Structural evolution during mechanical milling and subsequent annealing of Cu–Ni–Al–Co–Cr–Fe–Ti alloys

Abstract In this research, effect of the various mechanical milling process on morphology and microstructural changes of nano and micron Al-powders was studied. The milling of Al-powders was performed by both high energy and low energy ball milling process. The influence of milling (pulverizing) energy on the structural changes of Al-powders was studied. Al-nanoparticles were agglomerated during the MA and its size was increased with increasing milling while micron Al-powder gets flattened shape during high energy ball milling due to severe plastic deformation. Meanwhile, structural evolution during high energy ball milling of the nano powder occurred faster than that of the micron powder. A slight shift in the position of X-ray diffraction peaks was observed in nano Al-powders but it was un-altered in macro Al-powders. The variation in lattice parameters was observed only for nano Al powders during the high energy ball milling due to lattice distortion.

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Magnetic properties and microstructure of LaCo5-based powders produced by mechanical milling and subsequent annealing

Journal of Applied Physics ◽

10.1063/1.1467628 ◽

2002 ◽

Vol 91 (9) ◽

pp. 6147-6153 ◽

Cited By ~ 6

Author(s):

H. Okumura ◽

F. Zhang ◽

G. C. Hadjipanayis

Keyword(s):

Magnetic Properties ◽

Mechanical Milling ◽

Subsequent Annealing

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High coercivity in nanostructured PrCo5-based powders produced by mechanical milling and subsequent annealing

Applied Physics Letters ◽

10.1063/1.125265 ◽

1999 ◽

Vol 75 (20) ◽

pp. 3165-3167 ◽

Cited By ~ 48

Author(s):

Zhongmin Chen ◽

X. Meng-Burany ◽

G. C. Hadjipanayis

Keyword(s):

Mechanical Milling ◽

Subsequent Annealing ◽

High Coercivity

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STRUCTURAL AND MORPHOLOGICAL EVALUATION OF NANO-SIZED MoSi2 POWDER PRODUCED BY MECHANICAL MILLING

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512002358 ◽

2012 ◽

Vol 05 ◽

pp. 464-471 ◽

Cited By ~ 1

Author(s):

MAHMOOD SAMEEZADEH ◽

HASSAN FARHANGI ◽

MASOUD EMAMY

Keyword(s):

Crystallite Size ◽

Size Distribution ◽

Mechanical Milling ◽

Milling Time ◽

Lattice Strain ◽

Average Particle Size ◽

Structural Evolution ◽

Milling Process ◽

Average Particle ◽

Size Refinement

Nano-sized intermetallic powders have received great attention owing to their property advantages over conventional micro-sized counterparts. In the present study nano-sized MoSi 2 powder has been produced successfully from commercially available MoSi 2 (3 μm) by a mechanical milling process carried out for a period of 100 hours. The effects of milling time on size and morphology of the powders were studied by SEM and TEM and image analyzing system. The results indicate that the as-received micrometric powder with a wide size distribution of irregular shaped morphology changes to a narrow size distribution of nearly equiaxed particles with the progress of attrition milling up to 100 h, reaching an average particle size of 71 nm. Structural evolution of milled samples was characterized by XRD to determine the crystallite size and lattice microstrain using Williamson-Hall method. According to the results, the crystallite size of the powders decreases continuously down to 23 nm with increasing milling time up to 100 h and this size refinement is more rapid at the early stages of the milling process. On the other hand, the lattice strain increases considerably with milling up to 65 h and further milling causes no significant changes of lattice strain.

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