Fabrication of laminated Ti/Al2O3 composite by vacuum hot-pressing sintering

Laminated Ti/Al2O3 composite was fabricated by tape casting with close control of thickness (about 200 µm) of Al2O3 and titanium layers. The green tapes of titanium and Al2O3 were prepared at room temperature due to high flexibility and strength. In order to improve the density of green layers, the...

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Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2014/03/01, Vol.122(1423), pp.222-225
Main Authors: WU, Chao, WANG, Zhi, LI, Qinggang, SHI, Guopu, MA, Yan, LIU, Luhao
Format: Article
Language:English
Subjects:
Interfacial reaction
Laminated ceramic composite
Tape casting
Ti/Al2O3
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Summary:Laminated Ti/Al2O3 composite was fabricated by tape casting with close control of thickness (about 200 µm) of Al2O3 and titanium layers. The green tapes of titanium and Al2O3 were prepared at room temperature due to high flexibility and strength. In order to improve the density of green layers, the binder removal temperature range of titanium and Al2O3 layers was investigated by differential scanning calorimeter (DSC/TG). The compact laminated Ti/Al2O3 composite sintered by vacuum hot-pressing at 1450°C for 60 min under pressure of 25 MPa was researched by X-ray diffraction and scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX). The results showed an obvious diffusion region between Al and Ti layers, and the interfacial phases were composed mostly of Ti and Al2O3, together with a little amount of Ti3Al, TiAl and AlTi2, and solid solution of O (AlTiO2). Diffusion line of EDX spectrum indicated that the diffusion distance of dissociated Al3+ in Ti layers was about 5 µm.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.122.222