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Novel materials synthesis by mechanical alloying/milling

Murty, BS and Ranganathan, S (1998) Novel materials synthesis by mechanical alloying/milling. In: International Materials Reviews, 43 (3). pp. 101-141.

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An account is given of the research that has been carried out on mechanical alloying/milling (MA/MM) during the past 25 years. Mechanical alloying, a high energy ball milling process, has established itself as a viable solid state processing route for the synthesis of a variety of equilibrium and non-equilibrium phases and phase mixtures. The process was initially invented for the production of oxide dispersion strengthened (ODS) Ni-base superalloys and later extended to other ODS alloys. The success of MA in producing ODS alloys with better high temperature capabilities in comparison with other processing routes is highlighted. Mechanical alloying has also been successfully used for extending terminal solid solubilities in many commercially important metallic systems. Many high melting intermetallics that are difficult to prepare by conventional processing techniques could be easily synthesised with homogeneous structure and composition by MA. It has also, over the years, proved itself to be superior to rapid solidification processing as a non-equilibrium processing tool. The considerable literature on the synthesis of amorphous, quasicrystalline, and nanocrystalline materials by MA is critically reviewed. The possibility of achieving solid solubility in liquid immiscible systems has made MA a unique process. Reactive milling has opened new avenues for the solid state metallothermic reduction and for the synthesis of nanocrystalline intermetallics and intermetallic matrix composites. Despite numerous efforts, understanding of the process of MA, being far from equilibrium, is far from complete, leaving large scope for further research in this exciting field.

Item Type: Journal Article
Publication: International Materials Reviews
Publisher: Institute of Materials, Minerals and Mining
Additional Information: Copyright of this article belongs to Institute of Materials, Minerals and Mining.
Keywords: Solid-State Amorphization;Glass-Forming Range;Ni-Zr Alloys; Severe Plastic-Deformation;Transition-Metal Alloys; Parameter Phase-Diagram;Quasi-Crystal Formation; Ball-Milling Techniques;Nb-Al Powders;Fe-Si System
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 09 Jun 2011 06:19
Last Modified: 09 Jun 2011 06:19
URI: http://eprints.iisc.ac.in/id/eprint/38176

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