Wuhan University of Technology's scientific and technological achievement - Key technology for low-pressure preparation of ultra-hard diamond composite materials by electric discharge plasma sintering
Release time:
2025-06-18
To solve the problem of polycrystalline diamond sintering, both domestic and international research mainly uses methods such as adding sintering aids and liquid phase sintering. Common sintering aids include Co, Ni, B, Si, and Ti, which can moderately reduce the sintering pressure. However, in existing preparation technologies, the sintering preparation of diamond still requires ultra-high pressure above 5 GPa. The ultra-high pressure preparation conditions of diamond need further improvement. Diamond synthesis and preparation technology below 0.5 GPa is a research hotspot in the scientific and industrial communities. This technology at 100 MPa has broad application prospects and significant promotion value.
Superhard Diamond Composite
Key Technology for Low-Pressure Preparation of Spark Plasma Sintered Composites
Keywords: Superhard diamond composite material , Spark Plasma Sintering, Powder Chemical Vapor Deposition
1. Technical Field:
2. Application Industries:
Cutting Tools and other new materials
3. Result Overview:
Diamond is the hardest material in nature, and it is widely used in cutting tools, oil exploration, and precision processing. Due to limitations in size and quantity, natural diamonds are extremely expensive, and the preparation of polycrystalline diamond is an urgent industrial need. This achievement provides a technical path for preparing ultra-high-hardness diamond composite materials using spark plasma sintering. By modifying the surface of the diamond powder with silicon carbide, the graphitization phase transformation of diamond during high-temperature sintering is inhibited. This achievement has a low sintering pressure, with a 100 MPa sintering pressure being 2% of the conventional diamond preparation pressure (above 5 GPa). The diamond composite material prepared by this achievement has high density and high hardness. The Vickers hardness of the superhard diamond composite material can reach up to 36 GPa. Graphite phase transformation.
4. Market Prospects:
To solve the problem of polycrystalline diamond sintering, both domestic and international methods mainly use the addition of sintering aids and liquid phase sintering. Commonly used sintering aids include Co, Ni, B, Si, and Ti, which can moderately reduce the sintering pressure. However, in existing preparation technologies, diamond sintering still requires ultra-high pressure above 5 GPa. The ultra-high-pressure preparation conditions of diamond need further improvement, and the synthesis and preparation of diamond below 0.5 GPa is a research hotspot in the scientific and industrial communities. This technology at 100 MPa has broad application space and significant promotion value.
5. Application Scenarios:
Cutting tools, oil exploration, precision processing, etc.
Core patented technology:
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