Synthesis,characterization and biological activity in vitro of FeCrAl(f)/HA asymmetrical biological functionally gradient materials  

作　　者：杨海林 李婧 方华婵 周忠诚 童晓阳 阮建明 

机构地区：[1]State Key Laboratory of Powder Metallurgy (Central South University)

出　　处：《Journal of Central South University》2014年第2期447-453,共7页中南大学学报（英文版）

基　　金：Project(51274247)supported by the National Natural Science Foundation of China;Project(2012BAE06B00)supported by the National High Technology Research and Development Program to China;Project(2011QNZT046)supported by the Fundamental Research Funds of Central South Universities of China;Project supported by Hunan Postdoctoral Scientific Program,China

摘　　要：FeCrAl(f)/HA biological functionally gradient materials(FGMs) were successfully fabricated by the hot pressing technique.Scanning electron microscope(SEM),energy dispersive spectrometer(EDS) and bending strength test machine were utilized to characterize the microstructure,component,mechanical properties and the formation of the Ca-deficient apatite on the surface of these materials.The results indicate that an asymmetrical FeCrAl(f)/HA FGM,consolidating powders prepared by mixing HA with 3%–15%(volume fraction) is successfully prepared.Both of the matrix and FeCrAl fiber are integrated very tightly and bite into each other very deeply.And counter diffusion takes place to some extent in two phase interfaces.The elemental compositions of the FeCrAl(f)/HA FGM change progressively.Ca and P contents increase gradually with immersion time increasing,and thereafter approach equilibrium.The bone-like apatite layer forms on the materials surface,which possesses benign bioactivity,and the favorable biocompatibility can provide potential firm fixation between FeCrAl(f)/HA asymmetrical FGM implants and human bone.FeCrAl（f）/HA biological functionally gradient materials（FGMs） were successfully fabricated by the hot pressing technique.Scanning electron microscope（SEM）,energy dispersive spectrometer（EDS） and bending strength test machine were utilized to characterize the microstructure,component,mechanical properties and the formation of the Ca-deficient apatite on the surface of these materials.The results indicate that an asymmetrical FeCrAl（f）/HA FGM,consolidating powders prepared by mixing HA with 3%–15%（volume fraction） is successfully prepared.Both of the matrix and FeCrAl fiber are integrated very tightly and bite into each other very deeply.And counter diffusion takes place to some extent in two phase interfaces.The elemental compositions of the FeCrAl（f）/HA FGM change progressively.Ca and P contents increase gradually with immersion time increasing,and thereafter approach equilibrium.The bone-like apatite layer forms on the materials surface,which possesses benign bioactivity,and the favorable biocompatibility can provide potential firm fixation between FeCrAl（f）/HA asymmetrical FGM implants and human bone.

关 键 词：hydroxyapatite（HA） FeCrAl fiber functionally gradient material（FGM） simulated body fluid（SBF） bone-like apatite 

分 类 号：TB34[一般工业技术—材料科学与工程]