Research on preparation process for the in situ nanosized Zr(Y)O2 particles dispersion-strengthened tungsten alloy through synthesizing doped hexagonal (NH4)0.33•WO3

被引：11

作者：

Xiao, Fangnao ^{[1
,3
]}

Barriere, Thierry ^{[1
]}

Cheng, Gang ^{[2
]}

Miao, Qiang ^{[3
]}

Wei, Shizhong ^{[4
]}

Zuo, Shiwei ^{[3
]}

Huang, Zhimin ^{[5
]}

Xu, Liujie ^{[4
]}

机构：

[1] Univ Bourgogne Franche Comte, FEMTO ST Inst, CNRS, UFC,ENSMM,UTBM,Dept Appl Mech, F-25000 Besancon, France

[2] Univ Orleans, INSA CVL, Univ Tours, LaMe, 3 Rue Chocolaterie,BP 3410, F-41034 Blois, France

[3] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, 29 Yudao St, Nanjing 210000, Peoples R China

[4] Henan Univ Sci & Technol, Natl Joint Engn Res Ctr Abras Control & Molding M, Luoyang 471003, Peoples R China

[5] Xiamen Tungsten Corp Ltd, China Natl R&D Ctr Tungsten Technolog, Xiamen 361000, Fujian, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 843卷

基金：

中国国家自然科学基金;

关键词：

Hydrothermal process; Ammonium tungsten bronze; In situ oxide dispersion strengthening; Zirconia; Spark plasma sintering; SIZE DISTRIBUTION MEASUREMENT; HYDROTHERMAL SYNTHESIS; MECHANICAL-PROPERTIES; HYDROGEN REDUCTION; MICROSTRUCTURE; POWDER; OXIDE; COMPOSITE; BEHAVIOR; FABRICATION;

D O I：

10.1016/j.jallcom.2020.156059

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：

In this article, the in situ nanosized Zr(Y)O-2 particles uniformly distributed in the tungsten alloy was successfully prepared through synthesizing doped alpha-HATB powder and spark plasma sintering process. The processing route involves a molecular-level liquid-liquid doping technique that causes a large number of nanosized particles within tungsten grains. The synthesis mechanism of alpha-HATB and phase evolution were detailedly investigated. Over 75% of W-Zr(Y)O-2 powders particles are less than 3 mu m. The determined S-w values (5.7), coefficient of uniformity C-u (2.3) of the W-0.5% Zr(Y)O-2 doped tungsten are 5.7 and 2.3, respectively, both indicating the narrower size distribution. The average size of Zr(Y)O-2 particles in prepared W alloy are about 250 nm under SEM observation. Through milling of these powders, the particles in W-0.5%Zr(Y)O-2 alloy and 92.25W-4.9Ni-2.1Fe-0.75ZrO(2) can further decrease to less than 100 nm in size, which are 8-10 times smaller than those in the state-of-the-art review. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：16