Characterization of ODS-tungsten microwave-sintered from sol-gel prepared nano-powders
Characterization of ODS-tungsten microwave-sintered from sol-gel prepared nano-powders
复制标题
溶胶-凝胶制备的纳米粉末微波烧结ODS-钨的表征
DOI：
10.1016/j.jnucmat.2013.05.049
复制
发表时间：
2014-07-01
影响因子：
3.1
通讯作者：
Fang, Q. F.
中科院分区：
文献类型：
--
作者：
Liu, R.;Wang, X. P.;Fang, Q. F.
采用溶胶凝胶法和氢还原法合成了纳米级W-1%La2O3和W-1%Y2O3粉末。粉末的平均粒径小于50 nm。采用微波烧结法固结钨样品，并采用相对较低的烧结温度（1500℃）和较短的均热时间（30min）来减少晶粒长大。尺寸分布为10-50 nm的纳米氧化物颗粒均匀分散在钨基体中。微波烧结W-1%La2O3和W-1%Y2O3样品的相对密度、平均晶粒尺寸和维氏显微硬度分别为92.4%和93.6%、1.1和0.7 μm、6.03和4.12 GPa。 W-1%Y2O3 样品比 W-1%La2O3 样品表现出更好的烧结性、更细的晶粒和更高的硬度。 (C) 2013 Elsevier B.V. 保留所有权利。
Nano-sized W-1%La2O3 and W-1%Y2O3 powders were synthesized by sol-gel method followed by hydrogen reduction. The average particle size of the powders is smaller than 50 nm. Microwave sintering method was used for the consolidation of tungsten samples, and a relatively low sintering temperature (1500 degrees C) and short soaking time (30 min) were used to reduce the grains growth. Nano-sized oxide particles with a size distribution of 10-50 nm were homogeneously dispersed in the tungsten matrix. The relative density, average grain size and Vickers micro-hardness of the microwave-sintered W-1%La2O3 and W-1%Y2O3 samples are 92.4% and 93.6%, 1.1 and 0.7 mu m, 6.03 and 4.12 GPa, respectively. The W-1%Y2O3 samples showed better sinterability, finer grains, and higher hardness than the W-1%La2O3 samples. (C) 2013 Elsevier B.V. All rights reserved.