摘要
采用液态金属渗流法制备直径为6mm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0．2-0．8mm的多孔非晶合金，其密度和孔隙率分别为3．57g/cm^3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383MPa和18．6％，应变量远大于单相非晶合金的应变量。
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/cm^3 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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2009年第5期900-903,共4页
The Chinese Journal of Nonferrous Metals
基金
沈阳市科技局计划资助项目(306132)
教育部春晖计划资助项目(Z2006-1-11004)
国家重点基础研究发展计划资助项目(2007CB613900)
关键词
多孔非晶合金
渗流铸造
力学性能
porous metallic glass
melt infiltrating casting
mechanical properties
