Ablation of oxide materials and production of nanopowders by ytterbium fiber laser

Осипов, В. В.; Lisenkov, V. V.; Platonov, V. V.

doi:10.1007/s00339-014-8928-8

Cited by 7 publications

(9 citation statements)

References 22 publications

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“…As shown in figures 2(a) and (b), at the beginning of the pulse (first 200 µs), a laser plume is forming (as a column), and its dynamics is qualitatively the same as that observed for the YSZ and Nd:YAG targets evaporation by CO 2 laser pulses in the air [2]. However, after ≈200 µs from the evaporation starts, the laser plume begins to develop differently than in the case of CO 2 laser.…”

Section: Discussionsupporting

confidence: 56%

“…For different conditions, the part of droplets and target fragments was in the interval of 28-46 wt.%. The majority of the droplets (85%-93%) were deposited in the evaporation chamber of the setup for obtaining nanopowder [2]; therefore, the powder from this location was taken for subsequent analysis of droplet's size and weight. In figure 3, the photographs of the particles of the coarse fraction collected in the evaporation chamber after the evaporation of the target are presented.…”

Section: Resultsmentioning

confidence: 99%

“…Perhaps, a reduction of the micro-fraction amount is partially compensated by some growth of fragments content because of increased the diameter of the crater. An important factor is that, during the nanopowder preparation process, the target surface becomes highly rough [2]. This phenomenon leads to an uncontrolled reduction of power density on the irregularities sloping walls, in compariso n with the case of a flat target surface.…”

Section: Resultsmentioning

confidence: 99%

“…The intensity of the laser radiation on the target was different. The experimental setup for obtaining the nanopowder was described in [2].…”

Section: Methodsmentioning

confidence: 99%

“…One of the applications of a fiber laser is the production of nanopowders. Experimental and theoretical studies on the effects of a repetitively pulsed CO 2 laser and a fiber laser for the generation of nanopowders are described in [1][2][3]. A compariso n of the results of the action of the radiation of these lasers indicated the reasons to use a fiber ytterbium laser for obtaining nanopowders, the most important of which are as follows:…”

Section: Introductionmentioning

confidence: 99%

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Characteristic properties of laser ablation of translucent targets

et al. 2018

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This study reveals the characteristic features of the laser ablation of the solid Nd:Y 2 O 3 targets, such as the dynamics of the laser plume, the crater depth, and the weight and size distribution of liquid melt droplets. The ablation was initiated by the ytterbium fiber laser radiation pulses with constant energy (0.67 J) and with different power densities. The dependence on the power density of such parameters as the injection time of drops, mass distribution of drops, crater depth, and productivity of synthesis of nonopowder was revealed. To explain the formation of deep craters a model was proposed, stating that the formation of liquid droplets is a consequence of the Kelvin-Helmholtz instability's appearing and developing on the border between the liquid melt on the crater's wall and the vapor flow from the crater. The increment of this instability and its characteristic size was determined.

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Section: Discussionsupporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The intensity of the laser radiation on the target was different. The experimental setup for obtaining the nanopowder was described in [2].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%