Microstructure control of Mo-Si-B alloy for formation of continuous α-Mo phase

被引：20

作者：

Byun, Jong Min ^{[1
]}

Hwang, Seok Hyun ^{[1
]}

Lee, Seong ^{[2
]}

Suk, Myung-Jin ^{[3
]}

Oh, Sung-Tag ^{[4
]}

Kim, Young Do ^{[1
]}

机构：

[1] Hanyang Univ, Dept Mat Sci & Engn, Seoul 133791, South Korea

[2] Agcy Def Dev, Daejeon 305600, South Korea

[3] Kangwon Natl Univ, Dept Mat & Met Engn, Samcheok 245711, South Korea

[4] Seoul Natl Univ Sci & Technol, Dept Mat Sci & Engn, Seoul 139743, South Korea

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2015年 / 53卷

关键词：

Mo-Si-B alloys; Superalloys; Core-shell intermetallic powder; Pressureless sintering; POWDER;

D O I：

10.1016/j.ijrmhm.2015.03.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Mo-Si-B alloy has been in the spotlight as a promising alternative to Ni-based superalloys due to its superior thermal resistance and mechanical properties. In particular, the mechanical properties of the Mo-Si-B alloy are sensitively influenced by the mutual distribution of the ductile alpha-Mo phase and brittle intermetallic compound phases such as Mo5SiB2 (T2) and Mo3Si (A15). For the Mo-Si-B alloy to possess an excellent fracture toughness, ductile alpha-Mo phase should form a continuous phase with the uniformly distributed intermetallic compound phases. In this study, a core-shell intermetallic powder composed of nano-sized alpha-Mo particles surrounding intermetallic compound particles was fabricated using Mo-Si-B intermetallic compound powders prepared through the mechano-chemical method and the chemical vapor transport (CVT) process of Mo oxide powder. Also, the Mo-Si-B alloy, which has a continuous alpha-Mo phase uniformly embedded by intermetallic compound phases, was fabricated by the pressureless sintering of the core-shell intermetallic powder. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：61 / 65

页数：5

共 15 条

[1] Mo-Si-B alloys: Developing a revolutionary turbine-engine material [J].

Dimiduk, DM ;

Perepezko, JH .

MRS BULLETIN, 2003, 28 (09) :639-645

[2]

German R.M., 1996, SINTERING THEORY PRA

[3] Fabrication of Mo-Si-B intermetallic powder by mechano-chemical process [J].

Hwang, Seok Hyun ;

Byun, Jong Min ;

Lee, Seong ;

Suk, Myung-Jin ;

Oh, Sung-Tag ;

Kim, Young Do .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 585 :418-422

[4] Mechanically alloyed Mo-Si-B alloys with a continuous α-Mo matrix and improved mechanical properties [J].

Krueger, M. ;

Franz, S. ;

Saage, H. ;

Heilmaier, M. ;

Schneibel, J. H. ;

Jehanno, P. ;

Boening, M. ;

Kestler, H. .

INTERMETALLICS, 2008, 16 (07) :933-941

[5] Fracture and fatigue resistance of Mo-Si-B alloys for ultrahigh-temperature structural applications [J].

Kruzic, JJ ;

Schneibel, JH ;

Ritchie, RO .

SCRIPTA MATERIALIA, 2004, 50 (04) :459-464

[6] Optical properties of molybdenum oxide thin films deposited by chemical vapor transport of MoO3(OH)2 [J].

Lee, Young Jung ;

Seo, Young Ik ;

Kim, Se-Hoon ;

Kim, Dae-Gun ;

Kim, Young Do .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2009, 97 (01) :237-241

[7] Deformation of a multiphase Mo-9.4Si-13.8B alloy at elevated temperatures [J].

Nieh, TG ;

Wang, JG ;

Liu, CT .

INTERMETALLICS, 2001, 9 (01) :73-79

[8] Liquidus projection for the Mo-rich portion of the Mo-Si-B ternary system [J].

Nunes, CA ;

Sakidja, R ;

Dong, Z ;

Perepezko, JH .

INTERMETALLICS, 2000, 8 (04) :327-337

[9] The Hotter the Engine, the Better [J].

Perepezko, John H. .

SCIENCE, 2009, 326 (5956) :1068-1069

[10] Transient oxidation of Mo-Si-B alloys: Effect of the microstructure size scale [J].

Rioult, F. A. ;

Imhoff, S. D. ;

Sakidja, R. ;

Perepezko, J. H. .

ACTA MATERIALIA, 2009, 57 (15) :4600-4613

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