro-nano polycrystalline diamond composite material comprises the following components: carbon nano onions and micron diamond, wherein the mass percent of the micron diamond is 20-50wt.%, and the balance is the carbon nano onions; and the Vickers hardness of the micro-nano polycrystalline diamond composite material ranges from 30 GPa to 200 GPa. The preparation method comprises the following steps: carrying out annealing treatment on detonation nano diamond powder to preparecarbon nano onions; adding micron diamond crystal grains for mixing, wherein the mass percent of the micron diamond is 20-50wt.%; a mixture formed by the micron diamond and the carbon nano onions is filled into a WC hard alloy die to be pre-pressed, the pre-pressing pressure is 400-600 MPa, and pre-pressing is conducted for 10-30 s; and a pre-pressed sample is put into a mold for high-temperatureand high-pressure sintering, and the micro-nano polycrystalline diamond composite material is prepared. The Vickers hardness of the micro-nano polycrystalline diamond is nearly one time higher than the Vickers hardness of a common PCD, and the performance of the micro-nano polycrystalline diamond is obviously improved.
本发明公开了一种微‑纳米级聚晶金刚石复合材料及其制备方法，其成分包含碳纳米葱和微米金刚石；所述微米金刚石的质量百分比为20～50wt.％，余量为碳纳米葱；所述微‑纳米级聚晶金刚石复合材料的维氏硬度为30～200GPa。制备方法如下：将爆轰纳米金刚石粉进行退火处理，制得碳纳米葱；加入微米金刚石晶粒进行混料，且所述微米金刚石的质量百分比为20～50wt.％；将微米金刚石和碳纳米葱所形成的混合物装填入WC硬质合金模具中预压，预压压力为400～600MPa，预压10～30s；把预压后的样品装入模具中进行高温高压烧结，制得微‑纳米级聚晶金刚石复合材料。本发明的微‑纳米级聚晶金刚石的维氏硬度高出普通PCD维氏硬度近一倍，性能明显提高。
Micro-nano polycrystalline diamond composite material and preparation method thereof
The invention discloses a micro-nano polycrystalline diamond composite material and a preparation method thereof. The micro-nano polycrystalline diamond composite material comprises the following components: carbon nano onions and micron diamond, wherein the mass percent of the micron diamond is 20-50wt.%, and the balance is the carbon nano onions; and the Vickers hardness of the micro-nano polycrystalline diamond composite material ranges from 30 GPa to 200 GPa. The preparation method comprises the following steps: carrying out annealing treatment on detonation nano diamond powder to preparecarbon nano onions; adding micron diamond crystal grains for mixing, wherein the mass percent of the micron diamond is 20-50wt.%; a mixture formed by the micron diamond and the carbon nano onions is filled into a WC hard alloy die to be pre-pressed, the pre-pressing pressure is 400-600 MPa, and pre-pressing is conducted for 10-30 s; and a pre-pressed sample is put into a mold for high-temperatureand high-pressure sintering, and the micro-nano polycrystalline diamond composite material is prepared. The Vickers hardness of the micro-nano polycrystalline diamond is nearly one time higher than the Vickers hardness of a common PCD, and the performance of the micro-nano polycrystalline diamond is obviously improved.
本发明公开了一种微‑纳米级聚晶金刚石复合材料及其制备方法，其成分包含碳纳米葱和微米金刚石；所述微米金刚石的质量百分比为20～50wt.％，余量为碳纳米葱；所述微‑纳米级聚晶金刚石复合材料的维氏硬度为30～200GPa。制备方法如下：将爆轰纳米金刚石粉进行退火处理，制得碳纳米葱；加入微米金刚石晶粒进行混料，且所述微米金刚石的质量百分比为20～50wt.％；将微米金刚石和碳纳米葱所形成的混合物装填入WC硬质合金模具中预压，预压压力为400～600MPa，预压10～30s；把预压后的样品装入模具中进行高温高压烧结，制得微‑纳米级聚晶金刚石复合材料。本发明的微‑纳米级聚晶金刚石的维氏硬度高出普通PCD维氏硬度近一倍，性能明显提高。
Micro-nano polycrystalline diamond composite material and preparation method thereof
一种微-纳米级聚晶金刚石复合材料及其制备方法
LI YANGUO (author) / ZOU QIN (author) / WANG MINGZHI (author) / ZHAO YUCHENG (author) / DAI LIFENG (author) / WANG ZHIWEI (author)
2020-04-24
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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