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Development of titanium based biocomposite by powder metallurgy processing with in situ forming of Ca-P phases

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Title Development of titanium based biocomposite by powder metallurgy processing with in situ forming of Ca-P phases
 
Creator KARANJAI, M
SUNDARESAN, R
RAO, GVN
MOHAN, TRR
KASHYAP, BP
 
Subject hydroxyapatite coatings
titanium
calcium
phosphorus
hydroxylapatite
biocomposite
load bearing implants
 
Description Composites of titanium and calcium-phosphorus phases were developed by powder metallurgy processing and evaluated for bioactivity. Titanium hydride powder and precursors of calcium and phosphorus in the form of calcium carbonate and di-ammonium hydrogen orthophosphate were mixed in different proportions, compacted and calcined in different atmospheres. The calcined compacts were subsequently crushed, recompacted and sintered in vacuum. In situ formation of bioactive phases like hydroxylapatite, tricalcium phosphate and calcium titanate during the calcination and sintering steps was studied using X-ray diffraction. The effect of calcination atmosphere on density, interconnected porosity, phase composition and modulus of rupture of sintered composites was examined. The sintered composites were immersed in simulated body fluid for 7 days to observe their in vitro behaviour with XRD and FTIR spectroscopic identification of deposits. Composites with 10 wt% precursors sintered from vacuum calcined powder gave the best results in terms of bioactive phases, density and strength. (c) 2006
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-27T19:06:46Z
2011-12-26T12:58:03Z
2011-12-27T05:47:05Z
2011-07-27T19:06:46Z
2011-12-26T12:58:03Z
2011-12-27T05:47:05Z
2007
 
Type Article
 
Identifier MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 447(1-2), 19-26
0921-5093
http://dx.doi.org/10.1016/j.msea.2006.10.154
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7304
http://hdl.handle.net/10054/7304
 
Language en