Characterization of sintered titanium/hydroxyapatite biocomposite using FTIR spectroscopy

• Published in: Journal of materials science. Materials in medicine Vol. 20; no. 4; pp. 843 - 850
• Main Authors: Ye, Hezhou, Liu, Xing Yang, Hong, Hanping
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.04.2009; Springer Nature B.V
• Subjects: Biomaterials; Biomedical engineering; Biomedical Engineering and Bioengineering; Biomedical materials; Biophysics; Bones; Ceramics; Chemistry and Materials Science; Composite materials; Composites; Durapatite - chemistry; Fourier transforms; Glass; Materials Science; Natural Materials; Polymer Sciences; Regenerative Medicine/Tissue Engineering; Spectroscopy, Fourier Transform Infrared - methods; Surfaces and Interfaces; Temperature; Thin Films; Tissue engineering; Titanium - chemistry; X-Ray Diffraction; TTCP; Sinter Temperature; Water Vapour Pressure; Calcium Phosphate; Tricalcium Phosphate
• ISSN: 0957-4530; 1573-4838
• DOI: 10.1007/s10856-008-3647-3

Fourier transform infrared (FTIR) spectroscopy was employed to characterize the phase changes of hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 , HA) in a titanium/HA biocomposite during sintering. The effects of sintering temperature and the presence of Ti on the decomposition of HA were examined. It was observed that pure HA was stable in argon atmosphere at temperatures up to 1,200°C, although the dehydroxylation of pure HA was promoted by the increase in sintering temperature. In the Ti/HA system, on the other hand, the presence of Ti accelerated dehydroxylation and the decomposition of HA was detected at a temperature as low as 800°C. Tetracalcium phosphate (Ca 4 P 2 O 9 , TTCP) and calcium oxide (CaO) were the dominant products of the decomposition, but no tricalcium phosphate (Ca 3 (PO 4 ) 2 , TCP) was detected due to phosphorus diffusion and possible reactions during the thermal process. The main decomposed constituents of HA in Ti/HA system at high temperatures (≥1,200°C) would be CaO and amorphous phases.