A possible thermodynamic mechanism of craters formation on metal surfaces caused by intense pulsed ion beams

Yan, Sha; Le, Xinyi; Zhao, Wenzhi; Xue, Jianming; Wang, Y.G.

doi:10.1016/j.surfcoat.2004.07.063

Cited by 17 publications

(10 citation statements)

References 9 publications

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“…These objects were uniformly distributed on the surface; no special direction can be distinguished. According to Yan et al (2005), the craters formation can be due to three mechanisms:…”

Section: Resultssupporting

confidence: 90%

“…These objects were uniformly distributed on the surface; no special direction can be distinguished. According to Yan et al (2005), the craters formation can be due to three mechanisms: (i) the molten alloy has high liquidity and high surface tension -small pores may be sealed (ii) the molten alloy is more viscous -the pore will be smoothed and blurred (iii) the molten alloy is quite viscous and a pore diameter is big enough -the pore may enlarge by small voids produced by new rapid heating process. Figure 2 presents some kinds of craters formed at the surface during the modification of samples used in this experiment.…”

Section: Methodsmentioning

confidence: 99%

“…The possibility of application of pulsed energy to modify the near surface regions of technical materials attracts attention of many groups all over the world. Pulsed energy can be delivered to the surface of a given material by laser, electron, ion and plasma beams (Poate et al , 1981; Piekoszewski et al , 2001; Pereira et al , 2004; Guan et al , 2005; Sartowska et al , 2005; Yan et al , 2005). Thus far, the most advances being achieved using lasers as sources for high‐energy flows.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of melting of the surface layer followed by rapid solidification with a cooling rate on the level of 10 7 -10 10 K s −1, usually significant changes occur in surface morphology. Some papers reported this phenomenon, but craters formation mechanism is still studied for example by Yan et al (2005) and Shulov et al (2007).…”

Section: Introductionmentioning

confidence: 99%

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Surface morphology of unalloyed steels remelted with intense plasma pulses

Sartowska

Piekoşzewski

Waliś

et al. 2010

Journal of Microscopy

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SummaryThe set of unalloyed steels with various carbon concentrations were irradiated with intense plasma pulses with following process parameters: energy density 5 J cm −2 , pulse duration 2 μs, argon or nitrogen atmosphere. The energy density of each pulse was high enough to melt the surface layer of material. The cooling rate was estimated for 10 8 K s −1 using the modelling method which takes into account heat evolution in the iron sample. Samples were characterized using the scanning electron microscopy technique for remelted surface morphology investigations. The tests with profilometer allowed us to investigate the changes of roughness of the surface layers.

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“…These objects were uniformly distributed on the surface; no special direction can be distinguished. According to Yan et al (2005), the craters formation can be due to three mechanisms:…”

Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surface morphology of unalloyed steels remelted with intense plasma pulses

Sartowska

Piekoşzewski

Waliś

et al. 2010

Journal of Microscopy

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“…11f), the craters formed. There are many rea-sons for the generation of craters (such as the preferential vaporization of low melting point elements [59,60] or the hitting of impurities from ion source diode on the material surface [61], etc. ), but there is no unified statement so far.…”

Section: The Effects Of Hipib Irradiation On Microstructure Surface Morphology and Mechanical Property Of Cocrfemnni Heamentioning

confidence: 99%

Study on thermal shock irradiation resistance of CoCrFeMnNi high entropy alloy by high intensity pulsed ion beam

Zhang

et al. 2022

Journal of Nuclear Materials

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In recent years, high entropy alloys (HEAs) have attracted significant attention due to their excellent physical, chemical, mechanical properties, and good irradiation resistance, thus are considered as potential candidates for fission and fusion structural applications. CoCrFeMnNi HEA was irradiated by high intensity pulsed ion beam (HIPIB) to investigate the effects of thermal shock irradiation on its microstructure, surface morphology and mechanical properties. It was found that CoCrFeMnNi HEA maintained the face-centered cubic single-phase structure after HIPIB irradiation. The ion beam effect of irradiation produced numerous defects such as vacancies and stacking faults within the range of carbon ions. While the thermal effect reduced vacancy concentration beyond the ion range by promoting the recombination of vacancies with interstitials, and decreased the nano-hardness of CoCrFeMnNi HEA. The thermal effect and shock wave effect promoted the migration of vacancies and formed defects such as stacking faults etc. far beyond the ion range in CoCrFeMnNi HEA. Because of the very compositional complexity, the high-level chemical disorder and local lattice distortion of CoCrFeMnNi HEA, the lattice parameter was almost unchanged after HIPIB irradiation. Even if the temperature reached the melting point of CoCrFeMnNi HEA, there was no crack on the surface after surface remelting and rapid cooling. CoCrFeMnNi HEA showed good thermal stability and thermal shock irradiation resistance..

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