Pressure Generation above 35 GPa in a Walker-Type Large-Volume Press  

作　　者：Yu-Chen Shang Fang-Ren Shen Xu-Yuan Hou Lu-Yao Chen Kuo Hu Xin Li Ran Liu Qiang Tao Pin-Wen Zhu Zhao-Dong Liu Ming-Guang Yao Qiang Zhou Tian Cui Bing-Bing Liu 尚宇琛;沈方韧;侯旭远;陈璐瑶;胡阔;李鑫;刘然;陶强;朱品文;刘兆东;姚明光;周强;崔田;刘冰冰(State Key Laboratory of Superhard Materials,Jilin University,Changchun 130012,China;Synergetic Extreme Condition User Facility,Jilin University,Changchun 130012,China)

机构地区：[1]State Key Laboratory of Superhard Materials,Jilin University,Changchun 130012,China [2]Synergetic Extreme Condition User Facility,Jilin University,Changchun 130012,China

出　　处：《Chinese Physics Letters》2020年第8期25-30,共6页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.51320105007,11634004 and 41902034);the Fundamental Research Funds for the Central Universities of China(Grant No.45119031C037);the Program for Changjiang Scholars and Innovative Research Team in University(Grant No.IRT1132).

摘　　要：Pressure generation to a higher pressure range in a large-volume press(LVP)denotes our ability to explore more functional materials and deeper Earth's interior.Pressure generated by normal tungsten carbide(WC)anvils in a commercial way is mostly limited to 25 GPa in LVPs due to the limitation of their hardness and design of cell assemblies.We adopt three newly developed WC anvils for ultrahigh pressure generation in a Walker-type LVP with a maximum press load of 1000 ton.The hardest ZK01F WC anvils exhibit the highest efficiency of pressure generation than ZK10F and ZK20F WC anvils,which is related to their performances of plastic deformations.Pressure up to 35 GPa at room temperature is achieved at a relatively low press load of 4.5 MN by adopting the hardest ZK01F WC anvils with three tapering surfaces in conjunction with an optimized cell assembly,while pressure above 35 GPa at 1700 K is achieved at a higher press load of 7.5 MN.Temperature above 2000 K can be generated by our cell assemblies at pressure below 30 GPa.We adopt such high-pressure and high-temperature techniques to fabricate several high-quality and well-sintered polycrystalline minerals for practical use.The present development of high-pressure techniques expands the pressure and temperature ranges in Walker-type LVPs and has wide applications in physics,materials,chemistry,and Earth science.

关 键 词：CARBIDE INTERIOR POLYCRYSTALLINE 

分 类 号：TM91[电气工程—电力电子与电力传动] TQ136.13[化学工程—无机化工]