摘要
用单辊法制备了Fe73Al4Ga2P12B4Si4M1(M为Cu,Nb,Ni)非晶薄带,并用XRD,DSC,SEM对其非晶形成能力、晶化方式和晶粒形貌尺寸进行分析。结果表明,在Fe74Al4Ga2P12B4Si4中加入Cu后,玻璃转变温度(Tg)和晶化温度(Tx)消失,只有一个晶化峰,而在其后的退火过程中为二级晶化,分析可能是Tg和Tx重叠消失,用Nb和Ni替代后,合金的Tx和Tg都升高,而其过冷液相区减小,其晶化方式均为二级晶化。用扫描电镜观察原始试样晶化后颗粒呈菊花状,颗粒较大;用Cu替代晶粒尺寸明显减小,而且含Cu化合物呈网络状;用Nb替代之后,颗粒呈蘑菇状,晶粒也有一定程度的减小;用Ni替代后,晶化颗粒呈针状,颗粒较为细小。
Amorphous ribbions of Fe73Al4Ga2P12B4Si4M1（ M = Cu, Nb, Ni） alloys were prepared by single- roller melt-spinning method, the glass- forming ability, the crystallization mode and grain size of the amorphous alloys were investigated by XRD, DSC and SEM. The results indicate that addition of Cu makes the crystallization temperature of the alloy reduced and the glass transition temperature disapper. The crystalline grains of Fe73 Al4 Ga2 P12 B4 Si4 Cu1 alloy after crystallization are remarkably refined due to the formation of Fe-rich zones as nucleating centre in the early stage of crystallization and the formation of dispersed Cu6.69 Si phases. Tg and Ts increase but the glass transition temperature decreases for the amorphous alloys with Nb and Ni. A rod-like microstructure of Fe73 Al4 Ga2 P12 B4 Si4 Nb1 alloy and a mushroom-like microstructuro of Fe73 Al4 Ga2 P12 B4 Si4 Ni1 alloy are observed after crystallization, respectively.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2008年第1期8-11,共4页
Transactions of Materials and Heat Treatment
基金
江苏省教育厅高校科学研究项目(03KJD430067)
关键词
铁基非晶
非晶形成能力
晶化
纳米晶
Fe-based amorphous alloy
glass-forming ability
crystallization
nanocrystalline
