Phase stability and microstructure development in hydroxyapatite–mullite system

Phase stability and microstructure development in hydroxyapatite–mullite system

We report here the results of a transmission electron microscopy (TEM) study of hydroxyapatite (HAp)–mullite composites. TEM analysis, in combination with selected-area diffraction pattern analysis, confirms the decomposition of HAp to tricalcium phosphate, irrespective of mullite content. Important...

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Veröffentlicht in:Scripta materialia 2008-06, Vol.58 (12), p.1054-1057
Hauptverfasser: Nath, Shekhar, Biswas, Krishanu, Basu, Bikramjit
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum oxide
Calcium phosphate
Composite
Hydroxyapatite
Liquids
Microstructure
Mullite
Sintering
TEM
Transmission electron microscopy
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Zusammenfassung:We report here the results of a transmission electron microscopy (TEM) study of hydroxyapatite (HAp)–mullite composites. TEM analysis, in combination with selected-area diffraction pattern analysis, confirms the decomposition of HAp to tricalcium phosphate, irrespective of mullite content. Importantly, the presence of sintering liquid residue of tetragonal gehlenite as well as cubic CaO and rhombohedral Al 2O 3 has been observed in the investigated HAp composites. Based on the microstructural characterization, the possible sintering reactions are discussed.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2008.01.045