摘要
在高温高压条件下(5.6GPa,1200℃～1480℃),以含硼金刚石微粉为原料,镍基合金为烧结助剂,采用熔渗法成功制备了热稳定金刚石聚晶(Thermally stable PCD)。通过X射线衍射(XRD)和扫描电镜(SEM),研究了烧结温度对热稳定金刚石聚晶的物相成分、微观组织形貌的影响;并与普通金刚石聚晶进行了差热(DTA)、热重(TG)的对比分析测试,结合X射线光电子能谱(XPS)测试结果给出了相应解释。实验结果表明:在压强为5.6GPa条件下,温度在1300℃～1450℃区间内,才能实现热稳定PCD的烧结;此时形成的热稳定PCD的耐热性和抗氧化性相比普通PCD均有较大幅度提高。
In this paper,we report the synthesis and characterization of thermally stable polycrystalline diamond（PCD） using Ni-based alloys catalyst as a sintering aid and the B-doped diamond powder in the infiltrating way.The samples were treated at 5.6GPa and 1200℃～1480℃ for 10 min in China-type cubic hinge apparatus.Scanning electron microscopy showed significant intergrowth of the diamond particles sintered in the presence of Ni-based alloy.X-ray diffraction showed the phase change of the samples sintered at the different temperature.Differential thermal analysis（DTA） and thermo-gravimetric analysis（TG） showed the sample was significantly more heat-resisting compared to conventional PCD.And the X-ray photoelectron spectroscopy（XPS） investigation of the samples was carried out in order to gain more knowledge about the role of the boron doped in the thermally stable polycrystalline diamond.The results showed that the appropriate conditions of thermally stable PCD sintered were 5.6GPa and 1200℃～1480℃.
出处
《超硬材料工程》
CAS
2011年第3期1-5,共5页
Superhard Material Engineering
基金
牡丹江师范学院科研基金项目(项目编号:QY201003)资助
牡丹江师范学院科技青年创新项目(项目编号:Qc200905)资助
牡丹江市科学技术计划项目(项目编号:G2010g0004)资助
牡丹江市科学技术计划项目(项目编号:G2011g0004)资助
黑龙江省教育厅科技面上项目(项目编号:11551518)资助
关键词
金刚石聚晶
熔渗法
制备
热稳定性
polycrystalline diamond
infiltration
fabrication
thermally stable characterization
