Formation mechanism of nano-strengthening particles in dispersion strengthened W-Ti Alloys

被引：0
|
作者：
Noto H. [1 ]
Hishinuma Y. [1 ]
Muroga T. [1 ]
Benoki H. [2 ]
机构：
[1] National Institute for Fusion Science, Toki, Gifu
[2] Nippon Tungsten Co., Ltd., Saga
来源：
Plasma and Fusion Research | 2020年 / 15卷
关键词：
Dispersion strengthening; Divertor; Hot isostatic pressing; Mechanical alloying; Plasma-facing material; Tungsten;
D O I：
10.1585/PFR.15.1205021
中图分类号：
学科分类号：
摘要：
The realization of advanced fusion reactors rests upon improvements of plasma-facing materials for divertors. The toughness of tungsten is a critical issue for these improvements. As a solution, we developed dispersionstrengthened (DS) W-Ti alloys using a new process which is based on a combination of mechanical alloying (MA) and hot isostatic pressing. In this paper, the microstructure of new DS-W-Ti alloys and the formation mechanism of nano-strengthening particles are investigated. The produced DS-W-Ti alloys are dispersed with TiO2. The chemical analysis shows that new precipitation processes occurred during the MA based on redox reactions between carbon and oxygen. © 2020 The Japan Society of Plasma Science and Nuclear Fusion Research.
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