Improvement of MoSi2 oxidation resistance via boron addition: Fabrication of MoB/MoSi2 composite by mechanical alloying and subsequent reactive sintering

被引：42

作者：

Taleghani, P. R. ^{[1
]}

Bakhshi, S. R. ^{[1
]}

Erfanmanesh, M. ^{[1
]}

Borhani, G. H. ^{[1
]}

Vafaei, R. ^{[1
]}

机构：

[1] Malek Ashtar Univ Technol, Dept Mat Engn, Shahin Shahr, Isfahan, Iran

来源：

POWDER TECHNOLOGY | 2014年 / 254卷

关键词：

Mechanical alloying; Oxidation kinetics; MoB/MoSi2; composite; Borosilicate scale; SI-B ALLOYS; HOT-PRESSED MOSI2; COMBUSTION SYNTHESIS; BEHAVIOR; MICROSTRUCTURE; WEAR;

D O I：

10.1016/j.powtec.2014.01.034

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The purpose of this study is to determine the influence of boron addition on the oxidation resistance of MoSi2. Powder mixtures of Mo-Si with stoichiometric ratio of 1:2 and 30Mo-47Si-23B (at.%) were used, respectively to produce MoSi2 and MoB/MoSi2. First powder mixtures were separately milled for 20 h in an attritor ball mill. After degassing of as-mechanically alloyed powders at 450 degrees C, the powders were pressed into cylindrical samples under a pressure of 600 MPa. The final diameter of samples were 15 mm. Compacted samples were sintered in tube resistance furnace using Ar controlled atmosphere. 30Mo-47Si-23B alloy with a MoB/MoSi2 two-phase structure and monolithic MoSi2 were obtained by sintering at 1300 degrees C for 3 h and 1100 degrees C for 7 h, respectively. The sintered alloys were subjected to high temperature continuous oxidation test at 1000 degrees C. Microstructure of sintered alloys and as-mechanically alloyed powders, phase composition of sintered and oxidized samples were evaluated by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The results showed that in 30Mo-47Si-23B alloy no pest disintegration is observed. The presence of boron acted as an effective barrier against oxygen diffusion during oxidation test of MoB/MoSi2 composite. Excellent oxidation resistance of MoB/MoSi2 composite was achieved through homogeneously distributed and fine grained microstructure and also very high relative density. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：241 / 247

页数：7

共 50 条

[21] Effect of Al and Cr alloying by arc cladding on the high-temperature oxidation resistance of MoSi2 materials [J].

Wang, Bin ;

Sun, ShunPing ;

Wang, HongJin ;

Li, XiaoPing ;

Lei, WeiNing .

MATERIALS RESEARCH EXPRESS, 2021, 8 (08)

[22] Synthesis and Characterization of Nanocrystalline MoSi2 by Mechanical Alloying and Heat Treating [J].

Mohammad Erfanmanesh ;

Saeed Reza Bakhshi .

Journal of Cluster Science, 2013, 24 :133-143

[23] Structure evolution and thermodynamics analysis of MOSi2 during mechanical alloying [J].

Zuo, Kesheng ;

Xi, Shengqi ;

Zhou, Jing'en .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 445 :48-53

[24] Influence of different coating structures on the oxidation resistance of MoSi2 coatings [J].

Liu, L. ;

Zhang, H. Q. ;

Lei, H. ;

Li, H. Q. ;

Gong, J. ;

Sun, C. .

CERAMICS INTERNATIONAL, 2020, 46 (05) :5993-5997

[25] Dense SiCf/MoSi2 composite via liquid silicon infiltration [J].

Huang, Minzhong ;

Wang, Qi ;

Li, Siwei ;

Chen, Lifu ;

Xiao, Hongrui ;

Su, Xiaohui .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2019, 102 (10) :5716-5724

[26] Fabrication of MoSi2 Nanocrystal by Mechanical Alloying Large Particle-sized Starting Powders [J].

Luo Junting .

HIGH-PERFORMANCE CERAMICS VI, 2010, 434-435 :768-770

[27] The effect of 15 wt% Mo addition on the microstructure and mechanical properties of MOSi2 composite [J].

Zhang Xiaoli ;

Feng Yaorong ;

Jin Zhihao ;

Zhao Wenzhen ;

Lu Zhenlin ;

Huo Chunyong .

RARE METAL MATERIALS AND ENGINEERING, 2006, 35 (09) :1453-1456

[28] Improvement of "Pest" Resistance of MoSi2 Intermetallic Compound at 500 °C and 600 °C via Addition of B Fabricated by Spark Plasma Sintering [J].

Wen, S. H. ;

Sha, J. B. .

OXIDATION OF METALS, 2019, 92 (3-4) :243-257

[29] Mechanical alloying of MoSi2 with ternary alloying elements.: Part 2 -: computer simulation [J].

Heron, AJ ;

Schaffer, GB .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 359 (1-2) :319-325

[30] Oxidation resistance comparison of MoSi2 and B-modified MoSi2 coatings on pure Mo prepared through pack cementation [J].

Tian, X. D. ;

Guo, X. P. ;

Sun, Z. P. ;

Qu, J. L. ;

Wang, L. J. .

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION, 2015, 66 (07) :681-687

← 1 2 3 4 5 →