phmathВестник Государственного университета просвещения. Серия: Физика-МатематикаBulletin of Federal State University of Education. Series: Physics and Mathematics2949-50832949-5067Federal State University of Educationphmath-355Research ArticleФИЗИКАPHYSICSАППАРАТУРА ДЛЯ ИЗМЕРЕНИЯ МОДУЛЯ ЮНГА КЕРАМИКИ ПРИ ПОВЫШЕННЫХ ТЕМПЕРАТУРАХTHE APPARATUS FOR MEASUREMENT OF YOUNG’S MODULU OF CERAMICS AT ELEVATED TEMPERATURESГуланТомашHúlanTomášnoemail@neicon.ruТрникАнтонTrníkAntonnoemail@neicon.ruШтубняИгорьŠtubňaIgornoemail@neicon.ruУниверситет Константина ФилософаРоссияConstantine the Philosopher UniversityRussian Federation201420012023022129Copyright © Гулан Т., Трник А., Штубня И., 20232023Гулан Т., Трник А., Штубня И.Húlan T., Trník A., Štubňa I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.physmathmgou.ru/jour/article/view/355

В статье описана конструкция автоматизированной установки для динамического термомеханического анализа. Измерение основано на бесконтактном снимании микрофоном свободных изгибательных колебаний (цилиндрического или призматического) образца. Возбуждение колебаний проводится механическим импульсом от электромагнитного импульсора работающем в периодическом режиме с частотой 1 импульс в 15 или 30 с. Снимается зависимость амплитуды свободных колебаний образца от времени, которая переведётся с помощью трансформации Фурье на зависимость амплитуды колебаний от частоты, где определится резонансная частота и также коэффициент затухания по полуширине резонансного пика. Резонансная частота служит для расчёта модуля Юнга или скорости звука. Измерять эти величины могут в режиме линейного нагрева и охлаждения (скорость до 10 °C/мин) или в режиме изотермического нагрева. Максимальная рабочая температура установки 1200 °C. Расширенная относительная неопределённость при повышенных температурах 1,1 %.

The construction of a laboratory-made fully automated resonant apparatus for the modulated force thermomechanical analysis (mf-TMA) is described. The measurement is based on the impulse excitation technique (IET). The apparatus is able to provide the measurements of the resonant frequency, which is a base for determination of Young’s modulus, sound velocity and internal damping during heating up to 1200 °C. An expanded relative uncertainty of the Young’s modulus determination at elevated temperatures is 1.1 %.

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The authors declare that there are no conflicts of interest present.