Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Radiation Hardening and Optical Properties of Materials based on SiO2

3/18/2021 2021 - #01 Physics in nuclear power engineering

Stepanov V.A. Demenkov P.V. Nikulina O.V.

DOI: https://doi.org/10.26583/npe.2021.1.13

In preliminary studies, it was shown that the optical absorption spectra of radiation-colored glasses are the spectra of optical losses due to scattering by optical inhomogeneities. Optical inhomogeneities in glasses of various compositions arise due to the radiation separation of the electric charge and polarization in nanosized structural elements.

The authors of this work prove that the radiation changes in the mechanical and optical properties of silica glasses are of the same nature. The performed estimates indicate that the separation of the electric charge in glasses occurs up to absorbed doses of about 1 MGy. The local separation of the electric charge due to the appearance of Coulomb forces leads to the radiation Coulomb hardening of glasses. The estimate of the Coulomb hardening of quartz glasses was ~ 1⋅107 Pa.

The theoretical results were experimentally confirmed by measuring the mechanical properties of glasses under high intensity proton irradiation as well as by testing the mechanical strength of a composite material based on quartz glass. Under proton irradiation with a dose rate of 5⋅103 Gy/s (energy of 8 MeV) up to threshold doses of ~ (1 – 5)⋅106 Gy in KU-1 quartz glasses, the decrement of acoustic vibrations decreased due to the Coulomb hardening. After gamma irradiation with 1.34⋅105 Gy, the tensile strength of a composite material based on quartz glass increased by up to 20 MPa. This value is in the range of estimates of the Coulomb hardening of quartz glasses. It is also shown that ionizing radiation does not affect the elastic modulus of materials based on SiO2.

References

  1. Arbuzov V.I. Fundamentals of Radiation Optical Material Science. Saint-Petersburg. Saint-Petersburg State University ITMO Publ., 2008, 284 p. (in Russian).
  2. Stepanov V.A., Baskov P.B., Chernov V.M., Fedorov V.D., Khorozova O.D., Kurdyavko P. V., Sakharov V. V., Stepanov P.A. Fluoride Glasses as Materials for Radiation Optics. Proc. of the XIIIth Int. Symposium on Non)Oxide Glasses and New Optical Glasses, September 9-13, 2002. Pardubice, Czech Republic, Part II, pp. 674-677.
  3. Stepanov V.A. Radiation-Induced Changes in Optical Properties of Glasses. Proc. of the VIIth Int. Conf. «Engineering Problems of Thermonuclear Reactors». St.-Petersburg, October 28-31. 2002, p. 195 (in Russian).
  4. Malinovsky V.K., Surovtsev N.V. Non-Homogeneity on the Nanometer Scale as a Universal Property of Glasses. Fizika i Khimiya Stekla. 2000, v. 26, no. 3, pp. 315-321 (in Russian).
  5. Malinovsky V.K., Noviokov V.N. The Nature of the Glass Transition and the Excess Low-Energy Density of Vibrational States in Glasses. J. Phys.: Condens. Matter.-1992, v. 4, pp. L139.
  6. Malinovsky V.K., Novikov V.N., Suvorovtsev N.V., Shebanin A.P. Study of Amorphous States of SiO2 by Method of Raman Scattering. Fizika Tvyordogo Tela. 2000, v. 42, iss. 1, pp. 62-68 (in Russian).
  7. Fabelinsky I.L. Molecular Light Scattering. Moscow. Vysshaya Shkola Publ., 1965, 512 p. (in Russian).
  8. Chernov V.M., Khorasanov G.L., Plaksin O.A., Stepanov V.A., Stepanov P.A., Belyakov V.A. Electrical and Optical Characteristics of Dielectrics for Fusion Use under Irradiation. Journal of Nuclear Materials. 1998, v.253, p. 175.
  9. Plaksin O.A., Chernov V.M., Stepanov P.A., Stepanov V.A. Radiation-Induced Electrical and Optical Processes in Materials Based on Al2 O3. Journal of Nuclear Materials. 1999, v.271-272, p. 496.
  10. Plaksin O.A., Stepanov V.A. Radiation-Induced Electrical and Optical Processes in Materials based on Al2 O3. Optika i Spektroskopiya. 2001, v. 90, no.4, pp.612-621 (in Russian).
  11. Demenkov P.V., Plaksin O.A., Stepanov V.A., Stepanov P.A., Chernov V.M. Luminescence Kinetics of Quartz Glass under Proton Irradiation. Pis’ma v Zhurnal Tekhnicheskoy Fiziki. 2000, v. 26, iss. 11, pp. 57-61 (in Russian).
  12. Nikanorov S.P., Kardashev B.K. Elasticity and Dislocation Inelasticity of Crystals. Moscow. Nauka Publ., 1985, 256 p. (in Russian).
  13. Kardashev B.K. Internal Friction and Physical and Mechanical Properties of Solids. Krystallografiya. 2009, v. 54, no. 6, pp. 1074-1086 (in Russian).
  14. Stepanov P.A., Atroshchenko I.G., Starodubtseva N.I., Shutkina O.V., Melnikov D.A. Development of High-Temperature Composite Materials of Heat Protective and Radio Engineering Purposes. Perspektivnye Materialy. 2014, no. 10, pp. 17-21 (in Russian).

quartz glass gamma irradiation optical properties acoustic measurement radiation hardening

Link for citing the article: Stepanov V.A., Demenkov P.V., Nikulina O.V. Radiation Hardening and Optical Properties of Materials based on SiO2. Izvestiya vuzov. Yadernaya Energetika. 2021, no. 1, pp. 143-153; DOI: https://doi.org/10.26583/npe.2021.1.13 (in Russian).

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