(1. 沈陽(yáng)工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，沈陽(yáng) 110023；
2. Daimler-Chrysler Corporation，Stuttgart 70546；
3. 北京航空航天大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083)
摘 要: 采用液態(tài)金屬滲流法制備直徑為6 mm 的Zr基塊體多孔非晶合金，采用掃描電鏡(SEM)和X射線衍射儀(XRD)分析多孔材料的結(jié)構(gòu)、形貌、斷口特征和相組成，同時(shí)對(duì)多孔非晶合金的孔隙結(jié)構(gòu)和力學(xué)特點(diǎn)進(jìn)行分析。結(jié)果表明：采用CaC2作為孔隙支撐材料，能夠制備出孔隙分布均勻、孔隙直徑為0.2~0.8 mm的多孔非晶合金，其密度和孔隙率分別為3.57 g/cm3和47%。壓縮力學(xué)性能實(shí)驗(yàn)表明：該多孔非晶合金的應(yīng)力—應(yīng)變曲線具有鋸齒狀變化規(guī)律，應(yīng)力逐漸降低，其最大強(qiáng)度和應(yīng)變分別為383 MPa和18.6%，應(yīng)變量遠(yuǎn)大于單相非晶合金的應(yīng)變量。
關(guān)鍵字: 多孔非晶合金；滲流鑄造；力學(xué)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
