Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 460, Issue 1-2, Pages 320-325Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.06.053
Keywords
amorphous materials; composite materials; sintering; microstructure; mechanical properties
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Mechanically alloyed Al65Cu20Ti15 amorphous alloy powder with or without 10wt% nano-TiO2 dispersion was consolidated by isothermal spark plasma sintering in the range 200-500 degrees C with pressure up to 50 MPa. Selected samples were separately cold compacted with 50 MPa pressure and sintered at 500 degrees C using controlled atmosphere resistance and microwave heating furnaces. Phase and microstructural evolution at appropriate stages of mechanical alloying/blending and sintering was monitored by X-ray diffraction and scanning and transmission electron microscopy. Measurement and comparison of relevant properties (density/porosity, microhardness and yield strength) of the sintered compacts suggest that spark plasma sintering is the most appropriate technique for developing nano-TiO2 dispersed amorphous/nanocrystalline Al65Cu20Ti15 matrix composite for structural application. (C) 2007 Elsevier B.V. All rights reserved.
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