Preparation and study of the physical and mechanical properties for hydroxyapatite-titanium and zirconia nanoparticle.

In this paper, a bio-ceramics were prepared, which is hydroxyapatite from natural sources. It was obtained by calcination the bovine bone at a temperature of (750 ° C) for three hours, after which the milling and sifting operations were performed to obtain the hydroxyapatite nano composite, as the results of the Atomic Force Microscopy Technique showed that the average grain size is (60.4nm). It has been identified by the technique of X-ray diffraction. The results of the X-ray fluorescence technique found that the molar ratio of calcium to phosphorous (Ca: P=1.67), which is compatible with normal proportions in bones and teeth. Powder technology was used to prepare a bio-ceramic compound consisting of hydroxyapatite that was mixed with Titanium and nanostructured zirconia according to different weight ratios using an Ultrasonic Cleaner. Sintering of the prepared solid phase samples (1350 ° C) was performed for 3 hours. We found through the results of the physical examinations that the highest value of the bulk density is (2.949 g/cm3), which is consistent with the normal density in adult bones of approximately (2,982 g / cm3). Also, the apparent porosity ratio is directly proportional to the water absorption rate, which in turn increases with the increase in the added proportions of Titanium and Zirconia. The diagonal shrinkage and volume decrease with increasing the proportion of Titanium and Zirconia added to hydroxyapatite. Mechanical tests also showed good properties, as the compressive strength was highest when the ratios of titanium and zirconia were 20% and it was equal to (122.84 MPa). Also, samples prepared from hydroxyapatite alone showed the highest value of Vickers microstructure and was equal to (413.1MPa).The samples prepared with a scanning electron microscope technique were also photographed to study the surface topography and its internal structure. [ABSTRACT FROM AUTHOR]