Zr基非晶合金多孔材料的制备与性能  

Fabrication and mechanical properties of porous Zr-based bulk metallic glass

作　　者：邱克强[1] 赵宇航[1] 任英磊[1] 张式程 张涛[3] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110023 [2]Daimler-Chrysler Corporation,Smugart 70546 [3]北京航空航天大学材料科学与工程学院,北京100083

出　　处：《中国有色金属学报》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)

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.

关 键 词：多孔非晶合金 渗流铸造 力学性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]