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Diamond-carbon nanotube composite material and preparation method and application thereof
The invention provides a diamond-carbon nano tube composite material, and the diamond-carbon nano tube composite material comprises diamond and a carbon nano tube, and does not comprise a sintering agent. Diamond serves as a typical superhard material, and the application range of diamond is seriously limited by intrinsic brittleness of diamond. The diamond micro powder and the CNT are compounded, the diamond-CNT composite material with superhardness and high toughness is successfully prepared through high-temperature and high-pressure sintering, the Vickers hardness of the diamond-CNT composite material is about 91 GPa, and Vickers hardness indentations have no obvious cracks. According to the scheme, the defect that in the conventional CNT fiber compounding process, the toughening efficiency is low due to the fact that the interlayer and surface layer friction sliding resistance of CNT is low is effectively overcome. The result shows that non-uniform stress distribution in the diamond micro-powder under high pressure is the key for successfully realizing the combination of the diamond-CNT microstructure and the interface.
本发明提供了一种金刚石‑碳纳米管复合材料，所述金刚石‑碳纳米管复合材料包括金刚石和碳纳米管，且不包括烧结剂。金刚石作为典型的超硬材料，其本征脆性严重限制了其应用范围。本发明将金刚石微粉与碳纳米管(CNT)复合，通过高温高压烧结成功制备了兼具超硬和高韧性质的金刚石‑CNT复合材料，其维氏硬度约为91GPa，且维氏硬度压痕无明显裂纹。本方案有效克服了常规CNT纤维复合过程中，因CNT的层间和表层摩擦滑动阻力低而导致的增韧效率低下。结果表明，高压下金刚石微粉内部存在不均匀的应力分布是成功实现金刚石‑CNT微观结构和界面结合的关键。
Diamond-carbon nanotube composite material and preparation method and application thereof
The invention provides a diamond-carbon nano tube composite material, and the diamond-carbon nano tube composite material comprises diamond and a carbon nano tube, and does not comprise a sintering agent. Diamond serves as a typical superhard material, and the application range of diamond is seriously limited by intrinsic brittleness of diamond. The diamond micro powder and the CNT are compounded, the diamond-CNT composite material with superhardness and high toughness is successfully prepared through high-temperature and high-pressure sintering, the Vickers hardness of the diamond-CNT composite material is about 91 GPa, and Vickers hardness indentations have no obvious cracks. According to the scheme, the defect that in the conventional CNT fiber compounding process, the toughening efficiency is low due to the fact that the interlayer and surface layer friction sliding resistance of CNT is low is effectively overcome. The result shows that non-uniform stress distribution in the diamond micro-powder under high pressure is the key for successfully realizing the combination of the diamond-CNT microstructure and the interface.
本发明提供了一种金刚石‑碳纳米管复合材料，所述金刚石‑碳纳米管复合材料包括金刚石和碳纳米管，且不包括烧结剂。金刚石作为典型的超硬材料，其本征脆性严重限制了其应用范围。本发明将金刚石微粉与碳纳米管(CNT)复合，通过高温高压烧结成功制备了兼具超硬和高韧性质的金刚石‑CNT复合材料，其维氏硬度约为91GPa，且维氏硬度压痕无明显裂纹。本方案有效克服了常规CNT纤维复合过程中，因CNT的层间和表层摩擦滑动阻力低而导致的增韧效率低下。结果表明，高压下金刚石微粉内部存在不均匀的应力分布是成功实现金刚石‑CNT微观结构和界面结合的关键。
Diamond-carbon nanotube composite material and preparation method and application thereof
一种金刚石-碳纳米管复合材料及其制备方法和应用
YU XIAOHUI (author) / ZHANG JIAWEI (author)
2023-12-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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