金刚石烧结体残余应力的Raman表征  

Raman characterization of the residual stress of sintered diamonds

作　　者：贾洪声[1] 鄂元龙[1] 华中[1] 贾晓鹏[2] 马红安[2] 李季[1] 李海波[1] 

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林四平136000 [2]吉林大学超硬材料国家重点实验室,吉林长春130012

出　　处：《超硬材料工程》2012年第6期6-9,共4页Superhard Material Engineering

基　　金：国家自然基金项目(50731006);四平市科技发展计划项目;吉林大学开放课题(201201)

摘　　要：通过采用微区拉曼光谱(micro-Raman spectroscopy)测试了不同类型金刚石烧结体的残余应力形式及大小。结果表明,金刚石复合片(PDC)存在不同形式的残余应力(压应力和拉应力),金刚石烧结体径向区域的残余应力为中心高,边缘低;而金刚石球齿应力分布规律不明显,数值亦差别巨大。综上分析,金刚石制品应力分布不均匀主要是由于烧结过程中温度梯度所致。由此,控制高压烧结腔体温场的均一性,是改善残余应力的有效途径。The form and size of the residual stress of different type sintered diamonds were tested through micro-Raman spectroscopy. The results show that there are different forms of the residual stress （compressive stress and tensile stress） on polycrystalline diamond compact （PDC）, and the residual stress of the radial zone of the PDC express as high center and low edges; While the stress distribution rule of diamond ball gear is not obvious, and the value also has a big difference. Summary, the non-uniform stress distri- bution is mainly attributable to the temperature gradient under the sintering process. Thus, controlling the temperature field uniformity of the sintering cavity is an effective way to improve the residual stress.

关 键 词：金刚石 残余应力 拉曼光谱 温度梯度 

分 类 号：TQ163[化学工程—高温制品工业] O521.3[理学—高压高温物理]