Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 440, Issue 1-2, Pages 154-157Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2006.09.060
Keywords
mechanical alloying; spark plasma sintering; microstructure
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This study investigates the microstructures and mechanical properties of Ti50Al50 alloys prepared via mechanical alloying (NIA) starting from elemental powders. The process of the spark plasma sintering (SPS) has also been studied. It is found that the nanocrystallization process of the Ti-Al alloy proceeds and the sintering temperature can control the microstructure of alloy. The sintering of the compacts is carried out at the temperatures of 1100-1200 degrees C with a compaction pressure of 30 MPa and a heating rate of 30 degrees C min(-1). Specimens with high densities and approaching the equilibrium state can be obtained in short time by spark sintering than conventional sintering. Such shorter high temperature is important to prevent grain growth. (c) 2006 Elsevier B.V. All rights reserved.
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