title: Microstructure, mechanical property and corrosion behaviors of interpenetrating C/Mg-Zn-Mn composite fabricated by suction casting.
abstract: A novel interpenetrating C/Mg-Zn-Mn composite was fabricated by infiltrating Mg-Zn-Mn alloy into porous carbon using suction casting technique. The microstructure, mechanical properties and corrosion behaviors of the composite have been evaluated by means of SEM, XRD, mechanical testing and immersion test. It was shown that the composite had a compact structure and the interfacial bonding between Mg-Zn-Mn alloy and carbon scaffold was very well. The composite had an ultimate compressive strength of (195 ± 15) MPa, which is near with the natural bone (2-180 MPa) and about 150-fold higher than that of the original porous carbon scaffold, and it still retained half of the strength of the bulk Mg-Zn-Mn alloy. The corrosion test indicated that the mass loss percentage of the composite was 52.9% after 30 days' immersion in simulated body fluid (SBF) at 37 ± 0.5 °C, and the corrosion rates were 0.043 mg/cm(2)h and 0.028 mg/cm(2)h after 3 and 7 days' immersion, respectively. The corrosion products on the composite surface were mainly Mg(OH)2 and hydroxyapatite (HA).
authors.affiliation: Center for Biomedical Materials and Engineering, 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, Harbin Engineering University, Harbin 150001, China.
authors.forename: L H
authors.initials: LH
authors.lastname: Dong
authors.affiliation: School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China.
authors.forename: X L
authors.initials: XL
authors.lastname: Ma
authors.affiliation: Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, China; State Key Laboratory for Turbulence and Complex System and Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: Y F
authors.initials: YF
authors.lastname: Zheng
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D001826:Body Fluids; D002244:Carbon / Q000737:chemistry*; D003343:Corrosion; D006863:Hydrogen-Ion Concentration; D008274:Magnesium / Q000737:chemistry*; D008422:Materials Testing; D008954:Models, Biological; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties; D015032:Zinc / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D002244:Carbon; D008274:Magnesium; D015032:Zinc