Zr_(48)Cu_(36)Ag_(8)Al_(8)非晶合金等温晶化行为研究  

Research on Isothermal Crystallization Behaviors of Zr_(48)Cu_(36)Ag_(8)Al_(8)Metallic Glass

作　　者：孙琳琳 焦更生[1] 王倩文 刘媛美 SUN Linlin;JIAO Gengsheng;WANG Qianwen;LIU Yuanmei(School of Chemistry and Materials,Weinan Normal University,Weinan 714099,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]渭南师范学院化学与材料学院,陕西渭南714099 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《热加工工艺》2021年第20期73-75,81,共4页Hot Working Technology

基　　金：陕西省教育厅科研计划项目(20JK0636);渭南师范学院博士科研启动基金资助项目(20RC10)。

摘　　要：采用示差扫描量热仪(DSC)研究了Zr_(48)Cu_(36)Ag_(8)Al_(8)非晶合金的等温晶化行为,利用类JMA方程分析其等温晶化动力学。对该合金进行XRD和TEM分析。结果表明:在等温晶化过程中,形核激活能为319~354 kJ/mol,生长激活能为210~215 kJ/mol。随着等温温度升高,两者呈逐渐降低的趋势。晶化产物随着时间的延长,由Al_(2)Zr、Al_(3)Zr_(4)、CuZr及Cu_(10)Zr_(7)晶体相向AlAg_(3)、AlZr_(2)、ZrAg及Cu_(51)Zr_(14)转变,晶化产物的生长方式为三维界面扩散控制。The isothermal crystallization behavior of Zr_(48)Cu_(36)Ag_(8)Al_(8)amorphous alloy was studied by differential scanning calorimetry(DSC).The isothermal crystallization kinetics of the alloy was analyzed by class JMA equation.The XRD and TEM analysis of the alloy were carried out.The results show that during isothermal crystallization,the nuclear activation energy is 319-354 kJ/mol and the growth activation energy is 210-215 kJ/mol,which gradually decreases with the temperature increasing.The crystallization phases changes from Al_(2)Zr,Al_(3)Zr_(4),CuZr and Cu_(10)Zr_(7)to AlAg_(3),AlZr_(2),ZrAg and Cu_(51)Zr_(14)during isothermal heating.The growth mode of the crystallization is controlled by three-dimensional interfacial diffusion.

关 键 词：非晶合金 晶化 界面控制 等温退火 

分 类 号：TG139.8[一般工业技术—材料科学与工程]