摘要
采用真空微蒸发镀覆技术对由铁基触媒高温高压合成的金刚石单晶进行了镀钛处理。以相同粒度和型号的普通金刚石为对比样品,讨论了镀钛处理对金刚石晶体形貌及性能的影响。结果表明,金刚石表面形成致密、连续的金属镀层使其纯净度和透光性下降;界面反应的发生和碳化物过渡层的生成,增加了晶体的表面粗糙度,晶体结晶形态发生微变。金刚石会因镀层对表面缺陷的弥合和与晶体的冶金结合而得到强化。在镀层的保护下,金刚石可免受热损伤,热稳定性得到提升。
Diamond single crystal, synthesized under high temperature and pressure, was coated with Ti by vacuum microevaporation deposition method. The effects of Ti coating on crystal morphology and properties were discussed with comparison of uncoated diamond with the same grain size and type. The results show that the purity and transparence of the crystal decline because of the compact and continuous Ti coating layer. Due to the interface reaction and the form of carbide transition layer,the surface roughness of diamond increases and crystal configuration changes lightly. Meanwhile, the coating layer can also strengthen diamond crystal by repairing the surface defect and forming metallurgical bond with diamond. Owing to the protection of coating layer, the diamond crystal can avoid thermal damage and its thermal stability can be improved.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第9期33-35,共3页
Heat Treatment of Metals
关键词
真空微蒸发镀覆
钛
人造金刚石
晶体形貌
热稳定性
vacuum micro-evaporation deposition
Titanium
synthetic diamond
crystal morphology
thermal stability
