Thermal expansion coefficient of a NiCoCrAlY-ZrO2(Y2O3) coating by a digital image processing based dilatometer

被引：5

作者：

Beghini, M ^{[1
]}

Bertini, L ^{[1
]}

Frendo, F ^{[1
]}

机构：

[1] Univ Pisa, Dipartimento Ingn Meccan Nucl & Prod, I-56126 Pisa, Italy

来源：

INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY | 2000年 / 15卷 / 1-2期

关键词：

ceramic coatings; thermal expansion coefficient; image processing;

D O I：

10.1504/IJMPT.2000.001237

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

A procedure for thermal expansion coefficient measurement is presented. A quartz dilatometer and a digital image processing technique were employed to obtain an accurate measure of the elongation of a prismatic specimen placed in a tubular furnace. By testing several symmetrically coated specimens the thermal expansion coefficient of a NiCoCrAlY-ZrO2(Y2O3) coating was obtained. The relationships for deducing the coefficient of the coating were derived by the multi-layer beam model and their sensitivity to experimental errors was discussed. Results were obtained in the range 20 degrees C-950 degrees C, both for the substrate and coating materials. An estimate of results accuracy is given, based on a Monte Carlo simulation of uncertainties.

引用

页码：78 / 90

页数：13

共 9 条

[1]

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[2]

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[3]

A METHOD FOR MEASURING TEMPERATURE-DEPENDENT STRESS AND THERMAL-EXPANSION OF COATINGS [J].