CONTROLLING THE BIODEGRADATION RATE OF MAGNESIUM USING SOL-GEL AND APATITE COATINGS
Magnesium is light, biocompatible and has similar mechanical properties to natural bone, so it has the potential to be used as a biodegradable material for orthopedic applications. However, pure magnesium severely corrodes in a physiological environment, which may hinder its use for in vivo applications. Protective coatings are effective method to delay the corrosion of Mg. In this study, sol-gel and hydroxyapatite (HA) coatings were applied onto the surface of pure magnesium substrates using a biomimetic technique. The corrosion rate of surface-treated substrates was tested. It was found that both types of coatings substantially slowed down the corrosion of the substrate, the 60Ca so-gel and HA coating was more effectively than the 100Si so-gel and HA coating in hindering the degradation of the substrate. Thus, the corrosion rate of magnesium implants can be closely tailored by coating sol-gel then coating apatite thereby monitoring the release of magnesium ions into the body.
Magnesium sol-gel hydrozyapatite coating corrosion simulated body fluid
YAJING ZHANG MEI WEI
School of Materials & Metallurgy, Northeastern University Shenyang, 110004, China The Institute of Materials Science, University of Connecticut Storrs, CT, 06269, USA
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1897-1903
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）