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Structure of multi-functional calcium phosphates/TiO2 layers deposited on NiTi shape-memory alloy

Published online by Cambridge University Press:  17 April 2017

Tomasz Goryczka  and
Karolina Dudek
Tomasz Goryczka*
Affiliation:
Institute of Materials Science, University of Silesia, Chorzow, Poland
Karolina Dudek
Affiliation:
Institute of Materials Science, University of Silesia, Chorzow, Poland
*
a)Author to whom correspondence should be addressed. Electronic mail: tomasz.goryczka@us.edu.pl
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Abstract

The structure of the NiTi matrix covered by multi-layer was studied applying X-ray diffraction techniques supported by electron microscopy. Multi-layer was composed from titanium oxide (passivation) followed by mixture of the hydroxyapatite (HAp) and β-tricalcium phosphate (β-TCP) (electrophoresis). Conditions of deposition as well as sintering did not change the nominal ratio of HAp/TCP and saved their original structure. Also, the passivated NiTi matrix and with HAp/TCP-deposited layer did not change structure. However, sintering, done for HAp/TCP consolidation, introduced local differences in the lattice parameter as well as phase composition of the NiTi matrix. In consequence of that, two-steps martensitic transformation occurred in sintered NiTi/TiO2/Hap–TCP composite.

Keywords

X-ray diffractionshape-memory alloycalcium phosphateselectrophoresis
Type
Technical Articles
Information
Powder Diffraction , Volume 32 , Supplement S1 , September 2017 , pp. S99 - S105
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Copyright
Copyright © International Centre for Diffraction Data 2017 

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