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Effect of M-ZrO2 on Sintering Behavior and Thermal Shock Resistance of Dense Cr2O3 Material

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Abstract:

The samples were prepared using Cr2O3 micropowder, TiO2 micropowder and m-ZrO2 micropowder as main starting material, polyvinyl alcohol as binder, by a series of processes such as pulping, spraying granulation, machine moulding and cold isostatic pressing, and sintering at 1 500°С for 3 h in nitrogen protected atmosphere furnace (oxygen partial pressure was 10 Pa). Then thermal shock resistance of the samples was tested by wind quenching. Effect of m-ZrO2 (2%-5% in mass) on sintering behavior and thermal shock resistance of Cr2O3 material was investigated. The results show that m-ZrO2 can accelerate the sintering of Cr2O3 material, but excess 2 wt% m-ZrO2 doesn’t work; m-ZrO2 can obviously improve thermal shock resistance of Cr2O3 material, sample containing 3 wt% m-ZrO2 has 34 wind quenching cycles from 1 150°С to room temperature, and sample without m-ZrO2 only has 11 cycles.

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Periodical:

Advanced Materials Research (Volumes 199-200)

Pages:

1928-1931

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.199-200.1928

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Online since:

February 2011

Authors:

Hong Ji Yin, Tao Zhang, Ai Jun Wu, Jin Xiang Wang

Keywords:

Chromic Oxide, m-ZrO2, Sintering, Thermal Shock Resistance

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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