Structure of multi-functional calcium phosphates/TiO2 layers deposited on NiTi shape-memory alloy. (17th April 2017)

• Record Type: Journal Article
• Authors: Goryczka, Tomasz; Dudek, Karolina
• Is Part Of: Powder diffraction. Volume 32(2017)Supplement 1
• Page Start: S99
• Page End: S105
• Publication Date: 2017-04-17
• Subjects: X-ray diffraction, -- shape-memory alloy, -- calcium phosphates, -- electrophoresis; Powder metallurgy -- Periodicals; Materials -- Analysis -- Periodicals; 620.1127
• DOI: 10.1017/S0885715617000239
• Languages: English
• ISSNs: 0885-7156

Abstract

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.