Thermal Shock Resistance of the RE-Oxide and Oxynitride Glasses

Abstract:

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Thermal shock resistance of the RE-Si-Mg-O-N glasses (RE = La, Nd, Yb, Lu) with 0 and 20 eq.% of nitrogen was investigated by the indentation-quench method based on propagation of Vickers cracks. Crack growth was measured on the same sample for a test series of different quenching temperatures. Thermal shock resistance of the studied materials was determined as a temperature difference resulting in 10 % growth of the initial cracks (∆T10) and by the thermal shock parameter R calculated from the material properties. Although the comparison of ∆T10 and R values as a function of glass composition revealed some differences between these two approaches, also a common trend was observed. Thermal shock resistance increased with the fractional glass compactness resulting from RE type and N content increase.

Info:

Periodical:

Edited by:

J. Dusza, R. Danzer and R. Morrell

Pages:

296-299

DOI:

10.4028/www.scientific.net/KEM.290.296

Citation:

F. Lofaj and F. Dorčáková, "Thermal Shock Resistance of the RE-Oxide and Oxynitride Glasses", Key Engineering Materials, Vol. 290, pp. 296-299, 2005

Online since:

July 2005

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$35.00

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