Role of aluminium addition on structure of Fe substituted Fe73.5−ð�?�¥Si13.5B9Nb3Cu1Alð‘�? alloy ribbons

Bulletin of materials science

Gautam Agarwal³  N K Mukhopadhyay³  B Majumdar²  Himanshu Agrawal³  M Srinivas¹ 

[1]Naval Science and Technological Laboratory, Visakhapatnam 530 027, India$$Naval Science and Technological Laboratory, Visakhapatnam 530 027, IndiaNaval Science and Technological Laboratory, Visakhapatnam 530 027, India$$

[2]Defence Metallurgical Research Laboratory, Hyderabad 500 058, India$$Defence Metallurgical Research Laboratory, Hyderabad 500 058, IndiaDefence Metallurgical Research Laboratory, Hyderabad 500 058, India$$

[3]Department of Metallurgical Engineering, Banaras Hindu University, Varanasi 221 005, India$$Department of Metallurgical Engineering, Banaras Hindu University, Varanasi 221 005, IndiaDepartment of Metallurgical Engineering, Banaras Hindu University, Varanasi 221 005, India$$

关键词: Rapid solidification;    amorphous;    nanocrystalline;    glass forming ability;    Finemet;    soft magnetic properties.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The investigation has dealt with the structure and magnetic properties of rapidly solidified and annealed Fe_{73.5−ð�?��?}Si_13.5B₉Nb₃Cu₁Al_ð‘�? (ð‘�? = 0, 2, 4, 6 at%) ribbons prepared by melt spinning. Complete amorphous structure was obtained in as-spun ribbons of ð‘�? = 0 and 2 at% compositions, whereas structure of ribbons containing higher Al was found to be partially crystalline. Detailed thermal analyses of the alloys and the melt spun ribbons revealed that the glass forming ability in the form of ð‘�??_x/ð‘�??_l (ratio between crystallization and liquidus temperature) is the highest for 2 at% Al alloys and decreases with further addition of Al. Annealing of all as spun ribbons resulted in the precipitation of nanocrystalline phase embedded in amorphous matrix in the form of either 𝐷ð‘�??₃ phase or 𝑏ð�?�ð�?��? ð›�?-Fe(Si/Al) solid solution depending on the initial composition of the alloy. Only 𝑏ð�?�ð�?��? ð›�?-Fe(Si/Al) solid solution was formed in 2 at% Al ribbons whereas ordered DO₃ structure was found to be stabilized in other ribbons including 0 at% Al. A detailed study on determination of precision lattice parameter of nanocrystalline phase revealed that the lattice parameter increases with the addition of Al indicating the partitioning behaviour of Al in nanocrystalline phase.

【 授权许可】

Unknown