摘要
制备出碳含量高达 4 1 .1χ%的铁碳化合物 ,并实现用铁碳化合物作碳源兼触媒合成金刚石。铁碳化合物粉末粒度为 80～ 1 0 0目 ,在压力 5.5GPa,温度 1 62 0 K,保压 8min的条件下生长出粒度为 5～ 1 0 0 μm的金刚石颗粒。对其显微形貌的成因进行分析 ,并对比常规触媒合成金刚石的显微形貌 ,提出了“再结晶石墨是由金属膜冷却过程产生”的观点 。
Iron carbide with C content 41.1 χ % was prepared, its powder size is 80~100mesh. As carbon source and catalysts, it can synthesize diamond of 5~100μm under high pressure of 5.5GPa and high temperature of 1620K for 8 minutes. In this paper, the formation reason of morphology around diamonds is also expained. Compared with microstructure of diamonds which are synthesized by NiMnCo catalysts, we draw a conclusion that falling of temperature causes formation of recrystallized graphite in metal films. The experiment primarily proved the Correctness of TFDC Theory about synthetic large size diamond.
出处
《机械工程材料》
CAS
CSCD
北大核心
2000年第3期31-32,35,共3页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目! ( 5 963 10 60 )
