Thermal stability of in situ synthesized (TiB+La2O3)/Ti composite

  • Li J
  • Wang L
  • Qin J
 et al. 
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Abstract

Thermal stability of in situ synthesized (TiB+La2O3)/Ti composite is investigated. The phase analysis is identified by X-ray diffraction. Microstructure of the melted and forged titanium matrix composites (TMCs) after heat treatment is characterized by means of optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The room temperature tensile properties after an additional thermal exposure at 873K, 923K or 973K for 100h are tested. After the thermal exposure, the strength of specimen increases and ductility decreases. This is attributed to precipitation of ordered α2phase (Ti3Al) and S1(silicide) in the titanium matrix composites after the thermal exposure. © 2011 Elsevier B.V.

Author-supplied keywords

  • Microstructure
  • Reinforcement
  • Tensile properties
  • Thermal stability
  • Titanium matrix composites (TMCs)

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