Nanostructuring of Metals, Alloys, and Composites

Cavaliere, Pasquale

doi:10.1007/978-3-030-58088-9_1

Cited by 2 publications

(3 citation statements)

References 95 publications

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“…This Gap 2 sub-band can be interpreted as the sensitive absorption band energy for optical transitions in ZnCo 2 O 4 . When the crystallite size is reduced, there will be a greater grain boundary area, 24 which will form an over-doping effect and affect the conductive characteristics. In terms of carrier concentration, it can be observed that the undoped carrier concentration is the lowest at 2.54 × 10 15 cm −3 , and with the doping of calcium in ZnCo 2 O 4 , the carrier concentration increases to the orders of 10 16 and 10 17 .…”

Section: Resultsmentioning

confidence: 99%

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo₂O₄ Thin Films

Hwang,

Lin,

Kaneko

et al. 2024

ECS J. Solid State Sci. Technol.

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In the preparation of Zn(Co1−xCax)2O4 thin films with doping content ratio Cax = 0.00–0.20, analysis shows that no impurity phase is formed in spinel-structure thin films, while doping calcium reduces the grain size of the thin films and the planarization of the surface microstructure. Increasing the doping content ratio of calcium will reduce the ability of the film to absorb blue and ultraviolet light, and reduce the characteristic absorption of ZnCo2O4. The energy gap of Zn(Co1−xCax)2O4 film increases from 2.46 eV at Cax = 0.00 to 2.51 eV at Cax = 0.15. Moreover, doping Ca+2 to replace Co+3 increases the conductivity and carrier concentration, for which the optimal doping ratio is Cax = 0.07. The film resistivity decreases from 270.5 Ω-cm (undoped) to 15.4 Ω-cm (Cax = 0.07) and the carrier concentration increases from 2.54×10e15 (undoped) to 6.25×10e17 cm−3 (Cax = 0.07). Under UV light irradiation and in an environment without any light source, the film exhibits anti–E. coli resistance as high as 99.94% and 99.99%. Thus, P-type Zn(Co1−xCax)2O4 films can be used for antibacterial and electronic components.

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Section: Resultsmentioning

confidence: 99%

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo₂O₄ Thin Films

Hwang,

Lin,

Kaneko

et al. 2024

ECS J. Solid State Sci. Technol.

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“…Nanostructured (NS) aluminum alloys produced from mechanical alloying, severe plastic deformation, and electrodeposition are considered as potential candidates to be used in lightweighting applications at elevated temperatures due to the combined effect of ultrafine grains and nanoparticles [60,61]. Several types of NS aluminum alloys have been developed [62].…”

Section: Nanostructured Aluminum Alloymentioning

confidence: 99%

“…Al-Cu alloys [33][34][35][36], metal-matrix composites [37][38][39][40][41][42][43][44][45], and additively manufactured aluminum [46][47][48][49][50][51][52] can be used as selective reinforcement materials. Nano-structured aluminum [60][61][62][63][64][65][66][67][68][69] can be used as inserts to improve the creep resistance of the aluminum diesel engine in the inter-valve zone if the thermal stability can be improved. An integrated technology similar to the one that has been proposed for the integration of AM parts into subtractive production processes [82] can be used by employing robot arms to move inserts, molds, and molten alloy to produce the component.…”

Section: The Manufacturing Of the Aluminum Diesel Enginementioning

confidence: 99%

Recent Progress in Creep-Resistant Aluminum Alloys for Diesel Engine Applications: A Review

Arriaga-Benitez,

Pekguleryuz

2024

Materials

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Diesel engines in heavy-duty vehicles are predicted to maintain a stable presence in the future due to the difficulty of electrifying heavy trucks, mine equipment, and railway cars. This trend encourages the effort to develop new aluminum alloy systems with improved performance at diesel engine conditions of elevated temperature and stress combinations to reduce vehicle weight and, consequently, CO2 emissions. Aluminum alloys need to provide adequate creep resistance at ~300 °C and room-temperature tensile properties better than the current commercial aluminum alloys used for powertrain applications. The studies for improving creep resistance for aluminum casting alloys indicate that their high-temperature stability depends on the formation of high-density uniform dispersoids with low solid solubility and low diffusivity in aluminum. This review summarizes three generations of diesel engine aluminum alloys and focuses on recent work on the third-generation dispersoid-strengthened alloys. Additionally, new trends in developing creep resistance through the development of alloy systems other than Al-Si-based alloys, the optimization of manufacturing processes, and the use of thermal barrier coatings and composites are discussed. New progress on concepts regarding the thermal stability of rapidly solidified and nano-structured alloys and on creep-resistant alloy design via machine learning-based algorithms is also presented.

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Nanostructuring of Metals, Alloys, and Composites

Cited by 2 publications

References 95 publications

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo₂O₄ Thin Films

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo₂O₄ Thin Films

Recent Progress in Creep-Resistant Aluminum Alloys for Diesel Engine Applications: A Review

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Nanostructuring of Metals, Alloys, and Composites

Cited by 2 publications

References 95 publications

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo2O4 Thin Films

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo2O4 Thin Films

Recent Progress in Creep-Resistant Aluminum Alloys for Diesel Engine Applications: A Review

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Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo₂O₄ Thin Films

Material and Antibacterial Properties of Spinel-Structure Ca-Doped ZnCo₂O₄ Thin Films