Ultrahigh Pressure Generation at High Temperatures in a Walker-Type Large-Volume Press and Multiple Applications  

作　　者：Xuyuan Hou Yuchen Shang Luyao Chen Bingtao Feng Yuanlong Zhao Xinyu Zhao Kuo Hu Qiang Tao Pinwen Zhu Zhihui Li Ran Liu Zhaodong Liu Mingguang Yao Bingbing Liu 

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

出　　处：《Engineering》2025年第2期155-164,共10页工程(英文)

基　　金：supported by the National Key Research and Development Program of China(2022YFB3706600 and 2023YFA1406200);the National Natural Science Founda-tion of China(42272041,52302043,12304015,41902034,and 12011530063);the Jilin University High-level Innovation Team Foundation,China(2021TD-05);the National Major Science Facility Synergetic Extreme Condition User Facility Achievement Transformation Platform Construction(2021FGWCXNLJSKJ01).

摘　　要：Ultrahigh pressure generation at high temperatures is technologically challenging for large sample volumes.In this study,we successfully generated pressures of 37.3-40.4 GPa at 1900-2100 K in a Walker-type large-volume press(LVP).Expansion of the pressure range at high temperatures was achieved by adapting newly designed ZK01F tungsten carbide(WC)anvils with tapered surfaces and using cell assemblies with an^(-1) mm^(3) sample volume and hard materials,as well as by applying certain adjustments to the apparatus.The pressure efficiencies of the different types of WC anvils and cell assemblies were also studied.Using the above-mentioned techniques,we successfully synthesized and characterized bulk samples of nearly pure sp3-hybridized ultrahard amorphous carbon,core-shell nanocrystals with high Néel temperatures,as well as large-sized single crystals of lower-mantle minerals.The developed LVP techniques presented here could enable the exploration of the chemical and physical properties of novel materials and Earth’s interior.

关 键 词：Ultrahigh pressure High temperature Large-volume press Tungsten carbide anvil Novel materials 

分 类 号：P578.2[天文地球—矿物学]