2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 8: Composite & Ceramic, Quasi-crystals and Nanomaterials
| Editors: | Kongoli F, Pech-Canul M, Kalemtas A, Werheit H |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 300 pages |
| ISBN: | 978-1-987820-31-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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High-Temperature Oxidation of Eutectic Alloy Nb-Si, Doped with Yttrium
Alena Upolovnikova1; Vladimir Chumarev2; Natalia Sel’menskikh3; Leopold Leontiev2;1INSTITUTE OF METALLURGY, Ekaterinburg, Russian Federation; 2INSTITUTE OF METALLURGY, URAL BRANCH OF THE RUSSIAN ACADEMY OF SCIENCES, Ekaterinburg, Russian Federation; 3INSTITUTE OF METALLURGY, URAL BRANCH OF THE RUSSIAN ACADEMY OF SCIENCE, Yekaterinburg, Russian Federation;
Type of Paper: Regular
Id Paper: 162
Topic: 8
Abstract:
<br />Nb-Si composites with a high melting point and low density are of interest as a candidate material for use in aircraft engines. However, one major limitation in the application of composites Nb-Si is their poor corrosion resistance at elevated temperatures. The corrosion resistance of Nb-Si composites can be improved by alloying elements such as yttrium. This paper studied the effect of yttrium on the oxidation of eutectic alloy Nb-Si at 25-1000o in air by thermogravimetric method, X-ray diffraction analysis and electron-probe microanalysis. The oxidation products are the oxides of silicon and niobium, which are fixed at a temperature above 600oC. The positive effects of yttrium on the corrosion resistance of Nb-Si eutectic alloy up to 700oC shown. The content in the samples of more than 3%Y increases the oxidation rate of alloys and reduces their heat resistance at heated in air.
Keywords:
Alloys; Corrosion; Rare-Earth; Resistance;References:
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