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Materials Congress 2018
Page 33
Nano Research & Applications
ISSN: 2471-9838
W o r l d C o n g r e s s o n
Materials Science & Engineering
A u g u s t 2 3 - 2 5 , 2 0 1 8
Am s t e r d a m , N e t h e r l a n d s
This paper aims at synthesizing and characterization of nanocrystalline
CoFeMnNiAl high-entropy alloy (HEA), using mechanical alloying (MA)
and spark plasma sintering (SPS). Effects of mechanical alloying time on the
morphology of powders, crystallite size and lattice strain of the synthesized
powders were investigated, using X-ray diffraction (XRD) and scanning
electron microscope (SEM). Synthesized powders were then consolidated by
means of spark plasma sintering (SPS). Effects of sintering temperature on
the mechanical properties of CoFeMnNiAl alloy were studied as well. Results
show that single phase high entropy alloy; with FCC structure is formed
after 30 h of milling. Further increase in milling time is associated with the
appearance of BCC phase. As well, results show that SPS temperature has
significant influence on the phase composition and mechanical properties of
the synthesized alloy.
Biography
Maryam Yazdan Mehr did her PhD at Delft University of
Technology from 2011 to till 2015, associated with Professor
Zhang and Professor van Driel in the ECTM group at TUDelft.
During her PhD, she worked on Organic Materials Degradation
in Solid State Applications. During this project, the reliability
and degradation of LEDs was for the first time studied from
both materials and system perspective. One of the greatest
achievements in this project was developing a high accelerated
ageing test methodology. The set-up and the concept are now
being used by Philips Lighting. So far, she has published almost
16 journal papers, more than 10 conference papers, and a book
chapter. After her PhD, she applied for an HTSM grant as a
Post-doc and it was granted in 2016. In June 2017, she started
her Post- doc project entitled Reliability of Optical Materials in
LED-based Products under Harsh Environments in the group of
Professor Zhang at TU Delft.
Synthesis and characterization of nanocrystalline
CoFeMnNiAl high-entropy alloy
M Yazdan Mehr 2, M Sajjadi1 and A Bahrami1
1Isfahan University of Technology, Iran
2Delft University of Technology, Netherlands
M Yazdan Mehr et al., Nano Res Appl 2018, Volume: 4
DOI: 10.21767/2471-9838-C4-017