Supersonically sprayed clay, silica, and silica aerogel hybrid films as thermal and electrical barriers

Tae Gun Kim, Chan Woo Park, Jong Gun Lee, Min Woo Kim, Mun Seok Choi, Woo Yeong Kim, Jae Sin Yang, Sam S. Yoon

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A thermal barrier coating (TBC) provides protection from thermal damage. While sufficiently thick coatings facilitate thermal protection, space limitations often require the use of high-performing barrier materials, such as clays, silica, and aerogels. Herein, we demonstrate the fabrication of thin TBCs of clay, silica, and silica aerogel microparticles deposited by supersonic cold spraying. The coated films were characterized by scanning electron microscopy and transmission electron microscopy. The effects of varied coating thicknesses from 1 to 5 mm on the TBC performance of each material were studied for both heating and cooling scenarios. We found that the hybrid clay–aerogel coating provided the best thermal insulation. Deposition by supersonic cold spraying is rapid and scalable, with potential applicability for the commercial production of TBCs.

Original languageEnglish
Pages (from-to)12934-12939
Number of pages6
JournalCeramics International
Volume44
Issue number11
DOIs
Publication statusPublished - 2018 Aug 1

Keywords

  • Aerogel
  • Clay
  • Cooling
  • Heating
  • SiO
  • Supersonic spray
  • Thermal barrier coating

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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