US EPA

7495808 

Meetings & Symposia 

Effects of SiO2 additives on fabrication properties of LPS-SiC ceramics 

Jung, HC; Yoon, HK; Park, JS; Kohyama, A 

2005 

Yes 

International Offshore and Polar Engineering Conference. Proceedings
ISSN: 1098-6189 

Seoul, SOUTH KOREA 

PROCEEDINGS OF THE FIFTEENTH (2005) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4 

2005 

449-453 

English 

WOS:000232030900071 

http://://WOS:000232030900071
Exit
 

In the present work, monolithic liquid phase sintered SiC (LPS-SiC) was made by hot pressing method with nano-SiC powder. Alumina (Al2O 3), yttria (Y2O3) and silica (SiO2) were used for sintering additives and Al2O3/Y 2C3 composition was fixed and then ratios of SiO 2 were changed as four kinds. Materials have been sintered for 1 hour at 1760°C, 1780°C, 1800°C and 1820°C under the pressure of 20MPa. The system of sintering addictives which affects a property of sintering as well as the influence depending on compositions of sintering addictives were investigated by measurement of density, besides, mechanical properties such as flexural strength, elastic modulus were investigated to make sure of the optimum condition which is about matrix of SiCf/SiC composites. Sintered density, flexural strength and elastic modulus of fabricated LPS-SiC increased with increasing the sintering temperature. Particularly, relative density of sintered body at 1800°C with the less content of SiO2, specimen of AYSa-1800 was 95%. Also, flexural strength and elastic modulus were 587.5MPa and 216.3GPa, respectively. Copyright © 2005 by The International Society of Offshore and Polar Engineers. 

Additive Composition; Hot Pressing; LPS (Liquid Phase Sintering); Process Temperature; Strength Property