This article is cited in 1 paper

Interaction of laser radiation with matter. Laser plasma

Effect of focused nanosecond laser pulse irradiation on microtribological properties of diamond-like films

V. D. Frolov^a, P. A. Pivovarov^a, E. V. Zavedeev^a, M. L. Shupegin^b, S. M. Pimenov<sup>a

a</sup> Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
^b National Research University "Moscow Power Engineering Institute"

Abstract: We have examined the effect of focused nanosecond laser pulses on the formation and tribological properties of microstructures in the form of a matrix of craters produced in a – C : H : Si : O diamond-like films (DLFs), both undoped and doped with tungsten. The studies are performed by scanning probe microscopy (SPM) using SPM probes of standard design with a tip and probes without a tip (tipless-type probes). A special procedure is developed for assessing the wettability (contact angle) of individual sections of the laser-induced microstructure by the local adhesion force. According to estimates, the material inside the crater becomes softer and more hydrophobic as a result of laser irradiation. This is manifested to the greatest extent in tungsten-doped DLFs, where the crater walls are arranged like terraces formed by 'nanoflakes', i.e. grains of the substance. Scanning of microstructures with a tipless probe in the regime of lateral force microscopy demonstrates a decrease in friction in the crater area.

Keywords: nanosecond laser pulses, diamond-like film, microstructure, microtribological properties.

Received: 09.12.2019
Revised: 13.01.2020

 English version: Quantum Electronics, 2020, 50:8, 750–755

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