Structural Studies of Mechanically Alloyed Fe1–xAlx Powder

Authors S. Khan1, A. Vyas1, S. Rajan2, S. Jani3, R. Brajpuriya1

1Amity University Haryana, Manesar, Gurgaon, Haryana, India

2Department of Applied Sciences and Humanities, Chaudhary Ranbir Singh State Institute of Engineering and Technology, Silani Kesho Jhajjar, Haryana, India

3Department of Applied Physics, Amity School of Pure and Applied Sciences, Amity University Madhya Pradesh, Gwalior, MP, India

Issue Volume 12, Year 2020, Number 4
Dates Received 24 April 2020; revised manuscript received 15 August 2020; published online 25 August 2020
Citation S. Khan, A. Vyas, S. Rajan, et al., J. Nano- Electron. Phys. 12 No 4, 04012 (2020)
PACS Number(s) 71.20.Lp, 81.20.Ev, 87.64.Bx, 8.37.Hk, 68.37.Lp
Keywords FeAl alloy, TEM (76) , Ball milling.

A study was made on the identification of change of structure of Fe1 – xAlx alloy samples prepared by ball milling. The XRD, SEM and TEM techniques were used to study the structural and morphological modifications in the samples as a function of x and milling. As a result of milling (5 h), whole bulk of Fe and Al powder is mostly converted into an ordered solid solution. The planes are mostly aligned along (110) direction of Fe and depict a crystalline structure regardless of the value of x. As a result of milling, Fe-rich phases are formed in the case of Fe-rich samples, whereas, Al-rich phases dominate as the Al rich content increases. Similar information was also received from the SEM and TEM studies, showing the complete disappearance of the initial shape and emergence of a structure which is a composite of large and small grains of diverse sizes due to severe fracture and cold welding due to milling. The average grain size of about 6-8 nm was obtained after 5 h of milling using XRD which is also confirmed by SEM and TEM. The process of transition to nanostructured alloy leads to expansion of lattice parameters along with reduction in grain size.

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