The role of surface oxidation on the degradation behavior of biodegradable Mg-RE (Gd, Y, Sc) alloys for resorbable implants. Mater Sci Eng C Mater Biol Appl 2014 Jul 01;40:407-17
Date
05/27/2014Pubmed ID
24857509DOI
10.1016/j.msec.2014.03.055Scopus ID
2-s2.0-84899796907 (requires institutional sign-in at Scopus site) 54 CitationsAbstract
Biodegradable magnesium (Mg) alloys have the potential to replace currently used implants for fixation, thereby eliminating the need for removal surgeries. To achieve a controllable degradation rate, surface oxidation has been proposed as an avenue to reduce the initial degradation. This study aims to investigate the oxidation behavior of binary Mg-rare earth alloys and the effect on biodegradation. Cast Mg-3X alloys (X=Gd, Y, Sc) were prepared and then oxidized in pure oxygen. The oxidation rate was evaluated using TGA and the oxides were further investigated and characterized using SEM, AES and XPS. The effect of oxidation on the degradation rate was investigated by immersion testing in Hanks' solution. The thermodynamics and oxidation kinetics of the alloys are discussed in regard to the obtained results, and it was concluded that the experimental results are in agreement with thermodynamic predictions.
Author List
Brar HS, Berglund IS, Allen JB, Manuel MVAuthor
Josephine Allen PhD, MS Professor in the Pediatrics department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
Absorbable ImplantsAlloys
Corrosion
Gadolinium
Magnesium
Materials Testing
Oxidation-Reduction
Scandium
Thermodynamics
Yttrium
