Microstructure and Mechanical Properties of TiC/Ti sub(3)AlC sub(2) In Situ Composites Prepared by Hot Pressing Method

TiC/Ti sub(3)AlC sub(2) composites were successfully prepared by hot-pressing sintering method from the elemental powder mixtures of Ti, Al and TiC. A possible reaction mechanism was investigated by XRD. The density, Vickers hardness, flexural strength, and fracture toughness of the TiC/Ti sub(3)AlC...

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Published inMaterials science forum Vol. 816; pp. 200 - 204
Main Authors Ruan, Miao Miao, Feng, Xiao Ming, Ai, Tao Tao, Yu, Ning, Hua, Kui
Format Journal Article
LanguageEnglish
Published 01.04.2015
Subjects
Aluminum
Density
Diamond pyramid hardness
Intermetallic compounds
Intermetallics
Modulus of rupture in bending
Titanium
Titanium aluminides
Titanium carbide
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Summary:TiC/Ti sub(3)AlC sub(2) composites were successfully prepared by hot-pressing sintering method from the elemental powder mixtures of Ti, Al and TiC. A possible reaction mechanism was investigated by XRD. The density, Vickers hardness, flexural strength, and fracture toughness of the TiC/Ti sub(3)AlC sub(2) composites were also measured. At 660 [degrees]C, Al melted and reacted with Ti to form TiAl sub(3). At 900 [degrees]C, TiAl sub(3) reacted with TiC and Ti to form Ti sub(2)AlC. At 1100 [degrees]C, Ti sub(2)AlC reacted with TiC to form Ti sub(3)AlC sub(2). Increasing the sintering temperature, the content of Ti sub(3)AlC sub(2) increased. The TiC/Ti sub(3)AlC sub(2) composites had excellent performance after sintered at 1100 [degrees]C, the density, Vickers hardness, flexural strength and fracture toughness of the composite were 4.35 g/cm super(3), 4.72 GPa, 566 MPa and 6.18 MPa times m super(1/2), respectively.
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ISSN:0255-5476
1662-9752
DOI:10.4028/www.scientific.net/MSF.816.200