Nanostructured Bulk Polycrystal LaB6 Cathode Prepared by in-Situ Spark Plasma Sintering

被引：0
|
作者：
Zhou Shenlin [1 ]
Liu Danmin [1 ]
Zhang Jiuxin [1 ]
Jin Shuai [1 ]
机构：
[1] Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Beijing 100022, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2009年 / 38卷 / 02期
关键词：
spark plasma sintering (SPS); LaB6; polycrystal; nanostructure bulk; hot cathode; FIELD;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to obtain LaB6 cathode with high-purity and excellent properties, La and LaH2 nanopowders were prepared by hydrogen arc plasma method, and then La-LaH2 and B nanopowders were sintered to fabricate the high-purity LaB6 polycrystal nano-bulk cathode by in situ SPS (Spark Plasma Sintering) in a oxygen free system. The effects of sintering temperature and pressure on the phases, microstructure and properties of the nano-bulk were systematically studied. The results show that the single-phase LaB6 was formed in the nano bulk with a high purity of 99.867% and an average crystal size of about 120 nm. The relative densities of nano-bulk LaB6 is up to 99.2%, and its hardness is up to 17.4 GPa, the bend strength of the polycrystal LaB6 is as high as around 245.6 MPa, the theoretical bend strength value of single crystal.
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页码：313 / 317
页数：5
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