CORROSION RESISTANCE IN 316L+ HAp COMPOSITES
Agata Dudek, Renata Włodarczyk
Quarterly No. 4, 2010 pages 312-316
DOI:
keywords: biomaterials, composites, hydroxyapatite, corrosion resistance
abstract Demand for new materials used in medicine is constantly on the increase. An essential task of material engineering is to satisfy material needs in medicine applications. A number of patients are susceptible to allergies to the used biomaterials or some of their components. Main cause of appearance of these pathologic phenomena is metals and the alloys used in prosthesis. Due to this fact, scientists, doctors and technicians have made a variety of attempts to develop modern materials which would include all biological aspects. Another goal imposed on modern technologies is to provide individual matching of implantation materials with particular applications, as some cases require enhanced mechanical properties while the others call for structure or phase composition. Long-lasting implants (joint prostheses, dental implants), typically made of metals and their alloys, are characterized by improved mechanical properties but low corrosion resistance and biocompatibility. Thus, the attempts should be made to develop materials with enhanced functional properties for application in medicine. One of the methods to obtain these materials is to develop composite-based implants that combine good mechanical properties of metallic material with biotolerance of ceramic materials. During the investigations, combined metallic and ceramic composites 316L+HAp were prepared using powder metallurgy and HP-HT method (High Pressure - High Temperature), with different percentage of addition of ceramic phase. The investigations were focused on testing of microstructure, mechanical properties and corro-sion resistance of the obtained composites in Ringer’s solution.