TEM Study of the Reaction Interface between an Apatite-Mullite Glass-Ceramic and Ti6Al4V


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Apatite-mullite glass-ceramics have been developed as an alternative to hydroxyapatite for use in vivo as a bioactive, osseoconductive biomedical alloy coating. In the cerammed state, they present a number of advantages including control over dissolution rates and mechanical properties by altering the composition of the parent glass or heat treatment regime. In the present study, a simple sedimentation route was used to coat a biomedical titanium alloy, commonly used for orthopaedic applications. The material was deposited as a glass and cerammed in situ to create a well adheared coating that resisted delamination or cracking. To investigate the nature of the coating-substrate reaction, a number of characterization techniques were used to examine the crystallization behaviour of the glass, the glass-ceramic microstructure, and the interfacial reaction region composition. The presence of products such as titanium silicides and unexpected pores are explained by proposed reaction routes between the titanium and glass coating.



Key Engineering Materials (Volumes 361-363)

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Edited by:

Guy Daculsi and Pierre Layrolle




K. T. Stanton et al., "TEM Study of the Reaction Interface between an Apatite-Mullite Glass-Ceramic and Ti6Al4V", Key Engineering Materials, Vols. 361-363, pp. 269-272, 2008

Online since:

November 2007




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[1] axis of the Ti grain. (E) is of fine grained material consisting of titanium silicides and amorphous material; the upper SAD image is along the.

[100] axis of TiSi2 and the lower along the.

[113] axis of Ti5Si4. (F) has large Ti grains and pores of unknown origin.