Surface states of gas-atomized Al 6061 powders – Effects of heat treatment

Ernst, Alexis T.; Kerns, Peter; Nardi, Aaron; Brody, H. D.; Dongare, Avinash M.; Lee, Seok‐Woo; Champagne, Victor K.; Suib, Steven L.; Aindow, Mark

doi:10.1016/j.apsusc.2020.147643

Cited by 18 publications

(3 citation statements)

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“…Especially, the deconvolution of the O 1s spectra revealed the M–O–M bonding that affirms Ni metal occupies both octahedral and tetrahedral sites. 33 Such bonding strongly supports the phase change of the alumina oxide nanoparticles. According to the XPS evolution, the binding energies show a positive shift (increase) with the respective Ni dopant leading to speculation that the restructuring of the surface increases the surface area of the particles.…”

Section: Resultsmentioning

confidence: 78%

Ni-doped Al₂O₃ sensor for effective SO₃ gas adsorption and sensing

et al. 2023

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Section: Resultsmentioning

confidence: 78%

Ni-doped Al₂O₃ sensor for effective SO₃ gas adsorption and sensing

et al. 2023

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“…More to the point, Bedard et al claimed to have observed "cell-like solidification microstructures" in their Al 6061 feedstock [42]. Beyond the work of Bedard et al, Ernst et al purported that "cellular-dendritic", i.e., compound-like, solidification microstructures were observable in another gas-atomized Al 6061 powder [43]. However, according to Vijayan et al, gas-atomized Al 6061 powder particles reportedly maintained a pronounced cellular solidification microstructure that was identified as being more cellular than the cellular/dendritic or cell-like microstructures reported by Bedard et al and Ernst et al [44].…”

Section: Resultsmentioning

confidence: 99%

Thermal Preprocessing of Rapidly Solidified Al 6061 Feedstock for Tunable Cold Spray Additive Manufacturing

Haddad

Sousa

Tsaknopoulos

et al. 2022

Metals

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In this work, the influence of thermal pre-processing upon the microstructure and hardness of Al 6061 feedstock powder is considered through the lens of cold spray processing and additive manufacturing. Since solid-state cold spray processes refine and retain microstructural constituents following impact-driven and high-strain rate severe plastic deformation and bonding, thermal pre-processing enables application-driven tuning of the resultant consolidation achieved via microstructural and, therefore, mechanical manipulation of the feedstock prior to use. Microstructural analysis was achieved via X-ray diffraction, scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction, energy dispersive spectroscopy, and differential thermal calorimetry. On the other hand, nanoindentation testing and analysis were relied upon to quantify pre-processing effects and microstructural evolution influences on the resultant hardness as a function of time at 540 °C. In the case of the as-atomized powder, β-Mg2Si-, Al-Fe-, and Mg-Si-type phases were observed along polycrystalline grain boundaries. Furthermore, after a 60 min hold time at 540 °C, Al-Fe-Si-Cr-Mn- and Mg-Si-type intermetallic phases were also observed along grain boundaries. Furthermore, the as-atomized hardness at 250 nm of indentation depth was 1.26 GPa and continuously decreased as a function of hold time until reaching 0.88 GPa after 240 min at 540 °C. Finally, contextualization of the observations with tuning cold spray additive manufacturing part performance via powder pre-processing is presented for through-process and application-minded design.

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“…4. The amorphous structure is formed because the droplet size is small and it is easy to obtain a higher cooling rate during the cooling process [23,24]. Chang et al [25] compared the properties of Fe 76 Si 9 B 10 P 5 Febased amorphous alloy powders prepared by water atomization and gas atomization.…”

Section: Gas Atomization Methodsmentioning

confidence: 99%

Application of Fe-Based Amorphous Alloy in Industrial Wastewater Treatment: A Review

Pei¹,

Zhang²,

Yuan³

2022

Journal of Renewable Materials

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Amorphous alloy (MGs) is a solid alloy with disordered atomic accumulation obtained by ultra-rapid solidification of alloy melt. The atom deviates from the equilibrium position and is in metastable state. Up to now, a large number of MGs have been applied to the treatment of dye and heavy metal contaminated wastewater and ideal experimental results have been obtained. However, there is no literature to systematically summarize the chemical reaction and degradation mechanism in the process of degradation. On the basis of reviewing the classification, application, and synthesis of MGs, this paper introduces in detail the chemical reactions such as decolorization, mineralization, and ion leaching of Fe-based amorphous alloy (Fe-MGs) in the degradation of organic and inorganic salt wastewater through direct reduction or advanced oxidation mechanism. Compared with crystalline materials, the higher reaction rate of Fe-MGs can be attributed to lower activation energy, negative redox potential, loose product layer, and band structure with downward shift of valence band top. Finally, some suggestions and prospects are put forward for the limitations and research prospects of MGs in the environmental field, which provides a new idea for the synthesis of new environmental functional materials.

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Surface states of gas-atomized Al 6061 powders – Effects of heat treatment

Cited by 18 publications

References 50 publications

Ni-doped Al₂O₃ sensor for effective SO₃ gas adsorption and sensing

Ni-doped Al₂O₃ sensor for effective SO₃ gas adsorption and sensing

Thermal Preprocessing of Rapidly Solidified Al 6061 Feedstock for Tunable Cold Spray Additive Manufacturing

Application of Fe-Based Amorphous Alloy in Industrial Wastewater Treatment: A Review

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Surface states of gas-atomized Al 6061 powders – Effects of heat treatment

Cited by 18 publications

References 50 publications

Ni-doped Al2O3 sensor for effective SO3 gas adsorption and sensing

Ni-doped Al2O3 sensor for effective SO3 gas adsorption and sensing

Thermal Preprocessing of Rapidly Solidified Al 6061 Feedstock for Tunable Cold Spray Additive Manufacturing

Application of Fe-Based Amorphous Alloy in Industrial Wastewater Treatment: A Review

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Product

Resources

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Ni-doped Al₂O₃ sensor for effective SO₃ gas adsorption and sensing

Ni-doped Al₂O₃ sensor for effective SO₃ gas adsorption and sensing