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中文摘要：
以铁、镍单质金属粉和适量的电解铜粉为原料，采用粉末冶金方法制备规格为Ф15×0．5mm的片状铁基触媒，在六面顶压机上高温高压合成金刚石单晶。通过分析金刚石的产量、形貌、粒度与晶形分布、静压强度、冲击韧性、磁化率以及热稳定性等，探讨添加剂铜对铁基触媒合成金刚石的影响。实验发现，在铁基触媒中添加适量的铜粉可以有效地控制金刚石的成核数量和生长速率，使得粒度增粗，晶体完整度增加，杂质与包裹体的数量减少，纯净度提高。相应的，金刚石的主要性能指标均高于普通金刚石，超过SMD25锯片级金刚石性能要求。
英文摘要：
Diamond single crystals were synthesized at a cubic press under high- temperature and high-pressure （HTHP） with the sheeted powder metallurgical iron-based catalysts, which were added by moderate copper powder. The effects of copper additive on diamond synthesis were discussed by general analyzing the yield, surface morphology, distribution of grain size and crystal shape, static compressive strength, impact toughness, magnetization and thermal stability of diamond. The experimental results indicate that the addition of copper can effectively control the nucleation number and growth velocity of diamond, so as to get coarse crystal grit, enhance the integrality of crystal, reduce the amount of impurity and inclusion and increase the purity of diamond. The direct influence of copper additive is improving the general properties of diamond single crystal and making some of the properties exceed those of SMD25.
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