Experimental assessment of the microstructure evolution and liquidus projection in the Mo-rich Mo-Si-B system

被引：21

作者：

Hasemann, G. ^{[1
,3
]}

Ida, S. ^{[2
]}

Zhu, L. ^{[2
]}

Iizawa, T. ^{[2
]}

Yoshimi, K. ^{[2
]}

Krueger, M. ^{[1
,3
]}

机构：

[1] Forschungszentrum Julich GmbH, Inst Energy & Climate Res, Microstruct & Properties Mat IEK 2, Leo Brand Str 1, D-52425 Julich, Germany

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

[3] Otto von Guericke Univ, Inst Mat & Joining Technol, Univ Pl 2, D-39106 Magdeburg, Germany

来源：

MATERIALS & DESIGN | 2020年 / 185卷

关键词：

Intermetallics; Transition metal alloys and compounds; Microstructure; Scanning electron microscopy; Phase diagrams; BEHAVIOR; STABILITY; ALLOYS; POINT;

D O I：

10.1016/j.matdes.2019.108233

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work is focused on a deeper understanding of the microstructure evolution and the solidification reactions of alloys in the Mo-rich portion of the Mo-Si-B system. A number of 59 alloys were selected from the vicinity of the ternary eutectic point to carefully examine the Mo-rich liquidus surface. Therefore, the microstructural evolution of alloy compositions from different primary solidification areas was taken into account. Their solidification path was evaluated by employing the Alkemade theorem. The result is an experimentally based reassessment of the liquidus projection. Special attention had been payed to the Mo3Si primary solidification area and the Moss-Mo5SiB2-Mo3Si ternary eutectic in the Mo-rich portion of the Mo-Si-B system. It could be shown that the primary Mo3Si phase region is larger as compared to present literature data. The eutectic point could be confirmed to contain 17 +/- 1 at.% silicon and 7.5 +/- 0.5 at.% boron. As the main outcome from the careful investigation of the solidification paths of numerous alloys a reconstructed liquidus projection is presented. (C) 2019 The Authors. Published by Elsevier Ltd.

引用

页数：13