三维互穿结构SiC晶须骨架增强镁基复合材料制备及其力学性能

谷瑞成, 张健, 张明阳, 刘艳艳, 王绍钢, 焦大, 刘增乾, 张哲峰

Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties

GU Ruicheng, ZHANG Jian, ZHANG Mingyang, LIU Yanyan, WANG Shaogang, JIAO Da, LIU Zengqian, ZHANG Zhefeng

图5 经不同预氧化温度处理的SiCw骨架熔渗纯Mg和AZ91D镁合金得到的复合材料的典型弯曲应力-应变曲线,以及对应1200℃预氧化温度的以纯Mg和AZ91D镁合金为基体的复合材料单边缺口三点弯曲的典型载荷-位移曲线及裂纹扩展形貌

Fig.5 Representative flexural stress-strain curves of the SiCw/Mg composites fabricated by infiltrating pure Mg or AZ91D Mg alloy into the SiCw scaffolds pre-oxidized at different temperatures (Inset shows the loading configuration of samples for flexural test) (a), representative load-displacement curves for single-edge notched bending tests for the composites infiltrated with pure Mg and AZ91D Mg alloy into SiCw scaffolds pre-oxidized at 1200oC (The insets show the representative SEM images of the samples with distinctly different crack propagation behaviors and the loading configuration of samples for toughness measurement) (b)