Spark plasma sintering to restrict sintering reactions and enhance properties of hydroxyapatite–mullite biocomposites

Herein, we demonstrate how spark plasma sintering (SPS) can be useful in restricting the sintering reactions and faster densification in Hydroxyapatite–Mullite system, which otherwise shows extensive sintering reactions during conventional pressureless sintering, as reported in a recent study [Nath...

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Bibliographic Details
Published in:Ceramics international 2011-09, Vol.37 (7), p.2755-2761
Main Authors: Dubey, Ashutosh Kumar, Sitesh, Geet, Nath, Shekhar, Basu, Bikramjit
Format: Article
Language:English
Subjects:
Cell adhesion
Ceramics
Culture
Densification
Hardness
Hydroxyapatite
Loose powder sintering
Mullite
Sintering
Spark Plasma Sintering
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Summary:Herein, we demonstrate how spark plasma sintering (SPS) can be useful in restricting the sintering reactions and faster densification in Hydroxyapatite–Mullite system, which otherwise shows extensive sintering reactions during conventional pressureless sintering, as reported in a recent study [Nath et al. J. Am. Ceram. Soc. 93 (2010) 1639–1649]. The microstructure of SPSed Hydroxyapatite (HAp)-20 wt% mullite composites was characterized by submicron sized HAp and equiaxed mullite grains. Another important result has been the achievement of higher hardness of 7 GPa, which is much higher than pressureless sintered composites. The cell culture study including cellular viability using MTT analysis establishes good cytocompatibility of SPSed composites.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.04.032