Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13665
Title: Synthesis of nanostructured titanium based intermetallics by mechanical alloying
Authors: ZHANG FAN
Keywords: mechanical alloying, intermetallic compounds, titanium aluminides, nanostructure, grain growth, interfacial reaction
Issue Date: 28-Feb-2004
Source: ZHANG FAN (2004-02-28). Synthesis of nanostructured titanium based intermetallics by mechanical alloying. ScholarBank@NUS Repository.
Abstract: In this project, the formation of nanocrystalline Al3Ti, TiAl, TiN, and Al-TiN composites via mechanical alloying were investigated.Nanocrystalline Al3Ti was successfully fabricated by MA. The interfacial reactions, phase and grain size evolution, both during MA and subsequent heat-treatment were studied in detail. Mechanisms were proposed to explain the phase selection, reaction kinetics and un-usual grain growth phenomenon in this system. Bulk materials originated from MA powders were successfully fabricated by HIPing, with the grain size in the sub-micron range. Mechanical properties of such materials were presented. Enhanced amorphization ability was observed in Ti-58Al system during MA by addition of alloying elements of Nb and Mn. Thermodynamic calculation and theories were applied for better understanding the above phenomenon.Nanocrystalline TiN, and Al-TiN composites were also successfully manufactured by MA via mechanochemical reactions.
URI: http://scholarbank.nus.edu.sg/handle/10635/13665
Appears in Collections:Ph.D Theses (Open)

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