Y对Zr_(56)Co_(28)Al_(16)非晶合金结构和性能的影响

Effects of Yttrium Addition on Structure,Mechanical Properties and Corrosion Resistance of Bulk Glassy Zr-Co-Al-(Y) Alloys

采用铜模吸铸法制备了一系列不含Ni和Cu的(Zr56Co28Al16)100-xYx(x=0,1,2,4)大块非晶合金(BMGs),对ZrCo-Al-(Y)系BMGs的结构、力学性能、耐蚀性能作了研究。结果表明,随Y含量增加,过冷液相区宽度(△Tx)从x=0的50.0K增加到x=2的59.2K;室温压缩断裂强度(σf)和塑性变形量(εp)分别从x=0的1 785 MPa、0,增加到x=2的1 965 MPa、4.1%。(Zr56Co28Al16)98Y2非晶合金在磷酸盐缓冲液中表现出良好的耐蚀性能,且具有76GPa的低杨氏模量。

A series of （Zr56Co28Al16）100-xYx（x= 0,1,2,4）bulk metallic glasses（BMGs）with Ni-free and Cu-free were prepared successfully using water-cooling copper mold method.Effects of yttrium addition on thermal stability,strucrure and mechanical properties of the bulk glassy Zr-Co-Al-（Y）alloys were in-vestigated.The results indicate that the addition of Y can improve significantly the thermal stability and mechanical properties.The supercooled liquid region can be increased from 50 K（x= 0）to 59.2 K（x=2 ）.Both of compressive fracture strength （σf ）and plasticity strain （εp ）are enhanced considerably from 1 785 MPa,0 % （x= 0）to 1 965 MPa,4.1% （x= 2）.（Zr56Co28Al16）98Y2 amorphou alloy exhibits satis-fied corrosion resistamce in phosphate solution with Youngs modulus of 76 GPa.