Ahmad, Zohaib  <br/><br/>
Development And Characterization Hydroxyapatite/Alumina Bio-Composite using Powder Metallurgy / 
Zohaib Ahmad 
 - 139p.  Soft Copy  30cm 
<br/><br/> This study focused on the preparation of Hydroxyapatite (HAP) and Alumina (Al2O3)<br/>biocomposite using the powder metallurgy (PM) technique. HAP is an osteoconductive<br/>material with good biocompatibility, widely used in biomedical applications. However, it<br/>has a major drawback, it shows poor mechanical properties, due to which it limits its use<br/>in biomedical load-bearing applications such as orthopedic implants. The objective of this<br/>study was to create a new material for load-bearing biomedical applications that has a<br/>relatively low modulus, sufficient strength, and excellent biocompatibility. This led to the<br/>development of the HAP-Alumina bio-composite, which exhibits both good mechanical<br/>properties and good osteoconductivity. The microstructure analysis and mechanical testing<br/>of the sintered samples were carried out to evaluate its density, macro hardness fracture<br/>toughness, and compressive strength. The research findings indicate that the mechanical<br/>properties of the composites improve with an increase in the concentration of Al2O3 and<br/>decrease with an increase in the amount of HAP. A predicted model equation using DoE<br/>was also formed. The composite consisting of 55% HAP and 45% Alumina was found to<br/>be optimal for biomedical applications when sintered at 1250°C for 120 minutes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MS Mechanical Engineering      
<br/><br/><label>Dewey Class. No.: </label>621