Microstructure and performance of rare earth element-strengthened plasma-facing tungsten material

被引：28

作者：

Luo, Laima ^{[1
,2
]}

Shi, Jing ^{[1
]}

Lin, Jinshan ^{[1
]}

Zan, Xiang ^{[1
,2
]}

Zhu, Xiaoyong ^{[1
,2
]}

Xu, Qiu ^{[3
]}

Wu, Yucheng ^{[1
,2
]}

机构：

[1] Hefei Univ Technol, Sch Materials Sci & Engn, Hefei 230009, Peoples R China

[2] Natl Local Joint Engn Res Ctr Nonferrous Met & Pr, Hefei 230009, Peoples R China

[3] Kyoto Univ, Res Reactor Inst, Osaka 5900494, Japan

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

中国国家自然科学基金;

关键词：

MECHANICAL-PROPERTIES; HELIUM;

D O I：

10.1038/srep32701

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Pure W and W-(2%, 5%, 10%) Lu alloys were manufactured via mechanical alloying for 20 h and a spark plasma sintering process at 1,873 K for 2 min. The effects of Lu doping on the microstructure and performance of W were investigated using various techniques. For irradiation performance analysis, thermal desorption spectroscopy (TDS) measurements were performed from room temperature to 1,000 K via infrared irradiation with a heating rate of 1 K/s after implantations of He+ and D+ ions. TDS measurements were conducted to investigate D retention behavior. Microhardness was dramatically enhanced, and the density initially increased and then decreased with Lu content. The D retention performance followed the same trend as the density. Second-phase particles identified as Lu2O3 particles were completely distributed over the W grain boundaries and generated an effective grain refinement. Transgranular and intergranular fracture modes were observed on the fracture surface of the sintered W-Lu samples, indicating some improvement of strength and toughness. The amount and distribution of Lu substantially affected the properties of W. Among the investigated alloy compositions, W-5% Lu exhibited the best overall performance.

引用

页数：9

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