title: Influence of oxide-based sintering additives on densification and mechanical behavior of tricalcium phosphate (TCP).
abstract: In this research, we studied and analyzed the effects of four different oxide-based sintering additives on densification, mechanical behavior, biodegradation and biocompatibility of tricalcium phosphate (TCP) bioceramics. Selective sintering additives were introduced into pure TCP ceramics, in small quantities, through homogeneous mixing, using a mortar and pestle. The consequent powders of different compositions were pressed into cylindrical compacts, uniaxially and sintered at elevated temperatures, 1150 degrees C and 1250 degrees C, separately in a muffle furnace. X-ray powder diffraction technique was used to analyze the phase-purity of TCP after sintering. Hardness of these sintered specimens was evaluated using a Vickers hardness tester. Sintered cylindrical samples were tested under uniaxial compressive loading, as a function of composition to determine their failure strength. Biodegradation studies conducted using simulated body fluid under dynamic environment, revealed that these additives could control the rate of resorption and hardness degradation of TCP ceramics.
authors.affiliation: Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL 32816-2450, USA.
authors.forename: Himesh A
authors.initials: HA
authors.lastname: Bhatt
authors.forename: Samar J
authors.initials: SJ
authors.lastname: Kalita
mesh_terms: D020341:Absorbable Implants; D001672:Biocompatible Materials / Q000737:chemistry*; D001696:Biomechanical Phenomena; D001826:Body Fluids; D002130:Calcium Phosphates / Q000737:chemistry*; D019245:Compressive Strength; D004355:Drug Stability; D006358:Hot Temperature; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D008670:Metals / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry; D033362:Powder Diffraction; D013816:Thermodynamics
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; D008670:Metals; D010087:Oxides; C018392:tricalcium phosphate