Effect of Atomization Gases on the Elastic Modulus of Thermal-sprayed NiCr Coatings

Guanglin, Nie; Bao, Yiwang; Wan, Detian; Liu, Xiaogen

doi:10.1016/s1875-5372(18)30114-0

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…However, chromium can be identified in the XRD pattern if peaks are detected at 2è values of 44.4°, 64.6°, and 81.72° matching to (110), (200), and (211) crystal planes, respectively (JCDPS #06-0694). Interestingly, the obtained 2è values at 43.9°, 51.2°, and 75.7° match well with (111), (200), and (220) of Cr 2 Ni 3 (JCPDS # 65-629; Cr 2 Ni 3 ) [47]. The same results were obtained for all formulations.…”

Section: Resultssupporting

confidence: 78%

Electrospun Bimetallic NiCr Nanoparticles@Carbon Nanofibers as an Efficient Catalyst for Hydrogen Generation from Ammonia Borane

et al. 2019

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In this study, we report on the fabrication and utilization of NiCr alloy nanoparticles (NPs)-decorated carbon nanofibers (CNFs) as efficient and competent non-precious catalysts for the hydrolytic dehydrogenation of ammonia borane (AB) at 25 ± 2 °C. The introduced NFs have been fabricated in one step using a high-temperature thermal decomposition of the prepared electrospun nanofiber mats (nickel acetate tetrahydrate, chromium acetate dimer, and polyvinyl alcohol) in an inert atmosphere. The chemical composition of the NFs with different proportions of Ni1−xCrx (x = 0.0, 0.1, 0.15, 0.2, 0.25, 0.3) was established via standard characterization techniques. These techniques proved the formation of disorder Cr2Ni3 alloy and carbon for all the formulations. The as-synthesized composite NFs exhibited a higher catalytic performance for AB dehydrogenation than that of Cr-free Ni–CNFs. Among all the formulations, the sample composed of 15% Cr shows the best catalytic performance, as more H2 was released in less time. Furthermore, it shows good stability, as it is recyclable with little decline in the catalytic activity after six cycles. It also demonstrates the activation energy, entropy (ΔS), and enthalpy (ΔH) with 37.6 kJ/mole, 0.094 kJ/mole, and 35.03 kJ/mole, respectively. Accordingly, the introduced catalyst has a lower price with higher performance encouraging a practical sustainable H2 energy application from the chemical hydrogen storage materials.

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Section: Resultssupporting

confidence: 78%

Electrospun Bimetallic NiCr Nanoparticles@Carbon Nanofibers as an Efficient Catalyst for Hydrogen Generation from Ammonia Borane

et al. 2019

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“…In practice, the most common method of spraying liquids is hydraulic spraying, pneumatic spraying, dual-liquid spraying [1], electrostatic spraying [2], pressurized spraying [3], and ultrasonic spraying [4][5][6]. This variety of spraying methods is caused by the requirements of specific technological applications: in some cases, high dispersion and a narrow droplet size distribution are required; in others, a certain spray geometry is required; and in others, a stable spray speed, etc., is required.…”

Section: Introductionmentioning

confidence: 99%

The Development and Analysis of a Multistage Spraying Method for Liquids in an Ultrasonic Field

Shalunov,

Khmelev,

Terentiev

et al. 2024

Applied Sciences

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Spraying various liquids (primarily aqueous solutions of various substances) is widely used in various technological processes. For most of them, high dispersibility and a narrow droplet size distribution are essential. Ultrasonic spraying allows these parameters to be achieved. However, the higher the dispersity of droplets produced by ultrasonic spraying, the lower the spray productivity. To solve this problem, we propose a method of multistage spraying, consisting of the generation of a large number of particles of large initial size (to ensure high productivity) and their subsequent destruction by propagation in a periodic ultrasonic field (to ensure small droplet sizes at high productivity). To experimentally determine the capabilities of this technique, a tubular emitter in the shape of a cylinder with a stepped-variable cross-section was designed. The configuration of the ultrasonic field inside the emitter (22.2 kHz; 182 dB) implements three-stage spraying (the number of sputtering stages corresponds to the number of anti-nodes along the emitter axis). The effectiveness of the proposed and developed technique, suitable for the generation of droplets smaller than 40 µm, with performance exceeding the known ultrasonic spray techniques by at least 10-fold, was confirmed in the course of the conducted research.

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“…[1][2][3]. In practice, the most common applications of spraying liquids are hydraulic spraying, pneumatic spraying, dual-liquid spraying [4], electrostatic spraying [5], pressurized spraying [6], and ultrasonic spraying [7][8][9]. Ultrasonic spraying offers a number of significant advantages among the used techniques, because it provides a minimum size variation of generated droplets relative to mean value, does not require additives, such as surfactants or emulsifiers and facilitates spraying highly viscous liquids with minimized consumption of energy [10].…”

Section: Introductionmentioning

confidence: 99%

Development and Analysis of Multistage Spraying of Liquids in Ultrasonic Field

Shalunov,

Khmelev,

Terentiev

et al. 2023

Preprint

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Spraying various liquids (primarily aqueous solutions of various substances) is widely used in various technological processes. For most of them, high dispersibility and narrow droplet size distribution are essential. This facilitates ultrasonic spray technique. However, the higher the dispersity of droplets produced by ultrasonic spray, the lower the spray productivity. To solve this problem, we proposed a method of multistage spraying, consisting in generation of a large number of particles of large initial size (to ensure high productivity) and their subsequent destruction by propagation in a periodic ultrasonic field (to ensure small droplet sizes at high productivity). To experimentally determine the capabilities of this technique, a tubular emitter in the shape of a cylinder of stepped-variable cross-section was designed. Configuration of the ultrasonic field inside the emitter (22.2 kHz; 182 dB) implements three-stage spraying (the number of sputtering stages corresponds to the number of anti-nodes along the emitter axis). The effectiveness of proposed and developed technique suitable for generation of droplets sized less than 40 µm with performance exceeding the known ultrasonic spray techniques at least 10 times has been confirmed in the course of conducted research.

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Effect of Atomization Gases on the Elastic Modulus of Thermal-sprayed NiCr Coatings

Cited by 5 publications

References 20 publications

Electrospun Bimetallic NiCr Nanoparticles@Carbon Nanofibers as an Efficient Catalyst for Hydrogen Generation from Ammonia Borane

Electrospun Bimetallic NiCr Nanoparticles@Carbon Nanofibers as an Efficient Catalyst for Hydrogen Generation from Ammonia Borane

The Development and Analysis of a Multistage Spraying Method for Liquids in an Ultrasonic Field

Development and Analysis of Multistage Spraying of Liquids in Ultrasonic Field

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