SINTERING DENSIFICATION, MICROSTRUCTURE AND TRANSFORMATION BEHAVIOR OFAl2O3/ZrO2( Y2O3)COMPOSITES

Acta Metall Sin

2006, Vol. 42

Issue (4): 431-436 DOI:

Research Articles

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SINTERING DENSIFICATION, MICROSTRUCTURE AND TRANSFORMATION BEHAVIOR OFAl2O3/ZrO2( Y2O3)COMPOSITES

Ma W M

沈阳大学

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Ma W M. SINTERING DENSIFICATION, MICROSTRUCTURE AND TRANSFORMATION BEHAVIOR OFAl2O3/ZrO2( Y2O3)COMPOSITES. Acta Metall Sin, 2006, 42(4): 431-436 .

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Abstract In this paper, preparation of composites Al2O3/ZrO2(Y2O3) by vacuum sintering was studied. The effects of the contents of ZrO2(3Y) and ZrO2(2Y) on the sintering densification, microstructure and transformation behavior in detail were analyzed. The effect of the content of ZrO2(Y2O3) on the microstructure of the composites was also investigated, and it was found that there is a critical value of the content. The results also show that when the contents of ZrO2(Y2O3) were 15vol% and 20vol%, the relative densities of the composites Al2O3/ZrO2(Y2O3) were 99.6% and 98.5%, respectively, and the corresponding average grains of ZrO2(Y2O3) were 1.1μm and 1.8μm. In addition, the transformation quantities of the samples before and after their fracture were ＝43.8vol% and =18.4vol%.

Key words: composites Al2O3/ZrO2(Y2O3) vacuum sintering densification microstructure transformation behavio

Received: 08 July 2005

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TQ174.75

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2006/V42/I4/431

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