Reaction Synthesis of TiAl-Al2O3 Composites from Ti-Al-Cr2O3

Jian Feng Zhu; Wen Wen Yang; Fang Ni Du

doi:10.4028/www.scientific.net/AMR.211-212.209

Paper Titles

Finite Element Analysis of Diesel Engine Cylinder Head Stress and Deformation with Thermal-Mechanical Coupling
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Investigation of Roll Pass Optimal Design Based on IGA
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Study on Modal Shape of the Vibration of an Axially Moving Cantilever Beam with Tip Mass
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Effect of TiO₂ Addition on the Microstructures and Mechanical Properties of γ-TiAl Intermetallics
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Reaction Synthesis of TiAl-Al₂O₃ Composites from Ti-Al-Cr₂O₃
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Synthesis and Luminescent Properties of Eu³⁺ Doped Double Molybdate Phosphors
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Damage Mechanism of Plain Weave C/SiC Composites Subjected to Quasi-Static Indentation Loading
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Thermal Deformation in a Dry Gas Seal
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Analysis the Bamboo Resources Distribution and its Processing Technology in Hunan Province
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 211-212Reaction Synthesis of TiAl-Al2O3 Composites from...

Reaction Synthesis of TiAl-Al₂O₃ Composites from Ti-Al-Cr₂O₃

Abstract:

Titanium aluminide composite reinforced with in situ formed submicron Al₂O₃ has been prepared by a reactive hot press method using Cr₂O₃, Al and Ti powder as starting materials. The reaction synthesis processing is particularly investigated. Results show that the matrix of the as-prepared material is a mixture of TiAl and a small amount of Ti₃Al and Cr containing phase. Fine Al₂O₃ particles that act as reinforcing phase are dispersed along the interface of the matrix. The formation of TiAl/Al₂O₃ composite involves many transitional stages. Firstly, TiAl₃ and Ti₃Al intermediates were produced, then reducing reaction of Cr₂O₃ by Al formed Al₂O₃, and finally, the competitive solid-state diffusing reactions among Ti₃Al, TiAl and TiAl₃ produced the matrix phases of the TiAl/Al₂O₃ composite.