Effect of high temperature swaging and annealing on the mechanical properties and thermal conductivity of W-Y2O3
Effect of high temperature swaging and annealing on the mechanical properties and thermal conductivity of W-Y2O3
复制标题
高温锻压和退火对W−Y2O3力学性能和导热系数的影响
DOI：
10.1016/j.jnucmat.2015.04.050
复制
发表时间：
2015
影响因子：
3.1
通讯作者：
Luo G. N.
中科院分区：
文献类型：
--
作者：
Xie Z. M.;Liu R.;Miao S.;Zhang T.;Wang X. P.;Fang Q. F.;Liu C. S.;Luo G. N.
研究了放电等离子烧结(SPS)制备的W-1.0wt%Y_2O_3(WY10)合金的力学性能和热导率。锻造后的WY10为圆棒状，平均直径和长度分别为4.6gμm和26.7g∼m，在1300℃下退火1h后仍保持稳定。锻造后的WY10的韧脆转变温度约为200℃，远低于SPS法制备的WY10的韧脆转变温度(500℃)。退火显著提高了室温下的导热系数，从146℃提高到198 W/m·K。此外，总延伸率比未退火态提高了5.7倍。结果表明，锻造和后退火可显著提高合金的强度、塑性和导热系数。
The mechanical properties and thermal conductivity of W–1.0 wt%Y2O3(WY10) alloys prepared by spark plasma sintering (SPS) as well as ordinary sintering followed by swaging and annealing treatment, respectively, were investigated. The grains in the swaged WY10 are of round-bar shape with average diameter and length of 4.6 and 26.7 μm, respectively, which keep stable even after being annealed for 1 h at 1300 °C. The ductile–brittle transition temperature (DBTT) of swaged and annealed WY10 is about 200 °C, much lower than that of WY10 prepared by SPS method (∼500 °C). Annealing significantly improves thermal conductivity from 146 to 198 W/m K at room temperature. In addition, the total elongation is raised by 5.7 times than that of the unannealed one. The results indicate that the strength, ductility and thermal conductivity can be greatly improved by swaging and subsequent annealing.