Corrosion behaviour of hydroxyapatite coatings on AZ31 and AZ91 magnesium alloys by plasma spray
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In the scope of this study, AZ31 and AZ91 magnesium alloys are to be coated with hydroxyapatite by plasma spray to be usedas biodegradable implant material and their in-vitro corrosion behaviors are to be examined. There are a number ofresearches on the production of biodegradable cortical screws and plates used in orthopedic surgery in last decade. Theadvantage of biodegradable implants is that they do not need to be surgically removed. Moreover, the elastic modulus and themechanical properties of magnesium are relatively close to those of the human bone, and this prevents the phenomenon of thehuman bone named “stress shielding. During this study, the hydroxyapatite coating processes, characterizations and corrosionbehaviors of AZ31 and AZ91 will be examined. The aim of this work is to determine the optimal coating conditions formagnesium alloys for biodegradable implants. As a result of the plasma spray coating, the corrosion rate has decreased fromabout 1.2 mm/year to 0.4 mm/year.
Abstract
In the scope of this study, AZ31 and AZ91 magnesium alloys are to be coated with hydroxyapatite by plasma spray to be usedas biodegradable implant material and their in-vitro corrosion behaviors are to be examined. There are a number ofresearches on the production of biodegradable cortical screws and plates used in orthopedic surgery in last decade. Theadvantage of biodegradable implants is that they do not need to be surgically removed. Moreover, the elastic modulus and themechanical properties of magnesium are relatively close to those of the human bone, and this prevents the phenomenon of thehuman bone named “stress shielding. During this study, the hydroxyapatite coating processes, characterizations and corrosionbehaviors of AZ31 and AZ91 will be examined. The aim of this work is to determine the optimal coating conditions formagnesium alloys for biodegradable implants. As a result of the plasma spray coating, the corrosion rate has decreased fromabout 1.2 mm/year to 0.4 mm/year.
참고문헌 (29)
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