Study of molybdenum effect on synthesis behavior of nanocrystalline NiAl intermetallic during mechanical alloying
Journal Title: Asian Journal of Nanoscience and Materials - Year 2018, Vol 1, Issue 3
Abstract
The mechanical alloying (MA) procedure was used to synthesize the Ni50Al50 and Ni50Al45Mo5 nanocrystalline intermetallic compound using the pure Ni, Al and Mo elemental powders under an argon atmosphere for different times (8, 16, 48, 80 and 128 h) in a planetary ball mill with hardened steel balls (12 balls-1cm and 4 balls-2cm in diameter). The mechanical alloying was carried out in the attendance of various Mo contents as a micro-alloying element for various milling times. Microstructural characterization and structural changes of powder particles during mechanical alloying were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Outcomes confirmed that the synthesis behavior of NiAl intermetallic depends on the milling time and Mo content. The results show that after than 80h milling, the intermetallic phase is produced after opening the vial lid. X-ray map show that, in the fixed milling time, enhancing the Mo content leads to acceleration in the NiAl formation in air atmosphere. The mechanical alloyed powders have a microstructure consisting of nanometer size particles. Mo enhance has a considerable effect on the lowering of crystallite size. The TEM image showed that the Ni50Al45Mo5 nano-particles were less than 10 nm. The average grain size is smaller than those sizes obtained in the NiAl (25 – 35 nm) alloy.
Authors and Affiliations
Ali Khajesarvi, Gholamhossein Akbari
Keywords
Related Articles
- EP ID EP580004
- DOI 10.26655/ajnanomat.2018.6.5
- Views 69
- Downloads 0
Nano-Sized and Single Crystal of a 1D Copper(I) Coordination Polymer: Preparation, Characterization, Thermal and Structural Studies
Nano-sized powder of a new 1D copper(I) coordination polymer, [Cu(nba2en)(NCS)]n (1), (nba2en = N,Nʹ-bis(4-ntrobenzylidene)ethane-1,2-diamine, was synthesized using ultrasonic bath assisted and characterized by scanning...
Polymer-based Material for Lithium-Ion Batteries: Structure, Material Engineering, Device Performance and Challenges (Review)
Batteries are a major technological challenge in this new century as they are a key method to make use of energy efficiently. Nowadays Lithium-ion batteries (LIBs) appeared to be one of the most important energy storage...
Preparation of different manganese oxide structures via controlling the concentration and the type of the alkaline media
Birnessite and manganite materials were prepared using a simple precipitation process in an alkaline medium. Potassium hydroxide and tetraethyl ammonium hydroxide (TEAH) used as the precipitating agents. Different techni...
A computational study of thermophysical, HOMO, LUMO, vibrational spectrum and UV-visible spectrum of cannabicyclol (CBL), and cannabigerol (CBG) using DFT
Cannabicyclol, also called CBL, is one of the least known and studied isomer of cannabinoids in the cannabis plant, and it is the precursor of the different cannabinoids found in marijuana plant having with widespread me...
Highly effectual synthesis of 4H-pyrano [2, 3-c] pyrazoles using N1, N1, N2, N2-tetramethyl-N1, N2-bis (sulfo) ethane-1, 2-diaminium trifluoroacetate as a dual-functional catalyst
In this research study, highly effective preparation of 4H-pyrano[2, 3-c]pyrazoles was discussed. The one-pot multi-component reaction between the malononitrile, arylaldehydes and 3-methyl-1-phenyl-1H-pyrazol-5 (4H)-one...