Synthesis of Al2O3/TiAl In Situ Composites from Ti-Al-TiO2-Cr-V2O5

Kun Zhang; Fen Wang; Jian Feng Zhu

doi:10.4028/www.scientific.net/MSF.724.447

Paper Titles

Thermal Decomposition Characteristics of Mg (NO₃)₂·6H₂O and MgCl₂·6H₂O Composite as Phase Change Material
p.425

Effect of Heat Treatment on Microstructures and Hardness of SiC/Steel Armor Composite
p.431

Inspection of the TFT Devices Using the Low-Energy Electron Beam Emitted from the Microcolumn
p.435

Fast Inspection of Non-Visual Defects in the Wafer Surface Using Two Low-Energy E-Beam Sources
p.439

Synthesis of Al₂O₃/TiAl In Situ Composites from Ti-Al-TiO₂-Cr-V₂O₅
p.447

The Effects of Catchment Materials and Treatment Train on Rainwater Quality in a Rainwater Harvesting System
p.451

Influence of Addition of Waste Glass as a Fluxing Agent on the Bloating Phenomenon of Artificial Aggregates Fabricated from Coal Bottom Ash
p.455

The Relationship between Viscosity and Electrical Conductivity of CaF₂-SiO₂-Al₂O₃-CaO-MgO Slag System
p.460

Failure Analysis of ERW Seam Weld Pipeline in Internal Pressure
p.464

HomeMaterials Science ForumMaterials Science Forum Vol. 724Synthesis of Al2O3/TiAl In Situ Composites from...

Synthesis of Al₂O₃/TiAl In Situ Composites from Ti-Al-TiO₂-Cr-V₂O₅

Abstract:

Al₂O₃/TiAl composites doped with Cr and V₂O₅ were successfully prepared from Ti, Al, TiO₂, Cr and V₂O₅ by in situ hot-pressing. The synthesis process and the microstructures of as-fabricated samples were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the reaction process could be divided into three stages: firstly, Ti reacted with Al to form TiAl₃, then TiO₂and V₂O₅ were reduced by Al to form Al₂O₃, and finally TiAl and Ti₃Al occur from the competitive solid-state diffusion reactions. The as-synthesized composites mainly consist of V and Cr doped matrix phases of γ-TiAl and α₂-Ti₃Al and dispersive Al₂O₃ phase. The in situ formed fine Al₂O₃particles mainly disperse on the boundaries of TiAl. Compression strength shows a peak value of 1096.22 MPa at 7.54 at.% Al₂O₃ content.