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高硬度复合材料俄罗斯和波兰科学家最近合成出硬度接近金刚石、耐磨性超过金刚石的新型复合材料。科学家发现,金刚石单晶体各晶面的硬度均不相同,其抗压性为每平方米可承受700亿至1000亿牛顿的压力。但用这种物质制成的切削工具,在磨损的过程中会出现逐渐扩大的裂纹。专家发现,含有石墨微粒的炸药在爆炸时,所产生的高压高温会使石墨微粒瞬间化作约10纳米大小的金刚石微粒。把这些金刚石微粒和粉末状碳化硅放入环形高压室,并使高压室内的压力达到80亿帕斯卡,温度升高到
High-hardness composites Russian and Polish scientists recently synthesized a new type of composite material that has a hardness close to that of diamond and has more wear resistance than diamond. Scientists have found that the hardness of each crystal diamond single crystal surface are not the same, its compressive strength per square meter can withstand 70 billion to 100 billion Newton pressure. However, cutting tools made of this material, the gradual increase in the wear and tear during the crack. Experts have found that the high pressure and heat generated by explosives containing graphite particles during an explosion cause the graphite particles to instantly become diamond particles of about 10 nm in size. Put these diamond particles and powdered silicon carbide into the ring-shaped high-pressure chamber, and make the pressure in the high-pressure chamber reach 8 billion Pascal, the temperature rises to