摘要
金刚石固有的缺陷,如裂纹和磁性包裹体的存在降低了其力学性能和热稳定性,也使金刚石工具的使用性能降低。本文利用离子束注入技术,对金刚石表面同时注入钛、氮离子来改善人造金刚石的性能进行了试验研究。测量了经离子注入处理的金刚石的抗压强度和热稳定性,以及孕镶金刚石复合材料的抗弯强度和磨耗比。试验结果表明:钛、氮离子注入后,填补了金刚石晶体表面的缺陷,从而提高了金刚石的抗压强度和热稳定性,其抗压强度提高了6-34％,热失重率降低了20％。此外,和离子注入前相比,用离子注入后的金刚石烧结的复合材料的抗弯强度和磨耗比也有了较大幅度的提高。
Synthetic diamond s inherent defects, such as crack and magnetic inclusion, deteriorate its mechanical properties and thermal stability, as well as the working performance of the diamond tools. In this paper, the experiments of Ti and N ion implanting into synthetic diamond crystals have been carried out so as to improve the properties of diamond. The compressive strength and thermal stability of the ion-implanted synthetic diamond crystals were measured. Also, the effects of ion implantation on the transverse rupture strength and abrasion ratio of metal-bonded diamond impregnated composite were investigated. It is showed that both its compressive strength and thermal stability remarkably increased after the diamond was implanted with Ti and N ion, because the defects on the surface of the diamond were repaired by the ions. In comparison with that of unimplanted diamond, the compressive strength of the ion-implanted diamond was increased by 6-34% and the weight loss after heating was reduced by 20% . The transverse rupture strength and abrasion ratio of the composite sintered with ion implanted diamond were notably improved as well.
出处
《金刚石与磨料磨具工程》
CAS
2003年第6期26-29,共4页
Diamond & Abrasives Engineering
