【摘要】 采用气雾化Fe70Ni30粉末触媒及Φ38mm合成腔体,在国产Y-500型六面顶压机(缸径Φ500mm)上进行了高品质金刚石的合成实验研究。结果表明,平均单产为72ct,静压强度值在198.9~260.7kN之间,合成金刚石的TI、TTI值分别为74%~79.5%和66.8%~70.3%,且TI值和TTI值之差在10%以内,合成的金刚石为金黄色,晶型完整率高,呈六八面体,杂质含量少且呈规则分布,质量基本上接近于国外SMD20/SMD30产品水平。合成的金刚石质量的明显改善应归功于所采用的Fe70Ni30粉末触媒合成工艺对金刚石生长环境的改善和生长速率的有效控制。更多还原

【Abstract】 The synthesizing experiment of high quality diamond was carried out at the Y-500 type cubic press with 38-millimeter diameter of reaction chamber by using gas atomization Fe70Ni30 powdered catalyst. The results show that the synthetic diamond possesses properties of average yield of 72 carats per each synthesis cycling, the static strength value of about 198.9-260.7KN, the toughness index (TI) of 74%-79.5% and thermal toughness index (TTI) of 66.8%-70.3% respectively, and the difference of TTI and TI value within 10%, as well as the perfect crystal shape with low impurity, which was closed to that of the SMD20/ SMD30 products abroad. The high quality of the synthetic diamond was due to the improvement of the growth conditions in the powdered catalyst-graphite system and the effective controlling of the growth rate of the crystal at the synthesizing conditions.更多还原