New applied technology of plasma heat sources

Kobayashi, Akiko

doi:10.1080/09507119009447723

Cited by 34 publications

(4 citation statements)

References 17 publications

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“…This unique technique was previously used to deposit high quality ceramics coatings [24][25][26][27] due to its high power and high spraying efficiency. The deposition was carried out on 304 stainless steel at different spraying distances and arc currents.…”

Section: Introductionmentioning

confidence: 99%

Influence of spray parameters on the microstructure and mechanical properties of gas-tunnel plasma sprayed hydroxyapatite coatings

Morks¹,

Kobayashi²

2007

Materials Science and Engineering: B

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Section: Introductionmentioning

confidence: 99%

Influence of spray parameters on the microstructure and mechanical properties of gas-tunnel plasma sprayed hydroxyapatite coatings

Morks¹,

Kobayashi²

2007

Materials Science and Engineering: B

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“…9 The performances were clarified in the previous studies. As the gas tunnel type plasma jet 10-12 is superior to the properties of other conventional type plasma jets, this plasma has great possibilities for various applications in thermal processing.…”

Section: Introductionmentioning

confidence: 97%

Effect of Zr on Microstructure of Metallic Glass Coatings Prepared by Gas Tunnel Type Plasma Spraying

Kobayashi

Kuroda

Kimura

et al. 2012

j. nanosci. nanotech.

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Metallic glass is one of the most attractive advanced materials, and many researchers have conducted various developmental research works. Metallic glass is expected to be used as a functional material because of its excellent physical and chemical functions such as high strength and high corrosion resistance. However, the application for small size parts has been carried out only in some industrial fields. In order to widen the industrial application fields, a composite material is preferred for the cost performance. In the coating processes of metallic glass with the conventional deposition techniques, there is a difficulty to form thick coatings due to their low deposition rate. Thermal spraying method is one of the potential candidates to produce metallic glass composites. Metallic glass coatings can be applied to the longer parts and therefore the application field can be widened. The gas tunnel plasma spraying is one of the most important technologies for high quality ceramic coating and synthesizing functional materials. As the gas tunnel type plasma jet is superior to the properties of other conventional type plasma jets, this plasma has great possibilities for various applications in thermal processing. In this study, the gas tunnel type plasma spraying was used to form the metallic glass coatings on the stainless-steel substrate. The microstructure and surface morphology of the metallic glass coatings were examined using Fe-based metallic glass powder and Zr-based metallic glass powder as coating material. For the mechanical properties the Vickers hardness was measured on the cross section of both the coatings and the difference between the powders was compared.

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“…Right after the deposition of TiC films (around 1960), TiN followed very shortly [11][12][13][14]. However, due to the low efficiency of deposition, the thicknesses of these coatings are very thin (<10 mm) [15]. Works [16,17] show that the performances of TiN coating depend on its thickness; for example, the thicker the TiN coating, the better the wear resistance and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Improving the Efficiency of Air Plasma Spraying of Titanium Nitride Powder

et al. 2022

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The operation modes of a plasmatron for powder coating spraying have been studied. The plasmatron has a node of annular input and a gasdynamic focusing of the powder, and the outlet holes of the nozzle-anode are made in the form of rectangular narrowing-expanding channels (No.34334 RK: IPC H05H 1/42). The dynamics and trajectories of the powder particles in the plasmatron were investigated. The paper analyzes the influence of plasmatron arc current and working gas flow rate on the structure and properties of the obtained coatings. It is established that the phase composition of the sprayed coatings and the initial powder is the same: the main phase is the compound TiN, in addition, the structure contains the phase TiO2. The results of tribological tests of the coatings under dry friction conditions according to the ball-on-disk scheme are presented. Within the framework of this study, it can be said, from the point of view of obtaining denser coatings with high performance characteristics, that the optimal modes of plasma spraying of TiN powder are a current of 250 A and the working gas flow rate of argon 34 L/min.

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New applied technology of plasma heat sources

Cited by 34 publications

References 17 publications

Influence of spray parameters on the microstructure and mechanical properties of gas-tunnel plasma sprayed hydroxyapatite coatings

Influence of spray parameters on the microstructure and mechanical properties of gas-tunnel plasma sprayed hydroxyapatite coatings

Effect of Zr on Microstructure of Metallic Glass Coatings Prepared by Gas Tunnel Type Plasma Spraying

Improving the Efficiency of Air Plasma Spraying of Titanium Nitride Powder

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