采用铜模喷铸法制备了Mg68 Zn28 Ca4、Cu47 Ti34 Zr11 Ni8和Zr60 Nb5 Cu20 Fe5 Al103种非晶合金,通过 X射线衍射仪(XRD),差热分析仪(DSC)研究了非晶合金的热加工稳定性,并建立了三维热加工窗口.结果表明, Mg68 Zn28 Ca4的过冷液相区没有明显随着加热速率的增大向高温区移动,Cu47 Ti34 Zr11 Ni8和 Zr60 Nb5 Cu20 Fe5 Al10非晶合金的过冷液相区随着加热速率的增大向高温区移动.用 Kissinger 方法计算出3种非晶的晶化激活能分别为177．26,288．98和288．75 kJ/mol.根据建立的三维热加工窗口中可以直接制定非晶合金的加工工艺,确定加工温度及最大加热时间.
Mg68 Zn28 Ca4 ,Cu47 Ti34 Zr11 Ni8 and Zr60 Nb5 Cu20 Fe5 Al10 amorphous alloys are prepared using copper mold casting.The thermal stability of the samples are investigated by X-ray diffractometer (XRD)and differen-tial scanning calorimeter (DSC).And 3D thermal processing window was set up.The results showed that the supercooled liquid region of Mg68 Zn28 Ca4 did not obviously move to high temperature region with the increase of the heating rate.The supercooled liquid region of Cu47 Ti34 Zr11 Ni8 and Zr60 Nb5 Cu20 Fe5 Al10 amorphous alloy move to the high temperature region with the increase of heating rate.According to the Kissinger’s method,the Ex of the three components is respectively 177.26,288.98 and 288.75 kJ/mol.From the thermal processing win-dow,the processing technology of amorphous alloy,the processing temperature and maximum heating time can be determined.
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