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Temperature evolution of plasma-sprayed niobium particles impacting on a substrate

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/0257-8972(91)90160-X
AuthorSearch for: 1; Search for: 1; Search for: 1; Search for: 1; Search for: ; Search for:
Affiliation
  1. National Research Council of Canada
FormatText, Article
ConferenceNTSC '90 - National Thermal Spray Conference, May 20-25, 1990, Long Beach, CA
Abstract
A fast two-color pyrometer is used to monitor the temperature evolution of individual plasma- sprayed niobium particles after their impact on a substrate. The experimental setup permits rejection of thermal events corresponding to in-flight particles intersecting the pyrometer field of view, ensuring that only particles impacting on the substrate surface are examined. Cooling rates as high as 10⁸Ks⁻¹ are measured when particles are sprayed on steel and alumina substrates. An interruption of the rapid cooling process and a transient temperature increase are observed near the niobium melting point. Experimental results are interpreted with the help of a numerical thermal flow model taking into account undercooling and the recalescence effects.
Publication date
PublisherElsevier
In
  • Surface and Coatings Technology 46, no. 2: 173–187.
LanguageEnglish
Peer reviewedYes
NRC numberCNRC 30729
NRC-IGM89TC-302-913-G
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Record identifier4d6abc13-6b84-4fc7-9457-fa8ca7105fc4
Record created2020-02-15
Record modified2020-03-17
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