【作者】 韩凯明； 羌建兵； 王英敏； Haeussler Peter；

【Author】 Han Kaiming;Qiang Jianbing;Wang Yingmin;Haeussler Peter;Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), Dalian University of Technology;

【机构】 大连理工大学三束材料改性教育部重点实验室；

【摘要】 不含有毒元素Zr-Al-Co-Cu系金属玻璃有望用作生物医用器件材料。本文从Zr_55.8Al_19.4Co_24.8三元基础成分出发,探讨了Cu的添加对基础合金的玻璃形成能力（GFA）及相关金属玻璃的热稳定性、室温力学与耐蚀性能等的影响作用,并用普通铜模铸造法制备出Zr_55.8Al_19.4(Co_1-xCu_x)24.8（x=0-0.8）系列块体金属玻璃（BMGs）。其中,Zr_55.8Al_19.4Co_17.36Cu_7.44成分处合金的GFA最优,其形成玻璃的临界直径d_max达12 mm,并且,该金属玻璃具有良好的综合室温力学与耐蚀性能:杨氏模量为89.8 GPa,室温压缩塑性应变达4.0%,断裂强度约2.0 GPa,断裂韧性近120 MPa m^1/2;在37℃磷酸盐缓冲液（PBS）中Zr_55.8Al_19.4Co_17.36Cu_7.44金属玻璃显示出优良的耐蚀性,其自腐蚀电流密度为5.0×10^-9 A/cm²,比同条件下Ti6Al4V合金低一个数量级。这种兼具大GFA与优良物理化学性能的Zr-Al-Co-Cu金属玻璃适合用作生物医用器件材料。更多还原

【Abstract】 Toxic element-free Zr-Al-Co-Cu bulk metallic glasses（BMGs） are probable candidates as surgical devices materials.In the present work, the quaternary compositions are produced by taking Zr_55.8Al_19.4Co_24.8 as a basic alloy, and Cu as an alloying element.Then the effect of Cu addition on glass formation,thermal glass stability, mechanical behaviors and corrosion resistance of a series of Zr_55.8Al_19.4(Co_1-xCu_x)24.8（in at.%, x=0-0.8） bulk metallic glasses（BMGs） prepared by copper mold casting method wereinvestigated.The Zr_55.8Al_19.4Co_17.36Cu_7.44 BMG alloy is found to combine a centimeter scale glass formation size(d_max = 12 mm) and with high Young’s modulus（E =89.8 GPa）,ultrahigh strength（σ_y = 2.04 GPa）, large room-temperature plasticity（ε_P=4.0%） and high fracture toughness about 120 MPa m^1/2.And the BMG exhibitsgood corrosion resistance in PBS open to air at 37 ℃.The passive current density is 5.0×10^-9 A/cm², which is one order of magnitude lower than Ti6Al4V alloy at same condition.The combination of high GFA and excellent physicochemical properties suggests that the Zr_55.8Al_19.4Co_17.36Cu_7.44 BMG can be a promising surgical devices material.更多还原