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Microstructure and Reaction Mechanism of Multi-Laminated Ti-(SiCp/Al) Composites Subjected to Annealing at 1300°C

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Abstract:

The multi-laminated Ti-(SiCp/Al) composite was produced by hot press and subsequent hot roll bonding of Ti and SiCp/Al foils. The microstructure evolution of the composite in reaction annealing was investigated by scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometer (EDX) and X-ray diffractometer (XRD). The results show that after the reaction annealing at 1300°C for 3h, the Ti and SiCp/Al foils were completely consumed and transformed into the TiAl composite with a microlaminated structure. The microlaminated microstructure of the composite is composed of Ti3Al/(TiAl+Ti5Si3p)/Ti5Si3/duplex-phase (TiC+Ti3AlC) layers. The reaction mechanism is elucidated by employing the reaction model.

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Periodical:

Materials Science Forum (Volume 762)

Pages:

526-530

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.762.526

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Online since:

July 2013

Authors:

Jin Cheng Pang, Lin Geng, G.H. Fan, A.B. Li, Jie Zhang, Zhen Zhu Zheng, X.P. Cui, Q.W. Wang

Keywords:

Composite, Microlaminated Microstructure, Reaction Annealing, TiAl Alloys

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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