(1. 沈阳工业大学 材料科学与工程学院，沈阳 110023；
2. Daimler-Chrysler Corporation，Stuttgart 70546；
3. 北京航空航天大学 材料科学与工程学院，北京 100083)
摘 要: 采用液态金属渗流法制备直径为6 mm 的Zr基块体多孔非晶合金，采用扫描电镜(SEM)和X射线衍射仪(XRD)分析多孔材料的结构、形貌、断口特征和相组成，同时对多孔非晶合金的孔隙结构和力学特点进行分析。结果表明：采用CaC2作为孔隙支撑材料，能够制备出孔隙分布均匀、孔隙直径为0.2~0.8 mm的多孔非晶合金，其密度和孔隙率分别为3.57 g/cm3和47%。压缩力学性能实验表明：该多孔非晶合金的应力—应变曲线具有锯齿状变化规律，应力逐渐降低，其最大强度和应变分别为383 MPa和18.6%，应变量远大于单相非晶合金的应变量。
关键字: 多孔非晶合金；渗流铸造；力学性能
porous Zr-based bulk metallic glass
（1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China;
2. Daimler-Chrysler Corporation, Stuttgart 70546, Germany;
3. School of Materials Science and Engineering, Beihang University, Beijing 100083, China）
Abstract: A porous Zr-based bulk metallic glass with a diameter of 6 mm was fabricated by melt infiltrating casting method. The porous cell morphology, structure, fracture surface and phase constituent of the porous material were investigated by scanning electron microscopy (SEM) and X-ray diffractometry (XRD), respectively. And the mechanical properties and cell structure were also discussed. The results show that a uniform distribution of porous cells with size of 0.2−0.8 mm forms by introducing CaC2 particles as space holders. The density and porosity of the porous bulk metallic glass are 3.57 g/cm3 and 47%, respectively. The largest yield strength of this porous material is 384 MPa and it gradually declines accompanied by serrated flow under compression. The final failure occurs at a strain of 18.6%, well in excess of monolithic amorphous alloys.
Key words: porous metallic glass; melt infiltrating casting; mechanical properties
