Investigation of Influence of Pulsed Deuterium Plasma on Surface of Chromium-manganese Steel with Use of Multifractal Parameterization

Колмаков, А. Г.; Пименов, В. Н.; Belousova, E. L.; Baranov, E. E.; Грибков, В. А.; Dubrovsky, A. V.; Maslyaev, S. A.

doi:10.1515/htmp.2009.28.1-2.83

Cited by 4 publications

(2 citation statements)

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“…It is known from the experiments that due to plasma irradiation on the surface of tungsten, a mesh of cracks with different characteristic sizes (at least 3 scales) will develop [20], which refers to the self-similarities in the defects. As the interaction of plasma with materials surface is stochastic in nature, the fractal and multifractal analysis should be the natural choice of surface description [17,[21][22][23][24][25]. The fractal and multifractal formalism have been used successfully for characterization of the surface, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Multifractal analysis of high-temperature plasma irradiated tungsten surfaces

Martsepp¹,

Laas²,

Laas³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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In this research, the irregular surface structure of 15 pure tungsten specimens that are irradiated respectively with 20, 40, 60, 80, and 100 shots of high-temperature deuterium plasma are under observation. The box-counting method is used to evaluate the scanning electron microscope (SEM) images taken from different locations within the same specimen. Obtained multifractal characteristics are then compared with the Fourier spectrum of stochastic relief. As a result, it is possible to determine the time dependence of surface damage with the box-counting method, but additional tests should be performed with the Fourier method to confirm this regularity. Besides, it has been studied further whether and how the fractal characteristics change with different magnifications within the same specimen. It was found that when selecting the appropriate magnification for SEM, X500 for a given specimen, the multifractal analysis of the arbitrarily selected image of surface damage well represents the average situation on the specimen.

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Section: Introductionmentioning

confidence: 99%

“…on thin films [24,25], or surface defects due to different damaging phenomena, e.g. influence of stochastic plasma flows [10,17,23,26]. It has been found that multifractal spectra may vary greatly in the case of the plasma-facing materials (PFM) with a slightly different percentage of dopants irradiated in the conditions [14].…”

Section: Introductionmentioning

confidence: 99%