Fabrication of high-performance Y2O3 stabilized hafnium dioxide refractories

Yubai Zhang

doi:10.1016/j.ceramint.2015.01.047

Fabrication of high-performance Y2O3 stabilized hafnium dioxide refractories

Yubai Zhang

Research output: Contribution to journal › Review article › peer-review

34 Citations (Scopus)

Abstract

Y2O3 stabilized HfO2 ceramics with 5 mol% and 8 mol% Y2O3, respectively, were successfully fabricated by pressureless sintering at 1600 °C for 1 h. The phase distribution and transformation, microstructure, and relative density were investigated for Y2O3 stabilized HfO2 ceramics. Cubic phase was observed in the Y2O3 stabilized hafnium dioxide while pure HfO2 showed monoclinical phase only. The SEM images of fractured surface indicated two kinds of structures existed in modified HfO2, the solid solution region and uniform polygon grains, and some holes caused by Kirkendall effect. Refractoriness test showed that high temperature volumetric stability of the material can be effectively enhanced by adding Y2O3 into HfO2. © 2015 Elsevier Ltd and Techna Group S.r.l.

Original language	English
Journal	Ceramics International
DOIs	https://doi.org/10.1016/j.ceramint.2015.01.047
Publication status	Published - 1 May 2015
Externally published	Yes

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10.1016/j.ceramint.2015.01.047

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@article{b18af4b549234fd4af09d346b99c42ed,

title = "Fabrication of high-performance Y2O3 stabilized hafnium dioxide refractories",

abstract = "Y2O3 stabilized HfO2 ceramics with 5 mol\% and 8 mol\% Y2O3, respectively, were successfully fabricated by pressureless sintering at 1600 °C for 1 h. The phase distribution and transformation, microstructure, and relative density were investigated for Y2O3 stabilized HfO2 ceramics. Cubic phase was observed in the Y2O3 stabilized hafnium dioxide while pure HfO2 showed monoclinical phase only. The SEM images of fractured surface indicated two kinds of structures existed in modified HfO2, the solid solution region and uniform polygon grains, and some holes caused by Kirkendall effect. Refractoriness test showed that high temperature volumetric stability of the material can be effectively enhanced by adding Y2O3 into HfO2. {\textcopyright} 2015 Elsevier Ltd and Techna Group S.r.l. ",

author = "Yubai Zhang",

year = "2015",

month = may,

day = "1",

doi = "10.1016/j.ceramint.2015.01.047",

language = "English",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier",

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TY - JOUR

T1 - Fabrication of high-performance Y2O3 stabilized hafnium dioxide refractories

AU - Zhang, Yubai

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Y2O3 stabilized HfO2 ceramics with 5 mol% and 8 mol% Y2O3, respectively, were successfully fabricated by pressureless sintering at 1600 °C for 1 h. The phase distribution and transformation, microstructure, and relative density were investigated for Y2O3 stabilized HfO2 ceramics. Cubic phase was observed in the Y2O3 stabilized hafnium dioxide while pure HfO2 showed monoclinical phase only. The SEM images of fractured surface indicated two kinds of structures existed in modified HfO2, the solid solution region and uniform polygon grains, and some holes caused by Kirkendall effect. Refractoriness test showed that high temperature volumetric stability of the material can be effectively enhanced by adding Y2O3 into HfO2. © 2015 Elsevier Ltd and Techna Group S.r.l.

AB - Y2O3 stabilized HfO2 ceramics with 5 mol% and 8 mol% Y2O3, respectively, were successfully fabricated by pressureless sintering at 1600 °C for 1 h. The phase distribution and transformation, microstructure, and relative density were investigated for Y2O3 stabilized HfO2 ceramics. Cubic phase was observed in the Y2O3 stabilized hafnium dioxide while pure HfO2 showed monoclinical phase only. The SEM images of fractured surface indicated two kinds of structures existed in modified HfO2, the solid solution region and uniform polygon grains, and some holes caused by Kirkendall effect. Refractoriness test showed that high temperature volumetric stability of the material can be effectively enhanced by adding Y2O3 into HfO2. © 2015 Elsevier Ltd and Techna Group S.r.l.

U2 - 10.1016/j.ceramint.2015.01.047

DO - 10.1016/j.ceramint.2015.01.047

M3 - Review article

SN - 0272-8842

JO - Ceramics International

JF - Ceramics International

ER -

Fabrication of high-performance Y2O3 stabilized hafnium dioxide refractories

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