非晶合金的热稳定性与热加工窗口研究  

The thermal stability and thermal processing window of amorphous alloys

作　　者：尤俊华[1] 马理[1] 邱克强[1] 曲迎东[1] 李荣德[1] YOU Junhua MA Li QIU Keqiang QU Yingdong LI Rongde(School of Meterials Science and Engineering, Shenyang University of Technology, Shenyang 110870,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《功能材料》2016年第B06期159-163,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51401130);辽宁省自然科学基金资助项目(2014028015);辽宁省高等学校优秀人才资助项目(LJQ2012009);辽宁省创新团队资助项目(LT2015020)

摘　　要：采用铜模喷铸法制备了Mg_(68)Zn_(28)Ca_4、Cu_(47)Ti_(34)Zr_(11)Ni_8和Zr_(60)Nb_5Cu_(20)Fe_5Al_(10) 3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,Mg68Zn28Ca4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,Cu_(47)Ti_(34)Zr_(11)Ni_8和Zr_(60)Nb_5Cu_(20)Fe_5Al_(10)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288.75kJ/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.

关 键 词：非晶合金 晶化激活能 热加工稳定性 热加工窗口 

分 类 号：TG14[一般工业技术—材料科学与工程] TG139.8[金属学及工艺—金属材料]