title: Structure, mechanical property and corrosion behaviors of (HA+β-TCP)/Mg-5Sn composite with interpenetrating networks.
abstract: In this paper, a novel (Hydroxyapatite+β-tricalcium phosphate)/Mg-5Sn ((HA+β-TCP)/Mg-5Sn) composite with interpenetrating networks was fabricated by infiltrating Mg-5Sn alloy into porous HA+β-TCP using suction casting technique. The structure, mechanical property and corrosion behaviors of the composite have been evaluated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), mechanical testing, electrochemical and immersion test. It is shown that the molten Mg-5Sn alloy has infiltrated not only into the pores but also into the struts of the HA+β-TCP scaffold to forming a compact composite. The microstructure observation also shows that the Mg alloy contacts to the HA+β-TCP closely, and no reaction layer can be found between Mg-5Sn alloy and scaffold. The ultimate compressive strength of the composite is as high as 176MPa, which is about four fifths of the strength of the Mg-5Sn bulk alloy. The electrochemical and immersion tests indicate that the corrosion resistance of the composite is better than that of the Mg-5Sn bulk alloy. The corrosion products on the composite surface are mainly Mg(OH)2, Ca3(PO4)2 and HA. Appropriate mechanical and corrosion properties of the (HA+β-TCP)/Mg-5Sn composite indicate its possibility for new bone tissue implant materials.
authors.affiliation: Center for Biomedical Materials and Engineering, Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China. Electronic address: wangxiang@hrbeu.edu.cn.
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.affiliation: Center for Biomedical Materials and Engineering, Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China.
authors.forename: J T
authors.initials: JT
authors.lastname: Li
authors.affiliation: Center for Biomedical Materials and Engineering, Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China.
authors.forename: M Y
authors.initials: MY
authors.lastname: Xie
authors.affiliation: Key Lab of Biomedical Materials of University in Heilongjiang Province, Jiamusi University, Jiamusi 154007, China.
authors.forename: L J
authors.initials: LJ
authors.lastname: Qu
authors.affiliation: Center for Biomedical Materials and Engineering, Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China.
authors.forename: P
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Center for Biomedical Materials and Engineering, Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China.
authors.forename: X L
authors.initials: XL
authors.lastname: Li
mesh_terms: D000497:Alloys / Q000737:chemistry*; D018786:Bone Substitutes / Q000737:chemistry*; D002130:Calcium Phosphates / Q000737:chemistry*; D003343:Corrosion; D017886:Durapatite / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D014001:Tin / Q000737:chemistry*
chemical_list: D000497:Alloys; D018786:Bone Substitutes; D002130:Calcium Phosphates; C485817:beta-tricalcium phosphate; D014001:Tin; D017886:Durapatite; D008274:Magnesium
keywords: (HA+β-TCP)/Mg–5Sn; Composite; Corrosion behavior; Mechanical property; Structure