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 Citations (Scopus)

Abstract

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
Volume365
StatePublished - Jan 1 1995
EventProceedings of the 1994 Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Dec 2 1994

Fingerprint

Aluminum Oxide
zirconium oxides
Sapphire
Zirconia
sapphire
Alumina
hot pressing
aluminum oxides
shear strength
shear
fiber pushout
coatings
Coatings
fibers
sliding
Fibers
Hot pressing
matrices
Shear strength
toughness

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "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.",
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AU - Chou, Yeong Shyung

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N2 - 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.

AB - 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.

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SP - 411

EP - 420

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

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