Mechanically alloyed Mo-Si-B alloys with a continuous α-Mo matrix and improved mechanical properties

被引：137

作者：

Krueger, M. ^{[1
]}

Franz, S. ^{[1
]}

Saage, H. ^{[1
]}

Heilmaier, M. ^{[1
]}

Schneibel, J. H. ^{[2
]}

Jehanno, P. ^{[3
]}

Boening, M. ^{[3
]}

Kestler, H. ^{[3
]}

机构：

[1] Otto von Guericke Univ, Inst Werkstoff & Fugetech, D-39016 Magdeburg, Germany

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[3] Plansee SE, Technolzentrum, A-6600 Reutte, Austria

来源：

INTERMETALLICS | 2008年 / 16卷 / 07期

关键词：

molybdenum silicides; brittleness and ductility; mechanical alloying and milling; microstructure; aero-engine components;

D O I：

10.1016/j.intermet.2008.04.015

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：

Mechanical alloying (MA) followed by cold isostatic pressing (CIPing), sintering and hot isostatic pressing (HIPing) was used to prepare Mo-base silicide alloys consisting of a Mo(Si) solid solution and the intermetallic phases Mo3Si and Mo5SiB2. The microstructural development during milling of both binary Mo-Si and Mo-B and ternary Mo-Si-B powder mixtures was evaluated. While obtaining a supersaturated solid solution requires rather long milling times, domain size (which correlates with the grain size) is reduced to below 100 angstrom after about 10 h of milling. After heat treatment and consolidation the microstructure reveals a continuous alpha-Mo matrix with embedded, uniformly distributed intermetallic particles. The establishment of such a microstructure is beneficial for the mechanical properties since, as compared to a discontinuous alpha-Mo matrix, it decreases the brittle-to-ductile transition temperature (BDTT) by about 150 K. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：933 / 941

页数：9

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