硼化钽(TaB)高温高压烧结体硬度的研究  

Studies of the hardness for the sintered tantalum boride(TaB)at high temperature and high pressure

作　　者：陈海花[1] 梁浩[2] 谢名财 刘凌霄[1] 郑曙东[1] 

机构地区：[1]青海大学基础部,西宁810016 [2]四川大学原子与分子物理研究所,成都610065

出　　处：《四川大学学报（自然科学版）》2017年第4期835-838,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：青海省科技计划资助项目(2014-ZJ-942);国家自然科学基金(11604175)

摘　　要：采用国产DS6×800T铰链式六面顶压机技术,对过渡金属TaB粉末进行了高温高压烧结,并采用金刚石菱形压痕法对TaB维氏硬度进行了测量.在加载负荷为29.4N时,烧结压力为4GPa,烧结温度分别为900和1100℃时,测试得到TaB陶瓷的硬度分别为7.7±0.4和10.5±0.7GPa.说明在同一压力条件下,温度越高致密性越好,通过阿基米德法,计算得到了TaB的相对密度为13.5g/cm3.Tantalum boride has been sintered under high temperature and high pressure （HTHP） condi- tions by using a DS6 ~ 8 MN cubic press device, and the Vickers hardness of TaB has been measured by using a diamond indentation method. Under the applied load of 29.4 N, our test gave the Vickers hard- ness of TaB are 7.7±0.4 and 10.5±0.7 GPa, at 4 GPa and the temperatures of 900 and 1100 ℃, re- spectively. Our result shows that the density becomes better with the increasing temperature under the same pressure. By using the Archimedes method, we calculated the relative density of 13. 5 g/cm3 for TaB.

关 键 词：硼化钽 高温高压烧结 硬度 相对密度 

分 类 号：O521.3[理学—高压高温物理]