Corrosion properties in a simulated body fluid of Mg/β-TCP composites prepared by powder metallurgy

• Published in: International journal of minerals, metallurgy and materials metallurgy and materials, 2012-11, Vol.19 (11), p.1040-1044
• Main Authors: Wang, Yong, Wu, Ze-hong, Zhou, Hong, Liao, Zhi-dong, Zhang, Heng-fei
• Format: Article
• Language: English
• Subjects: Biomedical materials; Body fluids; Calcium phosphates; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Corrosion; Corrosion and Coatings; Corrosion rate; Electrochemistry; Glass; Hydroxyapatite; Magnesium; Materials Science; Metal matrix composites; Metallic Materials; Metallurgy; MMC; Natural Materials; Powder metallurgy; SBF; Surfaces and Interfaces; Thin Films; Tribology; X-ray spectroscopy; X射线能谱分析; 扫描电子显微镜; 模拟体液; 粉末冶金; 腐蚀性能; 镁基复合材料
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-012-0667-2

Magnesium matrix composites （MMC） reinforced with 5wt% tricalcium phosphate （TCP） particles were prepared by powder metallurgy. Pure magnesium （CP-Mg） was fabricated by the same procedure for comparison. Scanning electron microscopy and en- ergy-dispersive X-ray spectroscopy analyses revealed that TCP particles were distributed homogeneously in the MMC. In order to investi- gate the corrosion properties, MMC samples were immersed in a simulated body fluid （SBF） at 310~0.5 K for 72 h. The mass loss of the samples in SBF and the pH values of the SBF were evaluated. Moreover, electrochemical measurements were conducted in the SBF. It was shown that the corrosion rate of the MMC decreased with the addition of TCP compared with CP-Mg. Hydroxyapatite was formed on the surface of MMC samples after immersion in the SBF for 72 h but not on the surface of CP-Mg.