Effect of yttrium doping in tungsten on sinterability and properties as a plasma-facing material

被引：6
|
作者：
Min, Guensik [1 ,2 ]
Oh, Yeonju [1 ,2 ]
Kim, Hwangsun [1 ,2 ]
Shin, Eunjoo [3 ]
Roh, Ki-Baek [4 ]
Kim, Jeongseok [1 ,2 ]
Kwak, Nojun [1 ,2 ]
Kim, Yanghoo [5 ]
Kim, Hyoung Chan [6 ]
Kim, Gon-Ho [4 ]
Han, Heung Nam [1 ,2 ]
机构：
[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea
[2] Seoul Natl Univ, Res Inst Adv Mat, Seoul 08826, South Korea
[3] Korea Atom Energy Res Inst, Neutron Sci Div, Daejeon 34057, South Korea
[4] Seoul Natl Univ, Dept Nucl Engn, Seoul 08826, South Korea
[5] Korea Inst Ind Technol, Gangwon Reg Div, Kangnung 25440, South Korea
[6] Korea Inst Fus Energy, Daejeon 34133, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 953卷
基金：
新加坡国家研究基金会;
关键词：
Tungsten; Oxide dispersion strengthening; Internal oxidation; Spark Plasma Sintering; Irradiation Resistance; Microstructure; MECHANICAL-PROPERTIES; MICROSTRUCTURAL EVOLUTION; COMPOSITE POWDERS; PURE TUNGSTEN; HIGH-FLUX; BEHAVIOR; OXIDE; FABRICATION; NANOINDENTATION; TRANSITION;
D O I：
10.1016/j.jallcom.2023.169961
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Y2O3 is extensively used to fabricate oxide-dispersion-strengthened tungsten to refine grain size, improve thermal stability, and increase high-temperature strength. However, excessive Y2O3 addition weakens the grain-boundary strength, which increases the ductile-to-brittle transition temperature. Therefore, in this study, a small amount of Y-rich precipitates was dispersed in a tungsten matrix through internal oxidation during spark plasma sintering. The phase, morphology, and size of the Y-rich precipitates in the sintered tungsten were characterized by transmission electron microscopy (TEM) and small-angle neutron scat-tering (SANS) analyses. Additionally, the effects of Y doping on sinterability, thermal stability, deuterium irradiation resistance, and mechanical properties were analyzed using Y-free pure tungsten specimens for comparison.(c) 2023 Elsevier B.V. All rights reserved.
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页数：12
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