Itacolumite like high damping ceramics in the system Al 2 O 3 -TiO 2 -MgO

T. Shimazu, M. Miura, N. Isu, T. Ogawa, A. Ichikawa, Hideki Ishida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Ceramics is rigid and brittle originally. If the weakness could be overcome, the application will be widely expanded. Itacolumite known as high flexibility rock is the group of sand stone which consist of quartz and slight amount of muscovite. The microstructure of itacolumite has a lot of narrow gaps between the grains, the gap was thought to be formed by the dissolution of minerals in between quartz grains into the groundwater. This narrow space enables a little displacement of the particles, and the rock can bend with stress like plastic deformation. These characters of itacolumite showed the new ceramic functions such as stress relaxation properties and high damping capacity (internal friction Q -1 =0.03). The authors tried to develop high damping ceramics by the mimic of itacolumite, and found the Al 2 O 3 -TiO 2 -MgO ceramics. The ceramics had stress relaxation properties and high damping capacity (Q -1 =0.01) since microcracks were formed during sintering by the discontinuous grain growth and the anisotropic thermal expansion in the cooling process.

Original languageEnglish
Title of host publicationWATER DYNAMICS
Subtitle of host publication3rd International Workshop on Water Dynamics
Pages69-71
Number of pages3
DOIs
Publication statusPublished - 2006 May 15
EventWATER DYANMICS: 3rd International Workshop on Water Dynamics - Sendai, Japan
Duration: 2005 Nov 162005 Nov 17

Publication series

NameAIP Conference Proceedings
Volume833
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherWATER DYANMICS: 3rd International Workshop on Water Dynamics
CountryJapan
CitySendai
Period05/11/1605/11/17

Keywords

  • Al TiO
  • Distontinuous grain growth
  • Flexibility
  • Itacolumite
  • MgTi O
  • Microcrack
  • Porous Ceramics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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