Spark plasma sintering and mechanical properties of zirconium micro-alloyed tungsten
Spark plasma sintering and mechanical properties of zirconium micro-alloyed tungsten
复制标题
锆钨微合金化的放电等离子烧结及其力学性能
DOI：
10.1016/j.jnucmat.2013.09.045
复制
发表时间：
2014-01-01
影响因子：
3.1
通讯作者：
Liu, C. S.
中科院分区：
文献类型：
--
作者：
Xie, Z. M.;Liu, R.;Liu, C. S.
采用火花等离子烧结法制备了致密纯钨和W-(0.1, 0.2, 0.5, 1.0) wt% Zr合金。所有样品的相对密度约为97%。利用FESEM和TEM分析、拉伸试验和维氏显微硬度测量对样品进行了表征。发现Zr可以捕获钨中的杂质氧，形成纳米级ZrO2颗粒。当Zr添加量从0 wt%增加到0.2 wt%时，室温断裂强度从154 MPa增加到265 MPa，断裂能密度从3.73 × 10(4) J/m(3)增加到9.22 × 10(4) J/m(3)。然而，添加更多的Zr会增加Zr- o颗粒的尺寸，并显著降低钨的断裂强度和韧性。(C) 2013 Elsevier B.V.版权所有
Dense pure tungsten and W-(0.1, 0.2, 0.5, 1.0) wt% Zr alloys were fabricated through spark plasma sintering method. The relative density of all the samples was about 97%. The FESEM and TEM analysis, tensile tests and Vickers micro-hardness measurements were exploited to characterize these samples. It is found that Zr could capture impurity oxygen in tungsten and form nanometer scaled ZrO2 particles. With the increase of Zr addition from 0 to 0.2 wt%, the room-temperature fracture strength increased from 154 MPa to 265 MPa, and the fracture energy density elevated from 3.73 x 10(4) J/m(3) to 9.22 x 10(4) J/m(3). However, more Zr addition would increase the size of Zr-O particles and significantly decrease the fracture strength and toughness of tungsten. (C) 2013 Elsevier B.V. All rights reserved.