Itacolumite like High Damping Ceramics in the System Al2O3-TiO2-MgO

Journal Article · Mon May 15 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2207076· OSTI ID:20798653

Shimazu, T ^[1]; Miura, M; Isu, N ^[2]; Ogawa, T ^[3]; Ichikawa, A ^[4]; Ishida, E H ^[1]

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1. Graduate School of Environmental Studies Tohoku University, Sendai, Miyagi, 980-8579 (Japan)
2. General Research Institute of Technology, INAX Corp., Minatomachi, Tokoname, Aichi, 479-8588 (Japan)
3. Acoh Ceramic Corporation, Oroshicho, Toki, Gifu, 509-5202 (Japan)
4. Sanwa Yuka Kogyo Corporation, Ichiriyamacho, Kariya, Aichi, 448-0002 (Japan)

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 Al2O3-TiO2-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.

• OSTI ID: 20798653
• Journal Information: AIP Conference Proceedings, Vol. 833, Issue 1; Conference: 3. international workshop on water dynamics, Sendai (Japan), 16-17 Nov 2005; Other Information: DOI: 10.1063/1.2207076; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
ANISOTROPY
CAPACITY
CERAMICS
COOLING
CRACKS
DAMPING
FLEXIBILITY
GRAIN GROWTH
GROUND WATER
INTERNAL FRICTION
MAGNESIUM OXIDES
MICROSTRUCTURE
MUSCOVITE
PARTICLES
PLASTICITY
QUARTZ
SINTERING
STRESS RELAXATION
STRESSES
THERMAL EXPANSION
TITANIUM COMPOUNDS