Synthesis of Polycrystalline Diamond Compact with Selenium:Discovery of a New Se–C Compound  

作　　者：Wen-Dan Wang Ao Li Guo-Heng Xu Pei Wang Yue-Gao Liu Li-Ping Wang 王文丹;黎傲;徐国恒;王培;刘月高;王李平(School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031;Materials Research Center,Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000;Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology(SUSTech),Shenzhen 518055;CAS Key Laboratory for Experimental Study under Deep-Sea Extreme Conditions,Institute of Deep-Sea Science and Engineering,Chinese Academy of Sciences,Sanya 572000)

机构地区：[1]School of Physical Science and Technology,Southwest Jiaotong Universit,Chengdu 610031 [2]Materials Research Center,Institute of Modern Physics,Chinese Acadermy of Sciences,Lanzhou 730000 [3]Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology(SUSTech),Shenzhen 518055 [4]CAS Key Laboratory for Experimental Study under Deep-Sea Extreme Conditions,Institute of Deep-Sea Science and Engineering,Chinese Academy of Sciences,Sanya 572000

出　　处：《Chinese Physics Letters》2020年第5期102-105,共4页中国物理快报（英文版）

基　　金：National Natural Science Foundation of China(Grant No.51402245);Fundamental Research Funds for the Central Universities of China(Grant No.2682016CX062);China Scholarship Council(Grant No.201707005071);Shenzhen Peacock Plan(Grant No.KQTD2016053019134356);Guangdong Innovative&Entrepreneurial Research Team Program(Grant No.2016ZT06C279);HPCAT operations are supported by US DOE/NNSA under Award No.DE-NA0001974;DOE-BES under Award No.DE-FG02-99ER45775;partial instrumentation funding by NSF;APS is supported by DOE-BES under Contract No.DE-AC02-06CH11357。

摘　　要：Sintering of polycrystalline diamond with selenium was investigated under pressure of 6.5-10.5 GPa at a constant temperature of 1850℃.A new carbon-selenium compound with a most plausible chemical formula of SeC and a WC-type hexagonal structure(space group P6m2)has been discovered in the recovered samples sintered at 10.5 GPa and 1850℃.Refined lattice parameters are as follows:a=2.9277(4)A,c=2.8620(4)A,V=21.245(4)A^3.The diamond compacts hot-pressed at 10.5 GPa have excellent mechanical properties with a Vickers hardness of about 68 GPa at a loading force of 19.6 N.Diamond intergrowths observed in these samples may have benefited from the catalytic effects of Se/SeC on the nucleation and crystal growth of diamond.

关 键 词：DIAMOND HEXAGONAL VICKERS 

分 类 号：TQ163[化学工程—高温制品工业]