Plasma spraying of Al2O3–WO3 composite coatings

Matthews, Steven

doi:10.1016/j.surfcoat.2012.01.043

Cited by 6 publications

(1 citation statement)

References 23 publications

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“…For this reason JET will offer new opportunities for the development of the hybrid scenario. However it is important to note that in JET with the full metal Be/W wall, higher gas fuelling rates are required compared to the JET with the CFC wall, in order to minimize heavy impurity influx and increased core radiation [54]. The higher density as a result of the required increased fuelling level will rule out the hot ion regime that was observed in the low-triangularity hybrid plasmas in this paper in JET with the carbon wall.…”

Section: Discussionmentioning

confidence: 92%

Comparison of hybrid and baseline ELMy H-mode confinement in JET with the carbon wall

Beurskens

Frassinetti²,

Challis

et al. 2012

Nucl. Fusion

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This paper compares the confinement in JET low and high triangularity hybrid and baseline ELMy H-mode regimes in a large database of 112 plasmas and identifies the location and source for the enhanced confinement factors in the hybrid plasmas. JET hybrid plasmas feature enhanced performance, and typically have b N~2 .5-3, H 98 < 1.5 compared to baseline H-mode plasmas, which typically have b N~1 .5-2, H 98 ~1. The higher global pressure achieved in hybrid plasmas is obtained through a tight coupling of the core and pedestal pressures. The confinement in hybrid plasmas is therefore strongly linked to the obtainable pedestal confinement. A comparison of the EPED1 predictive pedestal model with the experimental pedestal pressures shows good agreement of the model predictions with the measured data, offering a possible explanation for the tight link between global and pedestal pressure through the stabilising effect of high b on the pedestal MHD stability. The electron kinetic profiles do not show a net profile peaking of the electron pressure, although the electron density and temperature show respectively decreasing and increasing trends with collisionality. Hence the confinement benefit from the electron profile peaking as reported in previous studies [most recently in M. Maslov et al., Nucl. Fusion 49] is not confirmed by the current study. Both low and high triangularity hybrid plasmas feature T i /T e > 1 across the entire profile leading to a confinement benefit through the ions. Additional performance is obtained in the low triangularity hybrid plasmas through increased ion temperature profile peaking at low collisionality.

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Section: Discussionmentioning

confidence: 92%

Comparison of hybrid and baseline ELMy H-mode confinement in JET with the carbon wall

Beurskens

Frassinetti²,

Challis

et al. 2012

Nucl. Fusion

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High-Temperature Oxidation Behavior of Refractory High-Entropy Alloys: Effect of Alloy Composition

et al. 2017

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The high temperature oxidation behavior of a new family of refractory high entropy alloys (HEAs) with compositions of W-Mo-Cr-Ti-Al, Nb-Mo-Cr-Ti-Al and Ta-Mo-Cr-Ti-Al was studied at 1000°C and 1100°C. Based on these equimolar starting compositions, the main incentive of this study was to select the most promising alloy system whose properties may then be successively improved. Despite the high amount of refractory elements, all HEAs studied here showed good oxidation resistance at least during 48h of air exposure at 1000°C and 1100°C. Moderate values of mass gain and complex oxidation kinetics were observed for the W-and Nb-containing HEAs. These alloys formed inhomogeneous oxide scales possessing regions with thick and porous layers as well as areas revealing quite thin oxide scales due to the formation of discontinuous Cr-and Al-rich scales. The most promising behavior, though, was shown by the alloy Ta-Mo-Cr-Ti-Al which followed the parabolic rate law for oxide growth due to the formation of a thin and compact Al-rich layer.

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An efficient method for enhancing adhesion and uniformity of Al2O3 coatings on nickel micro-foam used in micropacked beds

Sang

Duan

et al. 2021

Chinese Journal of Chemical Engineering

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Plasma spraying of Al2O3–WO3 composite coatings

Cited by 6 publications

References 23 publications

Comparison of hybrid and baseline ELMy H-mode confinement in JET with the carbon wall

Comparison of hybrid and baseline ELMy H-mode confinement in JET with the carbon wall

High-Temperature Oxidation Behavior of Refractory High-Entropy Alloys: Effect of Alloy Composition

An efficient method for enhancing adhesion and uniformity of Al2O3 coatings on nickel micro-foam used in micropacked beds

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