Sintering and characterization of mullite-Alumina composites

T. Sato; M. Ishizuka; M. Shimada

doi:10.1016/0272-8842(86)90018-0

Sintering and characterization of mullite-Alumina composites

T. Sato, M. Ishizuka, M. Shimada

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

The sintering behavior of mullite-alumina composites containing 68 to 90 wt% of Al₂O₃ synthesized by a sol-gel method was studied. Crystallization of mullite from amorphous starting materials occurred at above 1280°C. Solid solutions of mullite were formed over a range of compositions from 3Al₂O₃. 2SiO₂ to 2Al₂O₃. SiO₂ by heating at 1700°C. The time dependence of densification of the 3Al₂O₃. 2SiO₃ ceramic followed a semilogarithmic relation between relative density and sintering time during the first stage, then relative density decreased a little accompanied with the development of rod-like particles. Relative density, Vickers microhardness, fracture toughness and Young's modulus of the sintered mullite-alumina bodies were fairly low at the mullite composition (3Al₂O₃. 2SiO₂) but increased with increasing Al₂O₃ concentration.

Original language	English
Pages (from-to)	61-65
Number of pages	5
Journal	Ceramics International
Volume	12
Issue number	2
DOIs	https://doi.org/10.1016/0272-8842(86)90018-0
Publication status	Published - 1986

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/0272-8842(86)90018-0

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title = "Sintering and characterization of mullite-Alumina composites",

abstract = "The sintering behavior of mullite-alumina composites containing 68 to 90 wt% of Al2O3 synthesized by a sol-gel method was studied. Crystallization of mullite from amorphous starting materials occurred at above 1280°C. Solid solutions of mullite were formed over a range of compositions from 3Al2O3. 2SiO2 to 2Al2O3. SiO2 by heating at 1700°C. The time dependence of densification of the 3Al2O3. 2SiO3 ceramic followed a semilogarithmic relation between relative density and sintering time during the first stage, then relative density decreased a little accompanied with the development of rod-like particles. Relative density, Vickers microhardness, fracture toughness and Young's modulus of the sintered mullite-alumina bodies were fairly low at the mullite composition (3Al2O3. 2SiO2) but increased with increasing Al2O3 concentration.",

author = "T. Sato and M. Ishizuka and M. Shimada",

year = "1986",

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T1 - Sintering and characterization of mullite-Alumina composites

AU - Sato, T.

AU - Ishizuka, M.

AU - Shimada, M.

PY - 1986

Y1 - 1986

N2 - The sintering behavior of mullite-alumina composites containing 68 to 90 wt% of Al2O3 synthesized by a sol-gel method was studied. Crystallization of mullite from amorphous starting materials occurred at above 1280°C. Solid solutions of mullite were formed over a range of compositions from 3Al2O3. 2SiO2 to 2Al2O3. SiO2 by heating at 1700°C. The time dependence of densification of the 3Al2O3. 2SiO3 ceramic followed a semilogarithmic relation between relative density and sintering time during the first stage, then relative density decreased a little accompanied with the development of rod-like particles. Relative density, Vickers microhardness, fracture toughness and Young's modulus of the sintered mullite-alumina bodies were fairly low at the mullite composition (3Al2O3. 2SiO2) but increased with increasing Al2O3 concentration.

AB - The sintering behavior of mullite-alumina composites containing 68 to 90 wt% of Al2O3 synthesized by a sol-gel method was studied. Crystallization of mullite from amorphous starting materials occurred at above 1280°C. Solid solutions of mullite were formed over a range of compositions from 3Al2O3. 2SiO2 to 2Al2O3. SiO2 by heating at 1700°C. The time dependence of densification of the 3Al2O3. 2SiO3 ceramic followed a semilogarithmic relation between relative density and sintering time during the first stage, then relative density decreased a little accompanied with the development of rod-like particles. Relative density, Vickers microhardness, fracture toughness and Young's modulus of the sintered mullite-alumina bodies were fairly low at the mullite composition (3Al2O3. 2SiO2) but increased with increasing Al2O3 concentration.

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Sintering and characterization of mullite-Alumina composites

Abstract

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