【摘要】 采用铜模吸铸法将Ti元素添加到Zr65Cu17.5Al7.5Ni10非晶合金中,制备得到直径为3 mm的大块非晶合金。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、示差扫描量热仪(DSC)和微机控制电子式万能试验机等研究半固态处理对Zr60Cu17.5Al7.5Ni10Ti5大块非晶合金的微观组织结构、非晶形成能力、压缩力学性能以及断口形貌的影响。结果表明:半固态处理技术对非晶合金材料的组织结构和力学性能有很大的影响,能够提高非晶合金的强度和塑性;半固态下Zr60Cu17.5Al7.5Ni10Ti5表现出较好的非晶形成能力,表征非晶形成能力的参数Trg为0.618 9,过冷液相区△Tx达到40 K;且当吸铸电压为7 kV时试样的塑性最好,为1.94%,强度为1 487.411 MPa。更多还原

【Abstract】 A bulk amorphous alloy with diameter of 3 mm was prepared by water-cooled copper mold method through adding Ti element into the matrix of Zr60Cu17.5Al7.5Ni10Ti5.X-ray diffractometer(XRD),scanning electron microscope(SEM),differential scanning calorimeter(DSC) and micro-electric universal testing machine were employed to investigate the effect of semi-solid technology on the microstructure,glass forming ability,compression mechanical properties and facture surface of Zr60Cu17.5Al7.5Ni10Ti5 bulk amorphous alloy.The results indicate that the semi-solid technology markedly affects the structure and mechanical properties of the amorphous material,and improves the intensity and plastic of the alloy.The semi-solid Zr60Cu17.5Al7.5Ni10Ti5 exhibits an excellent glass forming ability,with Trg of 0.618 9 and supercooled liquid region(△Tx) of 40 K.When the suction-casting voltage is 7 kV,the sample with the best plastic of 1.94%,strength of 1 487.411 MPa is obtained.更多还原