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Fabrication of beta-Si3N4 whiskers from a GPSed-RBSN sponge using 6Y(2)O(3)-2MgO additives

Authors
Tuyen, Do-VanYoo, Jeong-HoKim, Hai-DooLee, Byong-Taek
Issue Date
Dec-2010
Publisher
Pergamon Press Ltd.
Keywords
Whisker; Silicon nitride; GPSed-RBSN
Citation
Ceramics International, v.36, no.8, pp 2427 - 2430
Pages
4
Journal Title
Ceramics International
Volume
36
Number
8
Start Page
2427
End Page
2430
URI
https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/17469
DOI
10.1016/j.ceramint.2010.07.011
ISSN
0272-8842
1873-3956
Abstract
In this study, beta-Si3N4 whiskers with a diameter of 0.05-1.5 mu m and length of about 70 mu m were successfully fabricated using a gas pressure sintered (GPSed)-reaction boned silicon nitride (RBSN) process at 1550 degrees C for 9 h. The beta-Si3N4 whiskers grew on the frame and filled fully in the pores of the GPSed-RBSN sponge. 6Y(2)O(3)-2MgO additives played a significant role in the growth of beta-Si3N4 whiskers and alpha-Si3N4 whiskers, while alpha-Si3N4 whiskers, which were grown inside the RBSN sponge through the vapor solid mechanism, had a diameter ranging from 50 to 100 nm and length of about 80 mu m. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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