Comparison of titanium silicide and carbide reinforced in situ synthesized TiAl composites and their mechanical properties

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Original languageEnglish
Pages (from-to)1236-1242
Journal / PublicationIntermetallics
Issue number8
Publication statusPublished - Aug 2011


This study explored a synthesizing route involving in situ development of reinforcements of titanium silicides in a series of TiAl-based matrices. The main features of this processing route are: (1) Incorporating a small quantity of mechanically alloyed Ti-Al-Si and Ti-Al-Si-C powders, referred to as precursors, into Ti-Al-X (X stands for Cr, Mn, Nb, or their combination) powder mixtures that act as matrices; and (2) Hot isostatic pressing (HIPing) of the cold compacted mixture at a temperature of 1100 °C for 4 h. A series of composites based on different Ti-Al-X matrix were synthesized. The structural evolution in these composites was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The mechanical properties and compression tests at room and elevated temperatures (600 °C and 800 °C) have been investigated. In addition, the influence of alloying elements in the matrix has been evaluated from their stress-strain responses. © 2011 Elsevier Ltd. All rights reserved.

Research Area(s)

  • A. Intermetallics, B. Mechanical properties at high temperatures, C. Mechanical alloying and milling, F. X-ray diffraction (XRD)