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Determination of Young's Modulus of Ceramics from Flexural Vibration at Elevated Temperatures

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Abstract:

In this paper we describe the construction of a laboratory-made resonant apparatus for the modulated force thermomechanical analysis (mf-TMA) and estimate the uncertainty of the measurement of Young's modulus of a porcelain sample. The porcelain sample was measured while increasing the temperature up to 1000 °C/5 °C/min. Thermodilatometry was performed to determine the actual dimensions of the sample in the same temperature regime. We assessed the influence of the repeatability of the directly measured values, the accuracy of the used measurers and different exceptions from the ideal experimental arrangement on the Young's modulus measurement uncertainties of types A and B. We found that the majority of the total uncertainty (80%) is determined at the room temperature. The remaining sources of uncertainty can be attributed to thermal expansion of the sample and inhomogeneity of the temperature field. The relative expanded uncertainty of the Young's modulus at the elevated temperatures was 1.1%.

Document Type: Research Article

DOI: http://dx.doi.org/10.3813/AAA.918380

Publication date: January 1, 2011

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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