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Synthesis of nanocrystalline copper-tungsten alloys by mechanical alloying

DSpace at IIT Bombay

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Title Synthesis of nanocrystalline copper-tungsten alloys by mechanical alloying
 
Creator RAGHU, T
SUNDARESAN, R
RAMAKRISHNAN, P
MOHAN, TRR
 
Subject cu
mechanical alloying
copper-tungsten
solid solubility
 
Description Copper-tungsten exhibits total absence of solubility in both solid and liquid state. Mechanical alloying (MA) as a solid state, nonequilibrium process can be beneficial to the processing of such an immiscible system with the added features of refinement of structure. A study war undertaken to synthesise various Cu-W alloys and develop an ultrafine microcomposite structure of tungsten in copper matrix by mechanical alloying. Elemental powders of copper and tungsten were milled in high energy ball mills. The milling behaviour was found to depend on the composition milling time and milling atmosphere. The milled powders were characterised for their particle size, microstructure and lattice parameters. Metastable mutual solid solubility in the system was confirmed. Crystallite sizes were found to be in the nanocrystalline regime. The conversion of milling energy effectively to generate deformed surfaces, which in turn led to metastable solid solubility and nanocrystalline structure, was aided by the presence of oxygen in the milling atmosphere, (C) 2001 Elsevier Science B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-10-23T02:30:05Z
2011-12-15T09:10:59Z
2011-10-23T02:30:05Z
2011-12-15T09:10:59Z
2001
 
Type Article; Proceedings Paper
 
Identifier MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,304,438-441
0921-5093
http://dx.doi.org/10.1016/S0921-5093(00)01444-1
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15023
http://hdl.handle.net/100/1781
 
Source 10th International Conference on Rapidly Quenched and Metastable Materials (RQ10),BANGALORE, INDIA,AUG 23-27, 1999
 
Language English