Microstructure and reactivity of cryomilled Al-Ni energetic material with nanoscale lamellar structure

Sharma, Ashutosh; Lee, Hansung; Ahn, Byungmin

doi:10.1007/s10853-022-07429-9

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…However, despite their many benefits, the development of robust HEAs for automotive structural parts, which can replace the Al-Si-Cu alloys, is still in its early stages, and further research is required to fully understand their properties and behavior. Most HEAs are manufactured through arc melting [28]; however, researchers have recently recognised the importance of powder metallurgy for the large-scale production of HEAs [29][30][31][32]. In addition, the mechanical alloying (MA) process has been demonstrated to improve the nanostructuring of the powder particles, thus expanding the potential applications of HEAs at the nano-scale.…”

Section: Introductionmentioning

confidence: 99%

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

et al. 2023

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In this study, the effects of Cu addition on AlFeMnTiSi 0.75 Cu x (x = 0, 0.25, 0.5, 0.75, 1.00; in molar ratios) high entropy alloys (HEAs) prepared via mechanical alloying and spark plasma sintering were investigated. The structure, phase, morphology and composition of HEA powders were analysed and the results revealed that the AlFeMnTiSi 0.75 Cu x HEAs exhibited a multiphase structure. Additionally, after sintering at 900 °C, the formation of BCC, µ and L2 1 phases in the densified HEAs was enhanced. The investigation of the hardness, nanoindentation and compressive properties revealed that the microstructural and mechanical properties of AlFeMnTiSi 0.75 Cu x HEAs were improved at the optimal Cu fraction (0.25 molar ratio). The nanoindentation results revealed that the AlFeMnTiSi 0.75 Cu x HEAs exhibited the highest hardness and elastic modulus (H IT = 19.2 GPa, E IT = 336 GPa). These results improve the current understanding of multiphase HEAs and may pave way for the development of advanced HEAs with superior mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

et al. 2023

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“…However, there is limited information on the reciprocating wear of HEAs prepared through powder metallurgy. The MA of powder mixtures followed by SPS in powder metallurgy allows the fabrication of alloys at nanoscale with uniform distribution of constituents, even if their mutual solubility is limited [35–37]. Therefore, in this study, the authors examined the impact of Cu on the morphology, hardness, and tribological properties of AlSi 0.75 TiMnFeCu x HEAs ( x = 0, 0.25, 0.5, molar ratio) fabricated by a combination of MA and SPS technology.…”

Section: Introductionmentioning

confidence: 99%

Oxidative and abrasive wear of multiphase AlSi_0.75TiMnFeCu_x (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion

et al. 2023

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In this study, dry sliding wear of AlSi 0.75 TiMnFeCu x (x = 0, 0.25, 0.5) high-entropy alloy (HEA) produced through mechanical alloying (MA) and spark plasma sintering (SPS) was studied. The microstructure and phase evolution were examined using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The wear behaviour of HEAs was assessed by reciprocating wear monitor under a dry air atmosphere. The findings demonstrated that AlSi 0.75 TiMnFeCu x HEAs were multiphase body-centred cubic (BCC/B2) solid solution structured with complex µ-, L 21 , and Laves. It was discovered that the microhardness and wear behaviour of AlSi 0.75 TiMnFeCu x were comparable to AlSi 0.75 TiMnFe HEA after the addition of Cu up to 0.25 molar ratio. The maximum hardness of the AlCu 0-0.5 FeMnTiSi 0.75 HEAs reached around 1021-1035 HV. The tribology results show that an oxidative wear in AlSi 0.75 TiMnFe while the mixed adhesive-abrasive wear mechanism was prominent in the AlSi 0.75 TiMnFeCu 0.25-0.5 HEAs.

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“…To some extent, both physisorption and chemisorption processes seem to be clear in the stabilization of NPs during milling through organic molecules [ 12 , 13 ]. Because PCAs are the essential factor in maintaining stability and controlling facets in as-milled NPs, their effect on the as-milled NPs was analyzed by using experimental techniques [ 13 , 14 ], neural network models [ 15 ] and density functional theory (DFT) computations [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative DFT Study on Process Control Agents in the Mechanochemical Synthesis of PbTe

Rojas-Chávez

Miralrio

Juárez-García³

et al. 2022

IJMS

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A process control agent is an organic additive used to regulate the balance between fracturing and mechanical kneading, which control the size of the as-milled particles. Tributyl phosphate (TBP) is evaluated to act as surface modifier of PbTe, and it is compared with the results obtained using formaldehyde (CH2O). In order to elucidate the nature of the interaction between TBP and the PbTe surface, global and local descriptors were calculated via the density functional theory. First, TBP and CH2O molecules are structurally optimized. Then, vertical ionization energies as well as vertical electron affinities are calculated to elucidate how both molecules behave energetically against removal and electron gain, respectively. The results were compared with those obtained from the electrostatic potential mapped on the van der Waals isosurface. It is inferred that the theoretical insights are useful to propose adsorption modes of TBP and CH2O on the PbTe surface, which are usable to rationalize the facets exposed by PbTe after the surface treatment. The optimized structures of the compound systems showed a close correlation between the surface energy shift (Δγ) and the PbTe facets exhibited. Finally, a Wulff construction was built to compare the usage of TBP and CH2O molecules in PbTe morphology.

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Microstructure and reactivity of cryomilled Al-Ni energetic material with nanoscale lamellar structure

Cited by 9 publications

References 38 publications

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

Oxidative and abrasive wear of multiphase AlSi_0.75TiMnFeCu_x (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion

A Comparative DFT Study on Process Control Agents in the Mechanochemical Synthesis of PbTe

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Microstructure and reactivity of cryomilled Al-Ni energetic material with nanoscale lamellar structure

Cited by 9 publications

References 38 publications

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

Oxidative and abrasive wear of multiphase AlSi0.75TiMnFeCux (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion

A Comparative DFT Study on Process Control Agents in the Mechanochemical Synthesis of PbTe

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Oxidative and abrasive wear of multiphase AlSi_0.75TiMnFeCu_x (X = 0, 0.25, 0.5) high entropy alloy under non-lubricating reciprocating motion