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Composition analysis of thin films formed on beryllium surfaces under pulsed laser action by the method of chemical thermodynamics

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Abstract

The thermodynamic approach to determine the phase-chemical composition of thin films formed on the beryllium surface under laser exposure in air and nitrogen gas environments is suggested. Laser marking in a gas environment is used to create contrast patterns on beryllium which is a base material for spherical rotors of the electrostatic gyro. According to thermodynamical calculations of isobaric-isothermal potentials (Gibbs thermodynamic potentials) and kinetic analysis of the chemical reactions, a formation of Be3N2 in nitrogen and BeO in air atmosphere during laser marking of beryllium has the highest probability. As a result, it is possible to control the conductivity of the laser-marked patterns by changing the content and partial pressures of the components of the gas environment. Simulated results agree with the experimental data provided by X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning probe microscopy (conductivity).

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Funding

This work was financially supported by Government of Russian Federation (Grant 08-08).

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Authors and Affiliations

  1. ITMO University, 49 Kronverksky Pr., St. Petersburg, Russian Federation

    Olga Yulmetova

  2. Concern CSRI Elektropribor, JSC, 30 Malaya Posadskaya Str., St. Petersburg, Russian Federation, 197046

    Olga Yulmetova & Aleksandr Scherbak

Authors
  1. Olga Yulmetova
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  2. Aleksandr Scherbak
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Correspondence to Olga Yulmetova.

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Yulmetova, O., Scherbak, A. Composition analysis of thin films formed on beryllium surfaces under pulsed laser action by the method of chemical thermodynamics. Int J Adv Manuf Technol 97, 3231–3236 (2018). https://doi.org/10.1007/s00170-018-2216-2

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  • DOI: https://doi.org/10.1007/s00170-018-2216-2

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