Effect of coating thickness on interfacial shear behavior of zirconia-coated sapphire fibers in a polycrystalline alumina matrix

John R. Hellmann, Yeong Shyung Chou

Research output: Contribution to journalConference article

2 Scopus citations


The effect of zirconia (ZrO2) interfacial coatings on the interfacial shear behavior in sapphire reinforced alumina has been examined via loaded sol dipping technique and then hot pressing. Interfacial shear strength and sliding behavior of the coated fibers are also examined via thin-slice indentation fiber pushout and pushback techniques. The high interfacial shear strengths and sliding stresses measured, as well as the potentially strength degrading surface reconstruction observed on the coated fibers after hot pressing and heat treatment, indicate that dense zirconia coatings are not suitable candidates for optimizing composite toughness and strength in the sapphire fiber reinforced alumina system.

Original languageEnglish (US)
Pages (from-to)411-420
Number of pages10
JournalMaterials Research Society Symposium - Proceedings
StatePublished - Jan 1 1995
EventProceedings of the 1994 Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Dec 2 1994


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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