A New Device for Measuring Hot Thermal Shock, Thermal Cycling and Other High Temperature Properties of Refractories

Jens Baber, Gerhard Seifert, Friedrich Raether

Fraunhofer Center for High Temperature Materials and Design (HTL), Bayreuth/Germany

Revision

Volume 10, Issue 1, Pages 77 - 80

Abstract

The exact knowledge of the material properties of refractories in the region of their, usual very high, application temperatures is the key to their successful application as well as to the development of new refractory materials. A particularly important question is the behaviour of a refractory against thermal shock and thermal cycling. While many techniques and standards deal with changes between high temperature and room temperature, the more realistic load is often the fast change between two high temperatures. In this work, we explain the capabilities of a new ThermoOptical measuring device called TOM_wave, which was developed for hot thermal shock and thermal cycling tests and determination of further high temperature properties of refractories.

Keywords

thermal shock tests, refractory service life, thermo-optical measuring devices

References

[1] Normenausschuss Materialprüfung. Method of test for dense shaped refractory products: Determination of resistance to thermal shock. DIN EN 993 Part 11, Berlin 2008 [2] Hasselman, D.P.H.: Unifed theory of thermal shock fracture initiation and crack propagation in brittle ceramics. J. Amer. Ceram. Soc. 52 (1969) 600–604 [3] Schneider, A.G.; Petzow, G.: Thermal shock testing of ceramics – a new testing method. J. Amer. Ceram. Soc. 74 (1991) 98–102 [4] Awaji, H.; Honda, S.; Nishikawa, T.: Thermal shock parameters of ceramics evaluated by infrared radiation heating. JSME Int. J. Series A 40 (1997) 414–422 [5] Pulz, R.: Laserthermoschockversuche – Durchführung und Auswertung für unterschiedliche Hochleistungkeramiken. Dissertation, TU- shock fracture initiation and crack propaga- Hamburg-Harburg (2014) [6] Raether, F.: Springer, R.; Beyer, S.: Optical dilatometry for the control of microstructure development during sintering. Mater. Res. In- novations 4 (2001) 245–250 [7] Raether, F.: Current state of in situ measuring methods for the control of fring processes. J. Amer. Ceram. Soc. 92 (2009) S146–S152 [8] www.htl-enertherm.eu

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