FeCrAl纤维对FeCrAl(f)/HA复合材料显微结构及力学性能的影响(英文)

采用热压工艺制备FeCrAl纤维增强的FeCrAl(f)/HA生物复合材料,通过金相显微镜、X射线衍射、扫描电子显微镜(SEM)以及能谱(EDS)等测试手段对试样的微观结构及成分进行观察和表征。采用三点抗弯法测定FeCrAl(f)/HA复合材料试样的力学性能。研究结果表明:复合材料的性能随FeCrAl纤维加入得到提高,并随着纤维含量(0～11%,体积分数)的增加逐渐明显下降。HA基体和FeCrAl纤维界面结合紧密,互相咬合较深,并在两相上出现了一定程度的互扩散。FeCrAl(f)/HA生物复合材料的最优化参数如下:纤维直径22μm,长度1-2mm、体积分数7%左右。

Influence of FeCrAl fiber on microstructure and mechanical properties of FeCrAl(f)/HA composites

FeCrAl fiber-reinforced hydroxyapatite (HA) biocomposites (FeCrAl(f)/HA) were fabricated by the hot pressing technique. The metallographic microscopy, X-ray diffractometry, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to observe and analyze the microstructure and composition of FeCrAl(f)/HA composites, respectively. The mechanical properties of FeCrAl(f)/HA composites were measured by the three-point-bending test. The results show that the composite can be reinforced by FeCrAl fiber and enhanced gradually, and then declined with the increase of the content of FeCrAl fiber (0-11%, volume fraction) in the whole range of experiments. Both the HA matrix and FeCrAl fiber integrate very tightly and bit into each other very deeply and counter-diffusion takes place to some extent at two-phase interface. The optimum parameters of FeCrAl(f)/HA composite are diameter of 22 μm, length of 1–2 mm and of volume faction of about 7% for FeCrAl fibers.