摘要
为进一步提高孕镶金刚石颗粒的硬质合金基底上金刚石涂层的质量,提出了“预固晶”预处理新方法,即对基底附着钛粉后引晶,并通过微波进行预结合处理。借助SEM电镜、拉曼光谱分析、压痕试验等对比该方法与常规方法所制备的金刚石涂层质量及其结合性能。结果表明:预固晶预处理后,低温下金刚石形核密度较常规预处理的提高约1.5倍,涂层的均匀性和平整性明显提高;借助拉曼光谱分析可见,金刚石纯度指标及结晶度指标改善约30%,涂层内应力降低一半以上;压痕对比试验证明其结合强度得到了一定程度改善。
To further improve the quality of the diamond coatings deposited on diamond-particles-impregnated cemented carbide substrate,a pretreatment method of pre-fixing seeds is proposed.The substrate is attached with titanium powder and then seeded,and finally pre-fixed by microwave.The quality and bonding performance of the diamond film prepared by this method and the original conventional method are compared with SEM,Raman spectroscopy,and indentation experiments.The results show that after the pretreatment method of pre-fixing seeds,the diamond nucleation density at low temperature is about 1.5 times higher than that of the coating after conventional pretreatment,and that the uniformity and flatness of the coating are significantly improved.It can be seen that the purity index and crystallinity index of diamond have been improved about 30%and the internal stress of the coating has been decreased by 50%through the analysis with Raman spectroscopy.The indentation comparison experiment confirms that the bonding strength has been improved to a certain extent.
作者
简小刚
马千里
唐金垚
胡吉博
JIAN Xiaogang;MA Qianli;TANG Jinyao;HU Jibo(School of Mechanical and Energy Engineering, Tongji University, Shanghai 201804, China)
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2021年第1期5-11,共7页
Diamond & Abrasives Engineering
基金
国家自然科学基金(51275358)
中央高校专项基金(20140750)。
