| 纳米聚晶金刚石的高压高温合成 |
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| 引用本文： | 许超,贺端威,王海阔,管俊伟,贺凯,李风姣,宴小智,惠博,彭放,王文丹.纳米聚晶金刚石的高压高温合成[J].珠宝科技,2011(4):9-12. |
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| 作者姓名： | 许超 贺端威 王海阔 管俊伟 贺凯 李风姣 宴小智 惠博 彭放 王文丹 |
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| 作者单位： | 四川大学原子与分子物理研究所,成都610065 |
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| 基金项目： | 国防重大专项（子）课题（GEZX0204020808.2） |
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| 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。
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| 关 键 词： | 纳米聚晶金刚石 高压高温 合成 |
Synthesis of nano-polycrystalline diamond under high pressure and high temperature |
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| XU Chao,HE Duan-wei,WANG Hai-kuo,GUAN Jun-wei,HE Kai,LI Feng-jiao,YAN Xiao-zhi,HUI Bo,PENG Fang,WANG Wen-dan.Synthesis of nano-polycrystalline diamond under high pressure and high temperature[J].Jewellery Science and Technology,2011(4):9-12. |
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| Authors: | XU Chao HE Duan-wei WANG Hai-kuo GUAN Jun-wei HE Kai LI Feng-jiao YAN Xiao-zhi HUI Bo PENG Fang WANG Wen-dan |
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| Affiliation: | (Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China) |
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| Abstract: | 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. |
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| Keywords: | nano-polycrystalline diamond high pressure and high temperature |
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