Synthesis, characterization and biological activity in vitro of FeCrAl(f)/HA asymmetrical biological functionally gradient materials
来源期刊：中南大学学报(英文版)2014年第2期
论文作者：YANG Hai-lin(杨海林) LI Jing(李婧) FANG Hua-chan(方华婵) 周忠诚 TONG Xiao-yang(童晓阳) RUAN Jian-ming(阮建明)
文章页码：447 - 453
Key words：hydroxyapatite (HA); FeCrAl fiber; functionally gradient material (FGM); simulated body fluid (SBF); bone-like apatite
Abstract: 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.
YANG Hai-lin(杨海林), LI Jing(李婧), FANG Hua-chan(方华婵), ZHOU Zhong-cheng(周忠诚), TONG Xiao-yang(童晓阳), RUAN Jian-ming(阮建明)
(State Key Laboratory of Powder Metallurgy (Central South University), Changsha 410083, China)
Abstract: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.
Key words:hydroxyapatite (HA); FeCrAl fiber; functionally gradient material (FGM); simulated body fluid (SBF); bone-like apatite
