Influence of Grain Size on Resistance to Ion Sputtering of Mirrors From Low Chromium-Zirconium Copper Alloy

Belyaeva, A. I.; Коленов, И. В.; Savchenko, A. A.; Галуза, А. А.; Аксенов, Д. А.; Raab, G. I.; Faizova, C.N.; Voitsenya, V.S.; Konovalov, V.G.; Ryzhkov, I. V.; Skorik, O.A.; Solodovchenko, S. I.; Bardamid, A. F.

doi:10.21517/0202-3822-2011-34-4-50-59

Cited by 3 publications

(3 citation statements)

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“…The optical investigations included direct measurements of specular reflectance R(λ) at normal light incidence within 220÷650 nm spectral range [4] and measurements of ellipsometric parameters (Ψ and ) within 450÷760 nm spectral range [8]. To investigate optical constants multi-angle ellipsometry was used [9] due to its sensitivity to surface structure modifications.…”

Section: Methodsmentioning

confidence: 99%

Effect of sputtering on self-damaged recrystallized W mirror specimens

Voitsenya

Balden

Belyaeva

et al. 2013

Journal of Nuclear Materials

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The effect of heavy sputtering and of neutron irradiation simulated by displacement damaging with of 20 MeV W 6+ ions on the optical properties of tungsten mirrors was studied. Ar + ions with 600 eV of energy were used as imitation of charge exchange atoms ejected from fusion plasma. The ion fluence dependence of the surface topography and the optical properties of polycrystalline, recrystallized tungsten (grain size 20 -100 µm) were studied by optical microscopy, interferometry, reflectrometry and ellipsometry. Furthermore, after sputtering in total a layer of 3.9 μm in thickness, the orientation and the thickness of the eroded layer of many individual grains was determined by electron backscattering diffraction and confocal laser scanning microscopy. Concluding from the obtained data the neutron irradiation, at least at the damage level would be achieved in ITER, has not to make an additional contribution in the processes developing under impact of charge exchange atoms only.

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Section: Methodsmentioning

confidence: 99%

Effect of sputtering on self-damaged recrystallized W mirror specimens

Voitsenya

Balden

Belyaeva

et al. 2013

Journal of Nuclear Materials

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“…The current density was 2.8 mA/cm 2 , the thickness of the sputtered layer reached Δh ~ 4.6 μm. Details of results can be found in [7].…”

Section: Copper Alloy Mirrorsmentioning

confidence: 99%

“…In the present paper, we compile and analyze the results of some of our experiments on this subject (in [5][6][7] and some new data) and make comparisons with numerical simulations of surface roughness development on polycrystalline materials with single-or multi-sized grains having randomly distributed crystal orientation.…”

Section: Introductionmentioning

confidence: 99%

Development of surface relief on polycrystalline metals due to sputtering

Voitsenya

Balden

Bardamid

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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The characteristics of surface microrelief that appear in sputtering experiments with polycrystalline metals of various grain sizes have been studied. Specimens with grain sizes varying from 30 -70 nm in the case of crystallized amorphous alloys, to 1 -3 µm for technical tungsten grade and 10 -100 μm for recrystallized tungsten were investigated. A model is proposed for the development of roughness on polycrystalline metals which is based on the dependence of sputtering rate on crystal orientation. The results of the modeling are in good agreement with experiments showing that the length scale of roughness is much larger than the grain size. Voitsenya et al.Surface relief due to sputtering of polycrystalline metals

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Effect of deformation nanostructuring on ion-beam erosion of copper

Andrianova,

Borisov,

Ovchinnikov

et al. 2024

Poverhnostʹ. Rentgenovskie, sinhrotronnye i nejtronnye issledov

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The effect of deformation nanostructuring on ion-beam erosion of copper at high fluences of irradiation with 30 keV argon ions was experimentally studied. Deformation nanostructuring by high-pressure torsion was used to form an ultrafine grained structure with a grain size of ~0.4 µm in copper samples with an initial grain size about 2 µm. It was found that when a layer of thickness comparable to the grain size was sputtered, a steady-state cone-shaped relief was formed on the copper surface, the appearance of which did not change with increasing irradiation fluence. It has been shown that the smaller the grain size in copper, the greater the concentration and the smaller the cone height on the surface. The cone inclination angles, close to 82°, as well as the sputtering yield of 9.6 at./ion, practically does not depend on the copper grain size, the thickness of the sputtered layer, and the irradiation fluence. Calculations using the SRIM code showed that when taking into account the sputtering of atoms from the walls of the cones, the sputtering yield of a cone-shaped copper relief Үc, was 3.5 times less than the yield of a single cone, 1.2 times greater than the sputtering yield of a smooth surface, and the value of 9.25 at./ion was close to the experimentally measured one.

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Influence of Grain Size on Resistance to Ion Sputtering of Mirrors From Low Chromium-Zirconium Copper Alloy

Cited by 3 publications

References 10 publications

Effect of sputtering on self-damaged recrystallized W mirror specimens

Effect of sputtering on self-damaged recrystallized W mirror specimens

Development of surface relief on polycrystalline metals due to sputtering

Effect of deformation nanostructuring on ion-beam erosion of copper

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