纳米聚晶金刚石的高压高温合成  

Synthesis of nano-polycrystalline diamond under high pressure and high temperature

作　　者：许超[1] 贺端威[1] 王海阔[1] 管俊伟[1] 贺凯[1] 李风姣[1] 宴小智[1] 惠博[1] 彭放[1] 王文丹[1] 

机构地区：[1]四川大学原子与分子物理研究所,成都610065

出　　处：《超硬材料工程》2011年第4期9-12,共4页Superhard Material Engineering

基　　金：国防重大专项(子)课题(GEZX0204020808.2)

摘　　要：利用自行研制的二级大腔体静高压装置,通过高温超高压下石墨向金刚石的直接转变,合成出了纳米聚晶金刚石块体材料。合成压力约为17GPa,温度约为2300℃。微区X射线衍射分析表明,石墨转变成了立方相的金刚石。扫描电子显微镜及X射线全谱拟合分析显示,合成出来的金刚石晶粒尺寸约16nm。压痕法测得的样品维氏硬度为100GPa以上。Bulk material of nano-polycrystalline diamond is synthesized by independently developed two-stage large cavity static high-pressure device through the direct transformation from graphite to diamond under ultra-high pressure and high temperature.The synthesis pressure is about 17GPa and temperature is about 2300℃.Micro X-ray diffraction analysis indicates that the graphite has been transformed into cubic phase diamond.The scanning electron microscopic picture and whole spectrum fitting analysis of X-ray shows that the dimension of synthesized diamond crystal is about 16nm.The Vickers hardness of the sample measured by the indentation method is above 100GPa.

关 键 词：纳米聚晶金刚石 高压高温 合成 

分 类 号：TQ164[化学工程—高温制品工业]