Zr-Al-Ni-Cu非晶合金F-A_(2)B型晶化相析出形为  

Precipitation Behavior of F-A_(2)B Crystalline Phase in Zr-Al-Ni-Cu Amorphous Alloy

作　　者：刘伟东[1] 屈赫 屈华[1] 杨松 Liu Weidong;Qu He;Qu Hua;Yang Song(School of Materials Science and Engineering,Liaoning University of Technology)

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121001

出　　处：《特种铸造及有色合金》2022年第12期1496-1501,共6页Special Casting & Nonferrous Alloys

基　　金：辽宁省教育厅面上基金资助项目(LJK20621);辽宁工业大学大学生创新创业训练计划资助项目(201910154122,2020031)

摘　　要：基于EET(Empirical Electron Theory of Solids and Molecules)理论计算了Zr-Al-Ni-Cu非晶合金晶化初期可能析出的面心立方F-A_(2)B型晶化相的价电子结构,用最强键键合力n_(1)和结构单元总成键能力F分析了晶化相结构的稳定性。采用铜模吸铸法制备了Zr_(55)Al_(10)Ni_(5)Cu_(30)非晶合金,使用差示扫描量热分析法和X射线衍射法研究了Zr_(55)Al_(10)Ni_(5)Cu_(30)非晶合金的晶化过程及析出的晶化相。研究表明,Zr_(55)Al_(10)Ni_(5)Cu_(30)非晶合金在763 K等温退火,晶化初期形成了F-Zr_(2)Ni晶化相。F-Zr_(2)Ni最强共价键的n_(1)值分别比F-Zr_(2)Al、F-Zr_(2)Cu的高85.76%、29.59%,F-Zr_(2)Ni的总成键能力F分别比F-Zr_(2)Al、F-Zr_(2)Cu的高98.99%、9.96%;从晶化相的稳定性及其组成原子间最强键键合力看,Zr_(55)Al_(10)Ni_(5)Cu_(30)非晶合金晶化初期只能形成F-Zr_(2)Ni晶化相。Zr-Al-Ni-Cu非晶合金晶化初期晶化相类型取决于合金成分和晶化相稳定性及其组成原子间的键合力。Based on the EET theory,the VESs of the pussibly precipitated face-centered cubic F-A_(2)B crystalline phase in Zr-Al-Ni-Cu amorphous alloy at the initial stage of crystallization were calculated,and the stability of crystalline phase structure was analyzed with combination of the strongest bonding force n_(1)and total bonding ability of structural unit F.Zr_(55)Al_(10)Ni_(5)Cu_(30)amorphous alloy was prepared by copper mold suction casting,and crystallization process as well as the precipitated crystalline phases were investigated by differential scanning calorimetry and X-ray diffraction.The results indicate that F-Zr_(2)Ni crystalline phase is formed at the initial stage of crystallization of Zr_(55)Al_(10)Ni_(5)Cu_(30)amorphous alloy after isothermal annealing at 763 K.The n_(1)value of the strongest covalent bond of F-Zr_(2)Ni is 85.76%and 29.59%higher than that of F-Zr_(2)Al and F-Zr_(2)Cu,respectively,and the total bonding ability F of F-Zr_(2)Ni is 98.99%and 9.96%higher than that of F-Zr_(2)Al and F-Zr_(2)Cu,respectively.In view of stability of crystalline phases and the strongest bonding force between constituent atoms,only F-Zr_(2)Ni crystalline phase could be formed at the initial stage of Zr_(55)Al_(10)Ni_(5)Cu_(30)amorphous alloy crystallization,which depends on the alloy composition,the stability of crystallization phase and the bonding force between the constituent atoms.

关 键 词：Zr-Al-Ni-Cu非晶合金 晶化过程 晶化相 价电子结构 EET 

分 类 号：TG139.8[一般工业技术—材料科学与工程]