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Title: Tailored oxidation barrier coatings for Mo-Hf-B and Mo-Zr-B alloys
Author(s): Smokovych, Iryna
Bolbut, Volodymyr
Krüger, ManjaLook up in the Integrated Authority File of the German National Library
Scheffler, Michael
Issue Date: 2019
Type: Article
Language: English
URN: urn:nbn:de:gbv:ma9:1-1981185920-367821
Subjects: Polymer-derived ceramics
Preceramic polymers
Oxidation barrier coatings
Abstract: he 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.
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: DFG-Publikationsfonds 2019
Journal Title: Materials
Publisher: MDPI
Publisher Place: Basel
Volume: 12
Issue: 14
Original Publication: 10.3390/ma12142215
Page Start: 1
Page End: 13
Appears in Collections:Fakultät für Maschinenbau (OA)

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