NDLI: Sintering mechanisms in aluminum nitride with Y or Ca-containing additive

Content Provider	Springer Nature Link
Author	Molisani, A. L. Yoshimura, H. N. Goldenstein, H.
Copyright Year	2008
Abstract	AlN with 4 wt.% Y$_{2}$O$_{3}$ or CaO were prepared by sintering in dilatometer and conventional furnace up to 1850 °C. The aim of this work was to compare the sintering behavior and mechanisms related with the densification of AlN with Y or Ca-containing additives. The sample with Y$_{2}$O$_{3}$ approached 33% of total densification by solid-state sintering process preceding the liquid phase formation, which was near 1700 °C. After the formation of liquid an overheating of only 50 °C was needed for this sample to achieve full density. The sample with CaO formed liquid-phase near 1400 °C, but required a higher overheating (>300 °C) in order to achieve full density. The densification of the sample with CaO was retarded by: (i) high viscosity of the liquid-phase formed below 1600 °C; (ii) formation of large pores; and (iii) gas entrapped inside the pores.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	20
Issue Number	1
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2008-05-21
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Characterization and Evaluation of Materials Optical and Electronic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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