Fabrication of low thermal expansion SiC/ZrW2O8 porous ceramics

Low or zero thermal expansion porous ceramics are required for several applications. In this work near zero thermal expansion porous ceramics were fabricated by using SiC and ZrW2O8 as positive and negative thermal expansion materials, respectively, bonded by soda lime glass. The mixture of SiC, ZrW...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2011-03, Vol.20 (1), p.012010
Main Authors: Poowancum, A, Matsumaru, K, Juárez-Ramírez, I, Torres-Martínez, L M, Fu, Z Y, Lee, S W, Ishizaki, K
Format: Article
Language:English
Subjects:
Ceramics
Particle size
Plasma sintering
Silicon carbide
Sintering (powder metallurgy)
Soda-lime glass
Spark plasma sintering
Thermal expansion
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Low or zero thermal expansion porous ceramics are required for several applications. In this work near zero thermal expansion porous ceramics were fabricated by using SiC and ZrW2O8 as positive and negative thermal expansion materials, respectively, bonded by soda lime glass. The mixture of SiC, ZrW2O8 and soda lime glass was sintered by Pulsed Electric Current Sintering (PECS, or sometimes called Spark Plasma Sintering, SPS) at 700 °C. Sintered samples with ZrW2O8 particle size smaller than 25 μm have high thermal expansion coefficient, because ZrW2O8 has the reaction with soda lime glass to form Na2ZrW3O12 during sintering process. The reaction between soda lime glass and ZrW2O8 is reduced by increasing particle size of ZrW2O8. Sintered sample with ZrW2O8 particle size 45-90 μm shows near zero thermal expansion.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/20/1/012010