力学结构及末级压砧硬度对八面体压腔高压发生效率的影响  

Influence of mechanical conflguration and hardness of last stage anvil on high pressure producing efficiency for octahedral cell

作　　者：管俊伟[1] 贺端威[1] 王海阔[1] 彭放[1] 许超[1] 王文丹[1] 王凯雪[1] 贺凯[1] 

机构地区：[1]四川大学原子与分子物理研究所,高压科学与技术实验室,成都610065

出　　处：《物理学报》2012年第10期93-99,共7页Acta Physica Sinica

基　　金：国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(批准号:10976018);国家自然科学基金科学仪器基础研究专项(批准号:11027405)资助的课题~~

摘　　要：针对大腔体静高压装置中的多级八面体压腔,分析了两种不同加载结构的力的传递,建立了高压发生效率的力学关系.室温下,采用定点标压法(Bi,ZnTe,ZnS,GaAs)分别标定了14/8,12/6和10/4三种二级6-8型大腔体静高压组装的腔体压力,定量地讨论了力学结构和末级压砧硬度对八面体压腔高压发生效率的影响.实验结果表明,力学结构和末级压砧硬度都是影响高压发生效率的重要因素,且力学结构对高压发生效率的影响更大.其中,腔体的几何结构越大,高压发生效率越高;6-8型加载结构的高压发生效率高于2-6-8型加载结构;在八面体压腔内的压力接近末级压砧的维氏硬度时,末级压砧硬度越大,高压发生效率越高,所能获得的腔体压力越大.We analyse the loading force transmissions for two kinds of loading structures directed at multistage octahedral cell of high pressure device, and build a mechanical relationship for high pressure producing efficiency. The relationship between cell pressure and hydraulic load is calibrated at room temperature for 14/8, 12/6 and 10/4 cell assemblies using the phase transitions of Bi, ZnTe, ZnS and GaAs under high pressure. Also we discuss qualitatively the influences of both mechanical configuration and hardness of last stage anvil on high pressure producing efficiency of octahedral ceil. The experimental results show that both mechanical configuration and hardness of last stage anvil are key factors for affecting high pressure producing efficiency, what is more, the mechanical configuration is more important. The larger the geometry configuration of octahedral cell, the higher the high pressure producing efficiency is; high pressure producing efficiency of 6-8 type loading configuration is higher than that of 2-6-8 type loading configuration; when the pressure of octahedral cell approaches to Vickers hardness of last stage anvil, the harder the last stage anvil, the higher the high pressure producing efficiency and the higher cell pressure is.

关 键 词：力学结构 加载结构 高压发生效率 

分 类 号：TQ164[化学工程—高温制品工业]