金刚石初始粒径对金刚石聚晶层形貌及表面残余应力的影响  

Effect of original size of diamond on morphology and surface residual stress in polycrystalline diamond (PCD)

作　　者：贾洪声[1] 李彦涛[2] 王琰弟[1] 王连儒[1] 马红安[1] 贾晓鹏[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,吉林长春130012 [2]河南工业大学,河南郑州450052

出　　处：《超硬材料工程》2010年第4期21-23,共3页Superhard Material Engineering

摘　　要：在高温高压条件下（5.2-5.6 GPa,1350℃-1450℃）,以镍基合金为烧结助剂采用熔渗法制备了金刚石复合片（PDC）。采用SEM考察了不同金刚石微粉粒径制备的金刚石复合片中金刚石聚晶（PCD）的组织形貌。通过Raman光谱利用静水压应力模型表征了PCD层表面应力。结果表明,PCD层形成了致密的交错生长结构;PCD层表面残余应力表现为压应力并随着初始金刚石微粉粒径的增大而增大,其值为0.12-0.22GPa。Polycrystalline diamond compact（PDC） was prepared by infiltration method with nickel-based alloy as solvent under high temperature and high pressure （5.2～6.0GPa,1350℃～1450℃）.Scanning electron microscopy（SEM） was used to observe the micro morphology of polycrystalline diamond（PCD） layer.Raman spectroscopy was used to characterize the residual stress of PCD layer surface by hydrostatic stress model.It was found that dense and interlaced microstructure has formed in PCD layer.The residual stress of PCD layer is a compressive in the range from 0.12 GPa to 0.22 GPa,which increases with the diamond crystal size increasing.

关 键 词：镍基 PCD 金刚石 形貌 应力 

分 类 号：TQ164[化学工程—高温制品工业]