PSI - Issue 25

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 25 (2020) 209–213

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers Abstract Instr mented indentation is used to s udy the surface mecha ical properties (hardness, elastic modulus, and creep) of pure epoxy lacquer and a l cquer modified with TiO 2 , SiO 2 , and ZnO. Chang s in the me ni al character stics of the coated and thermocycled materials are evaluated. The opes ar hown to aff ct the mechani al charact ristics manifesting themselves in the v ying values of th elastic modulus and hardness. Cyclic thermal action decrease the values of th elastic modu s and hardness of th pure epoxy lacq er and the lacquers do ed with SiO 2 and ZnO, but it has an ambiguous ef ect on these values for TiO 2 -doped lacquer. Obviously, it is mostly the polymer base that is responsible for the cr ep of the loaded coatings; therefore, the dopes have no significant effect on the behavior of the time dependence of creep, but they decrease its value. © 2020 The Authors. Published by Elsevier B.V. This is an ope acces article under C BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) 1st Virtual Conference on Structural Integrity - VCSI1 Effect of Modifying Dopes on the Mechanical Properties of Epoxy Coatings Affected by Thermocycling Sergey Smirnov a *, Dmitry Konovalov a , Irina Veretennikova a , Aleksander Pestov b , Evgenya Smirnova a a Institute of Engineering Science, 34 Komsomolskaya St., Ekaterinburg, 620049, Russia b I.Ya. Postovsky Institute of Organic Synthesis, 22 S.Kovalevskoy st., Ekaterinburg, 620049, Russia Abstract Instrumented indentation is used to study the surface mechanical properties (hardness, elastic modulus, and creep) of pure epoxy lacquer and a lacquer modified with TiO 2 , SiO 2 , and ZnO. Changes in the mechanical characteristics of the coated and thermocycled materials are evaluated. The dopes are shown to affect the mechanical characteristics manifesting themselves in the varying values of the elastic modulus and hardness. Cyclic thermal action decreases the values of the elastic modulus and hardness of the pure epoxy lacquer and the lacquers doped with SiO 2 and ZnO, but it has an ambiguous effect on these values for the TiO 2 -doped lacquer. Obviously, it is mostly the polymer base that is responsible for the creep of the loaded coatings; therefore, the dopes have no significant effect on the behavior of the time dependence of creep, but they decrease its value. 1st Virtual Conference on Structural Integrity - VCSI1 Effect of Modifying Dopes on the Mechanical Properties of Epoxy Coatings Affected by Thermocycling Sergey Smirnov a *, Dmitry Konovalov a , Irina Veretennikova a , Aleksander Pestov b , Evgenya Smirnova a a Institute of Engin ering Science, 34 Komsomolskaya St., Ekaterinburg, 620049, Russia b I.Ya. Postovsky Institute of Organic Synthesis, 22 S.Kovalevskoy st., Ekaterinburg, 620049, Russia

Peer-review under responsibility of the VCSI1 organizers

Keywords: epoxy lacquer; modifiers; oxides; creep; microindentation; thermocycling Keywords: epoxy lacquer; modifiers; oxides; creep; microindentation; thermocycling

1. Introduction Epoxy materials are fairly often used as coatings. However, they are seldom used pure; various modifiers are most 1. Introduction Epoxy materials are fairly often used as coatings. However, they are seldom used pure; various modifiers are most

* Corresponding author. Tel.: +7-343-3744725. E-mail address: svs@imach.uran.ru. * Corresponding author. Tel.: +7-343-3744725. E-mail address: svs@imach.uran.ru.

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers 2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an ope access article under t C BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers 10.1016/j.prostr.2020.04.025