Reaction sintering and microstructural development in the system Al2O3-AlN

Y W Kim, H C Park, Y B Lee, K D Oh, R Stevens

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The reaction sintering and microstructural development of alumina with additions of 1-25 mol% AlN have been investigated by heating under 1-atm nitrogen gas at 1600-1800 degreesC. Sintering Al2O3 with 1 mol% AlN addition at 1750 degreesC, resulted in a ceramic with close to theoretical density of alpha -Al2O3 (3.98 g/cm(3)). For the different compositions, the sintered densities decreased with increasing AlN content. This trend was attributed to the presence of secondary phases such as AlON(9Al(2)O(3).5AlN) and phi (5Al(2)O(3).AlN) formed by reacting Al2O3 with AlN. For a given AIN addition, densification increased with sintering temperature, due to Al2O3 and/or AlON grain growth control. The stability of the individual crystalline phases depends on both sintering temperature and batch composition. (C) 2001 Published by Elsevier Science Ltd.
Original languageEnglish
Pages (from-to)2383-2391
Number of pages9
JournalJournal of the European Ceramic Society
Volume21
Issue number13
Publication statusPublished - 2001

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Sintering
Aluminum Oxide
Chemical analysis
Grain growth
Densification
Nitrogen
Alumina
Gases
Crystalline materials
Heating
Temperature

Cite this

Kim, Y. W., Park, H. C., Lee, Y. B., Oh, K. D., & Stevens, R. (2001). Reaction sintering and microstructural development in the system Al2O3-AlN. Journal of the European Ceramic Society, 21(13), 2383-2391.

Reaction sintering and microstructural development in the system Al2O3-AlN. / Kim, Y W; Park, H C; Lee, Y B; Oh, K D; Stevens, R.

In: Journal of the European Ceramic Society, Vol. 21, No. 13, 2001, p. 2383-2391.

Research output: Contribution to journalArticle

Kim, YW, Park, HC, Lee, YB, Oh, KD & Stevens, R 2001, 'Reaction sintering and microstructural development in the system Al2O3-AlN', Journal of the European Ceramic Society, vol. 21, no. 13, pp. 2383-2391.
Kim, Y W ; Park, H C ; Lee, Y B ; Oh, K D ; Stevens, R. / Reaction sintering and microstructural development in the system Al2O3-AlN. In: Journal of the European Ceramic Society. 2001 ; Vol. 21, No. 13. pp. 2383-2391.
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AB - The reaction sintering and microstructural development of alumina with additions of 1-25 mol% AlN have been investigated by heating under 1-atm nitrogen gas at 1600-1800 degreesC. Sintering Al2O3 with 1 mol% AlN addition at 1750 degreesC, resulted in a ceramic with close to theoretical density of alpha -Al2O3 (3.98 g/cm(3)). For the different compositions, the sintered densities decreased with increasing AlN content. This trend was attributed to the presence of secondary phases such as AlON(9Al(2)O(3).5AlN) and phi (5Al(2)O(3).AlN) formed by reacting Al2O3 with AlN. For a given AIN addition, densification increased with sintering temperature, due to Al2O3 and/or AlON grain growth control. The stability of the individual crystalline phases depends on both sintering temperature and batch composition. (C) 2001 Published by Elsevier Science Ltd.

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