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  1. 1 Acta Physica Polonica A

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  1. 1 2016

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  1. 1 Dudek K.

  2. 1 Goryczka T.

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Structure of CaPs Coatings Electrophoretically Deposited on NiTi Shape Memory Alloy

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Dudek K., Goryczka T.
Acta Physica Polonica A
|
2016
|
vol. 130
|
issue 4
1053-1055
EN
The surface of NiTi shape memory alloys applied as long-term implants has been modified by protective calcium phosphates (CaPs) coatings, with the objective of improving the biocompatibility of this material. The calcium phosphates such as hydroxyapatite Ca₅(PO₃)OH (HAP) and β-tricalcium phosphate β-Ca₃(PO₄)₂ (β-TCP) were deposited by electrophoretic deposition. In order to improve the adhesion, the deposited samples were vacuum-sintered at wide range of temperature from 500°C to 1000°C for 2 h. The studies revealed that applied sintering conditions did not change the structure of CaPs. The coatings consisted of HAP with hexagonal structure (P63/m) and β-TCP with rhombohedral structure (R-3c). Changes in lattice parameters for CaPs coatings after deposition and sintering were refined by the Rietveld method.
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