Consolidation behavior of W-20-40 wt.% Mo nanoalloys synthesized by thermal decomposition method

被引：28

作者：

Sahoo, Prasanta Kumar ^{[1
]}

Srivastava, Suneel Kumar ^{[2
]}

Kamal, Sarika Srinivas Kalyan ^{[1
]}

Durai, Loganathan ^{[1
]}

机构：

[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

[2] Indian Inst Technol, Dept Chem, Inorgan Mat & Polymer Nanocomposite Lab, Kharagpur 721302, W Bengal, India

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2015年 / 51卷

关键词：

W-Mo nanoalloy; Sintering; Vickers hardness; Electrical resistivity; COMPOSITE POWDERS; DENSIFICATION; MICROSTRUCTURE; NANOPARTICLES; ALLOY;

D O I：

10.1016/j.ijrmhm.2015.03.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

W-Mo nanoalloys of variable compositions with average sizes similar to 40 nm were synthesized using a single step soft chemical approach in presence of L-cysteine. FTIR study reveals that L-cysteine binds to the surface of W-Mo nanoalloys via a thiolate linkage, which renders stability with respect to aggregation and growth. As-synthesized W-Mo alloys are found to be amorphous and bcc crystalline peaks developed on annealing at 600 degrees C. In addition, the effect of nanoscale particles on densification behavior of W-Mo alloy has also been investigated. The relative density of W-19.9 wt.% Mo, W-30A wt.% Mo and W-40.2 wt.% Mo alloy compacts sintered at 1600 degrees C is maximum achieved corresponding to 97.5, 98.1 and 98.9% respectively. Further, superior Vickers hardness has been achieved in the sintered specimens compared to those obtained from microcrystalline or mechanically alloyed powders. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：124 / 129

页数：6

共 25 条

[1]

[Anonymous], 2005, ISO65074 4

[2] The effect of sintering temperature on densification of nanoscale dispersed W-20-40%wt Cu composite powders [J].

Ardestani, M. ;

Rezaie, H. R. ;

Arabi, H. ;

Razavizadeh, H. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (05) :862-867

[3]

Banwell C.N., 1994, Fundamentals of molecular spectroscopy

[4] The infrared absorption of amino acid side chains [J].

Barth, A .

PROGRESS IN BIOPHYSICS & MOLECULAR BIOLOGY, 2000, 74 (3-5) :141-173

[5]

Bhattarai J., 2006, J. Nepal Chem. Soc., V21, P19

[6] Studies on the synthesis of a Mo-30 wt% W alloy by non-conventional approaches [J].

Chakraborty, S. P. ;

Banerjee, S. ;

Sanyal, Gopal ;

Bhave, V. S. ;

Paul, Bhaskar ;

Sharma, I. G. ;

Suri, A. K. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 501 (02) :211-217

[7]

Christ B.V., 1999, Handbook of Monochromatic XPS Spectra - The Elements of Native Oxides

[8] Synthesis of ultrafine/nanocrystalline W-(30-50)Cu composite powders and microstructure characteristics of the sintered alloys [J].

Fan, Jinglian ;

Liu, Tao ;

Zhu, Song ;

Han, Yong .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2012, 30 (01) :33-37

[9] Densification and grain growth during sintering of nanosized particles [J].

Fang, Z. Z. ;

Wang, H. .

INTERNATIONAL MATERIALS REVIEWS, 2008, 53 (06) :326-352

[10]

Geyang L., 2001, J VAC SCI TECHNOL B, V19, P94

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