摘要
选用等原子比NiTi预合金粉末作为原料,以聚氨酯泡沫为模板,采用浸渍法制备了一种具有高孔隙率、孔径可控、孔隙三维连通且生物力学相容性优良的多孔镍钛合金材料。通过X射线衍射仪、体视显微镜、扫描电子显微镜及力学试验机,研究分析了两种不同型号有机模板（R2D25和DP91308）制备的多孔镍钛合金的物相组成、微观结构和力学性能。结果表明：有机模板浸渍法可以制备出高孔隙率且具有三维连通孔隙结构的多孔镍钛合金。两种模板对应的孔隙率分别为71.8%和63.8%,孔径分布在250~500μm和150~400μm之间,抗压强度分别为16.37和73.52MPa,弹性模量为0.51和2.45GPa,与人体骨组织的结构与性能相匹配。
Nickel-titanium alloy foams with a high porosity, controllable aperture and 3D interconnected porous structure were prepared by an impregnation technique with equiatomic pre-alloy powder as starting material and polyurethane sponge as templates. The alloy foams possess excellent biocompatibility and mechanical compatibility. The phase composition, microstructure and mechanical properties of NiTi foams with different template types （R2D25 and DP91308） were studied by XRD, stereomicroscope, SEM and electronic mechanical testing instrument, respectively. Two types of NiTi foams prepared by the polymer sponge impregnation technique have high porosity （71.8% and 63.8%, respectively） and 3D interconnected porous structure, and the pore sizes are in the range of 250~500 and 150~400 μm, respectively. Compressive yield strength of them is 16.37 and 73.52 MPa, respectively and elastic modulus is 0.51 and 2.45 GPa, respectively, which match with bone in microstructure and mechanical properties.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第5期1023-1027,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50604017
50774096)
关键词
多孔镍钛合金
浸渍法
三维连通孔隙
孔隙率
porous NiTi alloy
impregnation process
3D interconnected pore
porosity
作者简介
李婧，女，1986年生，博士，中南大学粉末冶金研究院，湖南长沙410083，电话：0731-88876644，E—mail：pincoujiyi666@163．com
