Optimization for Preparation of High Density Alumina Ceramics with Ultrafine-Grained Structure by a Fast Sintering Method

Wei Jiu Huang; Gui Sen Wu; Fan Cheng Meng; Feng Ye

doi:10.4028/www.scientific.net/AMR.624.103

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 624Optimization for Preparation of High Density...

Optimization for Preparation of High Density Alumina Ceramics with Ultrafine-Grained Structure by a Fast Sintering Method

Abstract:

The preparation of ultrafine-grained alumina ceramics by the fast sintering technique Self-propagating High-temperature Synthesis plus Quick Pressing (SHS-QP) method was reported. The reaction heat generated by combustion reaction was applied to act as a high temperature source. An alumina compact was loaded inside the combustion reactants, which form a “SHS-furnace”, and great mechanical pressure was applied when the temperature reached the maximum. Dense ultrafine-grained alumina ceramic was prepared using a lower heating rate (900 °C /min), and the effects of sintering time, and pressure on the densification and grain size were discussed. Within a short sintering time of 3 min, full-density alumina ceramics with ultrafine-grained structure are obtained under a pressure of 120 MPa.

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Periodical:

Advanced Materials Research (Volume 624)

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103-106

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.624.103

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Online since:

December 2012

Authors:

Wei Jiu Huang, Gui Sen Wu, Fan Cheng Meng, Feng Ye

Keywords:

Alumina, Heating Rate, Structure

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