Oxyacetylene torch testing and microstructural characterization of tantalum carbide

Summary Tantalum carbide samples have been subjected to high‐temperature testing at ∼2300°C using an oxyacetylene torch to evaluate their potential for ultra‐high temperature applications. While large samples cracked during the rapid heating, indicating their inability to withstand thermal shock, sm...

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Bibliographic Details
Published inJournal of microscopy (Oxford) Vol. 250; no. 2; pp. 122 - 129
Main Authors PAUL, A., BINNER, J.G.P., VAIDHYANATHAN, B., HEATON, A.C.J., BROWN, P.M.
Format Journal Article
LanguageEnglish
Published England Wiley Subscription Services, Inc 01.05.2013
Subjects
Heating
Melting
Microscopy
Microstructure
Oxyacetylene
Phases
Tantalum carbide
Tantalum oxides
ultra‐high temperature
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Summary:Summary Tantalum carbide samples have been subjected to high‐temperature testing at ∼2300°C using an oxyacetylene torch to evaluate their potential for ultra‐high temperature applications. While large samples cracked during the rapid heating, indicating their inability to withstand thermal shock, small samples survived the severe test conditions. The oxidation products formed were characterized and found to comprise different phases of Ta2O5. The ultra‐high temperature experienced by the samples resulted in the formation of many interesting microstructures, including the formation of submicron sized grains, which has not been reported previously in the literature, as well as the expected evidence of melting.
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ISSN:0022-2720
1365-2818
DOI:10.1111/jmi.12028