Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys

The cyclic oxidation response of Mo-14Hf-23B and Mo-14.8Zr-26B (compositions in at. %) was investigated in air at 800 °C, which is a critical temperature for Mo-based alloys because of the pesting phenomenon. Rapid oxidation was observed for the unprotected samples, and an oxidation protection coati...

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Autores principales: Smokovych, Iryna, Bolbut, Volodymyr, Krüger, Manja, Scheffler, Michael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6679109/
https://www.ncbi.nlm.nih.gov/pubmed/31295821
http://dx.doi.org/10.3390/ma12142215
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author Smokovych, Iryna
Bolbut, Volodymyr
Krüger, Manja
Scheffler, Michael
author_facet Smokovych, Iryna
Bolbut, Volodymyr
Krüger, Manja
Scheffler, Michael
author_sort Smokovych, Iryna
collection PubMed
description The cyclic oxidation response of Mo-14Hf-23B and Mo-14.8Zr-26B (compositions in at. %) was investigated in air at 800 °C, which is a critical temperature for Mo-based alloys because of the pesting phenomenon. Rapid oxidation was observed for the unprotected samples, and an oxidation protection coating was developed based on a preceramic polymer with silicon and boron as particulate fillers. Cyclic oxidation tests of the coated samples showed excellent oxidation protection: no Mo, Hf or Zr oxides were found after testing and a small mass gain in the initial stage of oxidation indicated the formation of a glassy protection layer on the alloys surfaces after exposure to air at 800 °C.
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spelling pubmed-66791092019-08-19 Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys Smokovych, Iryna Bolbut, Volodymyr Krüger, Manja Scheffler, Michael Materials (Basel) Article The cyclic oxidation response of Mo-14Hf-23B and Mo-14.8Zr-26B (compositions in at. %) was investigated in air at 800 °C, which is a critical temperature for Mo-based alloys because of the pesting phenomenon. Rapid oxidation was observed for the unprotected samples, and an oxidation protection coating was developed based on a preceramic polymer with silicon and boron as particulate fillers. Cyclic oxidation tests of the coated samples showed excellent oxidation protection: no Mo, Hf or Zr oxides were found after testing and a small mass gain in the initial stage of oxidation indicated the formation of a glassy protection layer on the alloys surfaces after exposure to air at 800 °C. MDPI 2019-07-10 /pmc/articles/PMC6679109/ /pubmed/31295821 http://dx.doi.org/10.3390/ma12142215 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Smokovych, Iryna
Bolbut, Volodymyr
Krüger, Manja
Scheffler, Michael
Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys
title Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys
title_full Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys
title_fullStr Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys
title_full_unstemmed Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys
title_short Tailored Oxidation Barrier Coatings for Mo-Hf-B and Mo-Zr-B Alloys
title_sort tailored oxidation barrier coatings for mo-hf-b and mo-zr-b alloys
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6679109/
https://www.ncbi.nlm.nih.gov/pubmed/31295821
http://dx.doi.org/10.3390/ma12142215
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AT krugermanja tailoredoxidationbarriercoatingsformohfbandmozrballoys
AT schefflermichael tailoredoxidationbarriercoatingsformohfbandmozrballoys

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