FeNiAlGaPBSiC系块体非晶合金的结构、热参数及形成能力分析  

Conformation, Thermodynamic Parameters and Glass Forming Ability of Bulk Amorphous Alloys of FeNiAlGaPBSiC System

作　　者：傅明喜[1] 赵江[1] 周宏军[1] 王芳芳[1] 卢永慧[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《稀有金属材料与工程》2008年第6期970-974,共5页Rare Metal Materials and Engineering

基　　金：江苏省教育厅高校科学研究项目(03KJD430067)

摘　　要：采用铜模喷铸法制备了0.5mm厚,15mm宽,20mm长的板状Fe(73.6-x)Ni1Al5Ga2P9.65BxSi3C5.75(x=6.6,7.6,8.6,9.6,at%,下同)系块体非晶合金,利用XRD、DSC和SEM,研究了样品的内部结构、热力学参数及形成能力。实验结果表明:当x=8.6,9.6时,样品则为典型的非晶合金,当x=6.6,7.6时,样品为非晶纳米晶合金;通过分析该系列合金的热力学参数,发现Trgm、Trgl和γ均表现出变化一致的玻璃形成能力(GFA),而ΔTx却恰恰相反,说明其应用有局限性;同时还构想了非晶的团簇结构,并分析了该合金系的玻璃形成能力,表明该系列合金具有较大的玻璃形成能力。Bulk amorphous plates （0.5 mm × 1.5 mm × 20 mm） of Fe（73.6-x）NilAl5Ga2P9.65BxSi3C5.75 （x=6.6, 7.6, 8.6, 9.6, at%） have been prepared by water cooled copper mold method. Their conformation, thermodynamic parameter and glass forming ability （GFA） of bulk amorphous alloys were investigated by means of XRD, DSC and SEM. Experiment results show that the alloys exhibit typical amorphous alloy morphology if by addition of 8.6% and 9.6% B （atom percentage）, but a little portion of crystalline phase will be precipitated from the amorphous matrix alloy if by addition of 6.6% and 7.6% B. It is also found that the Trgm, Trgl and y values exhibit the same trend with the glass forming ability, but ATx value represents the reverse trend according to the thermodynamic parameters of this series bulk amorphous alloys, showing the limitation for application. Meanwhile, the amorphous clusters conformation is concerned and the glass forming ability of bulk amorphous alloys of FeNiAlGaPBSiC system are discussed in this study. It can be concluded that this series of bulk amorphous alloys have a better glass forming ability.

关 键 词：块体非晶合金 团簇 玻璃形成能力 

分 类 号：TG139.8[一般工业技术—材料科学与工程]