摘要
金刚石工具应用时金刚石颗粒的脱落现象比较严重,影响工具寿命,而金刚石表面镀覆技术是解决这一问题的主要方法。应用盐浴镀铬技术会在金刚石表面形成含铬金属镀覆层。采用SEM、XRD等检测方法,对盐浴镀及相关处理后金刚石表面的镀覆层进行成分、显微组织、相结构和性能分析。结果表明,经盐浴镀后金刚石表面能形成较致密的镀覆层,抗压强度提高,比未镀覆层平均增加25.7%。经过相应的盐浴镀覆处理后,金刚石表面与镀层之间形成碳化物Cr3C2和Cr7C3。
The exfoliation phenomenon of diamond grains is comparatively server in application of diamond tools. It will affect the service life of tools. The surface coating metal of diamond is the effective method to solve it. The Cr-eontained metallic coating layers on diamond surface were formed by salt-bath plating Cr technology. The advanced testing methods such as Scanning Electron Microscopy （SEM）, X-ray diffraction （XRD） and so on were adopted to analyze the microstrueture, phase structures, composition of the surface layer and performances after salt-bath plating and correlative treatment. The results showed that the finer coated layers and well-distributed structure on the diamond surface were formed. The compressive strength of the layers increased by 25.7% than that of uncoated layers. Through the suitable treatment, some carbides, such as Cr3C2and Cr7C3, were formed between diamond surface and the coated layers after salt-bath plating.
出处
《兵器材料科学与工程》
CAS
CSCD
2009年第3期8-11,共4页
Ordnance Material Science and Engineering
基金
国家自然科学基金项目(50371048
50372035)
关键词
金刚石
盐浴镀
镀覆层
碳化物
抗压强度
diamond
salt-bath plating
coated layer
carbide
compressive strength
