The mechanical and thermal properties of porous zirconia ceramics fabricated through a solid-state foaming method

Masaaki Hanao, Hidetaka Hayashi, Akira Kishimoto

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We have already fabricated ceramic mono-foams by expanding once-sintered dense shells utilizing the superplastic deformation of 3YSZ, 8YSZ, alumina and titania based ceramics. In the present study, granular coating method was applied to make a porous ceramics through the superplastically foaming method based on 3YSZ. Both mechanical strength and thermal conductivity were measured and compared with those of fully densified as well as conventional porous 3YSZ ceramics. Porous ceramics with porosity over 35% can be fabricated with less than 15 vol% of foam agent. The mechanical strength and thermal conductivity were superior or comparable to those for conventionally fabricated porous ceramics with the same porosity level.

Original languageEnglish
Pages (from-to)732-737
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume55
Issue number10
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Zirconia
Strength of materials
Foams
Thermal conductivity
Thermodynamic properties
Porosity
Superplastic deformation
Mechanical properties
Aluminum Oxide
Alumina
Titanium
Coatings
zirconium oxide
titanium dioxide

Keywords

  • Foam
  • Porous ceramics
  • Superplasticity
  • Zirconia

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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AB - We have already fabricated ceramic mono-foams by expanding once-sintered dense shells utilizing the superplastic deformation of 3YSZ, 8YSZ, alumina and titania based ceramics. In the present study, granular coating method was applied to make a porous ceramics through the superplastically foaming method based on 3YSZ. Both mechanical strength and thermal conductivity were measured and compared with those of fully densified as well as conventional porous 3YSZ ceramics. Porous ceramics with porosity over 35% can be fabricated with less than 15 vol% of foam agent. The mechanical strength and thermal conductivity were superior or comparable to those for conventionally fabricated porous ceramics with the same porosity level.

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