NDLI: Effect of Y$_{2}$O$_{3}$ Addition on Oxidation Behavior of W-Cr Alloys

Content Provider	Springer Nature Link
Author	Telu, Suresh Mitra, Rahul Pabi, Shyamal Kumar
Copyright Year	2015
Abstract	A study has been carried out on non-isothermal and cyclic oxidation behavior of the W$_{1−x }$Cr$_{ x }$–3 wt pct Y$_{2}$O$_{3}$ (x = 0.3 or 0.5) composite samples, and the results have been compared with those of binary W-Cr alloys. The microstructures of the sintered samples showed the presence of W-rich (β$_{1}$) + Cr-rich (β$_{2}$) regions and more or less uniformly distributed Y$_{2}$O$_{3}$ particles. Protection against high-temperature oxidation is possible due to the formation of a stable mixed oxide scale containing both Cr$_{2}$WO$_{6}$ and Y$_{2}$W$_{3}$O$_{12}$ at the oxide–air interface. Melting of the eutectic composition of Y$_{2}$W$_{3}$O$_{12}$ and WO$_{3}$ leads to the formation of a liquid phase, which helps in closure of pores by sintering and viscoplastic flow of the oxide scale, thereby enhancing its resistance to spallation and further oxidation.
Starting Page	5909
Ending Page	5919
Page Count	11
File Format	PDF
ISSN	10735623
Journal	Metallurgical and Materials Transactions A
Volume Number	46
Issue Number	12
e-ISSN	15431940
Language	English
Publisher	Springer US
Publisher Date	2015-10-05
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Condensed Matter Physics

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