Manufacturing of self-passivating W-Cr-Si alloys by mechanical alloying and HIP

被引：35

作者：

Lopez-Ruiz, P. ^{[1
]}

Koch, F. ^{[2
]}

Ordas, N. ^{[1
]}

Lindig, S. ^{[2
]}

Garcia-Rosales, C. ^{[1
]}

机构：

[1] CEIT & Tecnun Univ Navarra, E-20018 San Sebastian, Spain

[2] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany

来源：

FUSION ENGINEERING AND DESIGN | 2011年 / 86卷 / 9-11期

基金：

欧盟地平线“2020”;

关键词：

Tungsten alloys; Mechanical alloying; HIP; Oxidation resistance; Armor material; PLASMA-FACING MATERIAL; FUSION;

D O I：

10.1016/j.fusengdes.2011.03.107

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Self-passivating tungsten-based alloys may provide a major safety advantage in comparison with pure tungsten, which is presently the main candidate material for the plasma-facing protection of future fusion power reactors. WCrSi alloys were manufactured by mechanical alloying (MA) and HIP at 1300 degrees C and 200 MPa for 1 h. Different MA conditions were investigated to obtain powders with lowest possible amount of contaminants and small and homogeneous particle and crystallite size. Milling in WC vials under Ar without process control agent provided best results. After HIP densities close to 100% were obtained. First oxidation tests on preliminary alloys showed self-passivating behavior with rates comparable to WCrSi thin films at 800 degrees C but worse performance at 1000 degrees C. In all cases a Cr(2)WO(6) protective layer is formed at the surface. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1719 / 1723

页数：5

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