T91 cladding tubes with and without modified FeCrAlY coatings exposed in LBE at different flow, stress and temperature conditions

Weisenburger, A.; Heinzel, A.; Müller, Georg; Muscher, H.; Rousanov, A.

doi:10.1016/j.jnucmat.2008.02.026

Cited by 179 publications

(63 citation statements)

References 9 publications

(15 reference statements)

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“…It was also reported that a multilayer oxide film was formed without a protective alumina film at some places where the Al concentration in the coating layer produced by GESA treatment was below 4 mass%. 12) Our experimental results also indicate that the Al concentration of 2.8 mass% is low to produce an effective corrosion barrier in liquid LBE at 823 K.…”

Section: Resultssupporting

confidence: 58%

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Applicability of Al-Powder-Alloy Coating to Corrosion Barriers of 316SS in Liquid Lead-Bismuth Eutectic

et al. 2011

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A new Al-alloy coating method using Al, Ti and Fe powders has been applied to 316SS in order to develop corrosion resistant coating in liquid lead-bismuth eutectic (LBE). The 316SS plates with coating layers of different Al concentrations were exposed to liquid LBE with controlled oxygen concentrations of 10 À6 to 10 À4 mass% at 823 K for 3600 ks. While surface oxidation and grain boundary corrosion accompanied by liquid LBE penetration are observed in 316SS without Al-alloy coating, the Al-alloy coating is effective to protect such severe corrosion attacks in liquid LBE. Although the coating layer containing 2.8 mass% Al does not always keep sufficient corrosion resistance, good corrosion resistance is obtained through the Al-oxide film formed in liquid LBE in the coating layer where the average Al concentration is 4.2 mass%. Cracks are formed in the coating layer containing 17.8 mass% Al during the coating process. The Al-powder-alloy coating applied to 316SS is promising as a corrosion resistant coating method in liquid LBE environment.

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Section: Resultssupporting

confidence: 58%

“…Several Al-alloy coating methods have been proposed for development of corrosion resistant steels in liquid LBE. [10][11][12][13][14] The Al-alloy coating by a GESA (Gepulste Elektronenstrahlanlage) treatment 11,12) using a pulsed electron beam is known worldwide as a method to produce a thin and compact coating layer.…”

Section: Introductionmentioning

confidence: 99%

Applicability of Al-Powder-Alloy Coating to Corrosion Barriers of 316SS in Liquid Lead-Bismuth Eutectic

et al. 2011

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“…The influence of surface fused coating on the mechanical properties is investigated performing low-cycle--fatigue tests [8] and pressurized tubes [9]. Both tests do not show any negative response of such modified layer onto the mechanical properties.…”

Section: Application Of Modified Materialsmentioning

confidence: 99%

Intense Pulsed Electron Beams Application οf Modified Materials

Weisenburger

Engelko

et al. 2009

Acta Phys. Pol. A

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Intense pulsed electron beams have been applied for surface modification of materials in our laboratory for several years. An improvement of properties like wear, corrosion and oxidation resistance was found. Three different modification modes can be distinguished: rapid melting and solidification, surface alloying of coatings into the bulk and surface fusing of coatings to the bulk. All three surface treatment processes were investigated using the GESA (Gepulste Elektronen Strahl Anlage) facilities having following parameters: accelerating voltage 80-400 kV; power-density 2-6 MW/cm 2 ; beam diameter 4-10 cm; pulse duration 4-250 µs. Such pulses applied on material surfaces lead to a change in microstructure and in the case of surface alloying also to a change in chemical composition. This paper will give an overview on applications in different fields of surface modified materials.

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“…Numerous experiments with the electron accelerator GESA I and II [1,2] show excellent results regarding the improvement of the mechanical property and the enhancement of the corrosion resistance of the treated materials [3][4][5][6]. Especially surface alloying of Al into steels to increase the steel compatibility with liquid lead alloys was successfully demonstrated [6]. One application of this surface alloyed steels is their use as fuel cladding materials in nuclear reactors [6].…”

Section: Introductionmentioning

confidence: 99%

“…Especially surface alloying of Al into steels to increase the steel compatibility with liquid lead alloys was successfully demonstrated [6]. One application of this surface alloyed steels is their use as fuel cladding materials in nuclear reactors [6]. The next step leads to further technological adaptation of the process that especially was focused on the adaptation of the electron beam to the surface geometry.…”

Section: Introductionmentioning

confidence: 99%

Optical Investigation of Plasma Formation Process by Interaction of Intense Electron Beams with Metallic Targets

An¹,

Engelko²,

Mueller³

et al. 2009

Acta Phys. Pol. A

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Electron beams with energies ≥ 100 keV offer attractive possibilities to modify metallic surfaces. Numerous experiments with the electron accelerators GESA I and II showed excellent results regarding the improvement of mechanical properties and the enhancement of the corrosion resistance of the treated materials. The next step leads to further technological adaptation of the process that especially was focused on the adaptation of the electron beam to the surface geometry. For the treatment of the outer surface of tubes the electron beam facility GESA IV with a radial converged electron beam was designed. In first experiments unexpected electrical short-circuiting after different time periods occurred. Two major reasons could be identified: excessive plasma formation at the cathode and target plasma formation. The latter can be controlled by vacuum conditions and surface cleaning of the target, the first by controlling the duration of plasma formation at the cathode.

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T91 cladding tubes with and without modified FeCrAlY coatings exposed in LBE at different flow, stress and temperature conditions

Cited by 179 publications

References 9 publications

Applicability of Al-Powder-Alloy Coating to Corrosion Barriers of 316SS in Liquid Lead-Bismuth Eutectic

Applicability of Al-Powder-Alloy Coating to Corrosion Barriers of 316SS in Liquid Lead-Bismuth Eutectic

Intense Pulsed Electron Beams Application οf Modified Materials

Optical Investigation of Plasma Formation Process by Interaction of Intense Electron Beams with Metallic Targets

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