Preparation of Al2O3-ZrO2-SiO2 ceramic composites by high-gravity combustion synthesis

Guanghua Liu; Quansheng Wang; Jiangtao Li; Yixiang Chen; Bin He

doi:10.1016/j.ijrmhm.2013.04.015

Preparation of Al₂O₃-ZrO₂-SiO₂ ceramic composites by high-gravity combustion synthesis

Guanghua Liu^*, Quansheng Wang, Jiangtao Li, Yixiang Chen, Bin He

^*Corresponding author for this work

School of Material Science and Engineering

CAS - Technical Institute of Physics and Chemistry

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

11 Citations (Scopus)

Abstract

By a furnace-free technique of high-gravity combustion synthesis, Al ₂O₃-ZrO₂-SiO₂ ceramic composites were prepared via melt solidification instead of conventional powder sintering. The solidification kinetics and microstructure evolution of the ceramic composites in high-gravity combustion synthesis were discussed. The phase assemblage of the ceramic composites depended on the chemical composition, where both (Al₂O₃ + ZrO₂) and (mullite + ZrO ₂) composites were obtained. The ceramic composites consisted of ultrafine eutectics and sometimes also large primary crystals. In the (mullite + ZrO₂) composites, two different morphologies and orientations were observed for the primary mullite crystals, and the volume fraction of mullite increased with increasing SiO₂ content. The ceramic composites exhibited a hardness of 11.2-14.8 GPa, depending on the chemical composition and phase assemblage.

Original language	English
Pages (from-to)	622-626
Number of pages	5
Journal	International Journal of Refractory Metals and Hard Materials
Volume	41
DOIs	https://doi.org/10.1016/j.ijrmhm.2013.04.015
Publication status	Published - Nov 2013

Keywords

Ceramics
Composites
Hardness
High-gravity combustion synthesis

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10.1016/j.ijrmhm.2013.04.015

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title = "Preparation of Al2O3-ZrO2-SiO2 ceramic composites by high-gravity combustion synthesis",

abstract = "By a furnace-free technique of high-gravity combustion synthesis, Al 2O3-ZrO2-SiO2 ceramic composites were prepared via melt solidification instead of conventional powder sintering. The solidification kinetics and microstructure evolution of the ceramic composites in high-gravity combustion synthesis were discussed. The phase assemblage of the ceramic composites depended on the chemical composition, where both (Al2O3 + ZrO2) and (mullite + ZrO 2) composites were obtained. The ceramic composites consisted of ultrafine eutectics and sometimes also large primary crystals. In the (mullite + ZrO2) composites, two different morphologies and orientations were observed for the primary mullite crystals, and the volume fraction of mullite increased with increasing SiO2 content. The ceramic composites exhibited a hardness of 11.2-14.8 GPa, depending on the chemical composition and phase assemblage.",

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AU - Liu, Guanghua

AU - Wang, Quansheng

AU - Li, Jiangtao

AU - Chen, Yixiang

AU - He, Bin

PY - 2013/11

Y1 - 2013/11

N2 - By a furnace-free technique of high-gravity combustion synthesis, Al 2O3-ZrO2-SiO2 ceramic composites were prepared via melt solidification instead of conventional powder sintering. The solidification kinetics and microstructure evolution of the ceramic composites in high-gravity combustion synthesis were discussed. The phase assemblage of the ceramic composites depended on the chemical composition, where both (Al2O3 + ZrO2) and (mullite + ZrO 2) composites were obtained. The ceramic composites consisted of ultrafine eutectics and sometimes also large primary crystals. In the (mullite + ZrO2) composites, two different morphologies and orientations were observed for the primary mullite crystals, and the volume fraction of mullite increased with increasing SiO2 content. The ceramic composites exhibited a hardness of 11.2-14.8 GPa, depending on the chemical composition and phase assemblage.

AB - By a furnace-free technique of high-gravity combustion synthesis, Al 2O3-ZrO2-SiO2 ceramic composites were prepared via melt solidification instead of conventional powder sintering. The solidification kinetics and microstructure evolution of the ceramic composites in high-gravity combustion synthesis were discussed. The phase assemblage of the ceramic composites depended on the chemical composition, where both (Al2O3 + ZrO2) and (mullite + ZrO 2) composites were obtained. The ceramic composites consisted of ultrafine eutectics and sometimes also large primary crystals. In the (mullite + ZrO2) composites, two different morphologies and orientations were observed for the primary mullite crystals, and the volume fraction of mullite increased with increasing SiO2 content. The ceramic composites exhibited a hardness of 11.2-14.8 GPa, depending on the chemical composition and phase assemblage.

KW - Ceramics

KW - Composites

KW - Hardness

KW - High-gravity combustion synthesis

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JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

ER -

Preparation of Al₂O₃-ZrO₂-SiO₂ ceramic composites by high-gravity combustion synthesis

Abstract

Keywords

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