Journal
SCRIPTA MATERIALIA
Volume 66, Issue 1, Pages 33-36Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.09.037
Keywords
Si3N4; BN; B4C; Mechanical properties; Dielectric properties
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The mechanical properties of porous Si3N4 ceramic are noticeably improved after chemical vapor deposition (CVD) of Si3N4, BN and B4C coatings. The dielectric constant and loss of porous Si3N4 ceramic remain almost unchanged after CVD of BN, increase slightly after CVD of Si3N4, but increase greatly after CVD of B4C. Overall, CVD of Si3N4 performs better than CVD of BN and B4C in improving the mechanical properties and keeping the low dielectric constant and loss of porous Si3N4 ceramic. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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