Mechanical and physical characterization of hydroxyapatite/alumina biocomposites produced by the powder metallurgy route for biomedical applications

Materia

article

Mayara Ribeiro Masseli¹  Bruna Horta Bastos Kuffner¹  Lucas Victor Benjamim Vasconcelos¹  Gilbert Silva¹  Daniela Sachs¹ 

[1] Federal University of Itajubá

关键词: Hydroxyapatite;    Alumina;    Powder Metallurgy;    Microstructure;    Mechanical Strength;   

DOI  :  10.1590/S1517-707620210004.1382

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

The hydroxyapatite calcium phosphate based ceramic (Hap) is widely used for bone repair, as it is a biocompatible biomaterial and because it has osteoconductive and osteoinductive properties. However, the low mechanical strength of Hap may limit its applicability. Thus, the present work aims to improve the mechanical properties of Hap, associating it with alumina (Al2O3), using the powder metallurgy technique, which consists in the milling of the precursor powders in a planetary ball mill, uniaxial pressing and sintering. The microstructure and mechanical strength of the sintered samples were evaluated using density, microhardness, compressive strength and wettability tests. It was concluded that the use of Al2O3 in the composite improves the mechanical properties of Hap, while decreases its hydrophilic potential. Thus, the composition with 40% Hap / 60% Al2O3 was considered the best for biomedical applications.

【 授权许可】

CC BY