Strength and Toughness Measurements of Ceramic Fiber Composites

1986 ◽  
pp. 53-60 ◽  
Author(s):  
Carl Cm. Wu ◽  
David Lewis ◽  
Karl R. McKinney
Keyword(s):  
Fiber Composites ◽  
Ceramic Fiber ◽  
Strength And Toughness

Electrical and Thermal Properties of Carbon-Coated Porous Ceramic Fiber Composites

2005 ◽  
pp. 370-373
Author(s):  
Jun Suh Yu ◽  
Sung Park ◽  
Jae Chun Lee ◽  
In Sup Hahn ◽  
Sang Kuk Woo
Keyword(s):  
Thermal Properties ◽  
Porous Ceramic ◽  
Fiber Composites ◽  
Ceramic Fiber ◽  
Carbon Coated

Sealing Properties of Ceramic Fiber Composites for SOFC Application

2007 ◽  
Vol 124-126 ◽  
pp. 803-806 ◽  
Author(s):  
Jae Chun Lee ◽  
Hyuk Chon Kwon ◽  
Young Pil Kwon ◽  
Ju Hyeon Lee ◽  
Sung Park
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Operating Temperature ◽  
Fiber Composites ◽  
Solid Oxide ◽  
Ceramic Fiber ◽  
Sealing Performance ◽  
Alumino Silicate ◽  
Beam Bending ◽  
Silicate Ceramic ◽  
Glass Viscosity

For the sealing of solid oxide fuel cells (SOFCs), mid-term (~1,000 h) sealing performance was examined using composite seals prepared with mixtures of a glass and alumino-silicate ceramic fiber. Leak rate could be reduced to < ~0.04 sccm/cm when using a composite seal with 60 vol% glass. Viscosity of the glass at the seal operating temperature of 650 was 2.0×108 dPa·s (log η = 8.3) as estimated by beam-bending method, and found to be suitable for sealing operation.

Characterization of ceramic fibers in the SEM and TEM

1986 ◽  
Vol 44 ◽  
pp. 670-673
Author(s):  
L.C. Sawyer ◽  
R.T. Chen
Keyword(s):  
Surface Defects ◽  
Fiber Composites ◽  
Ceramic Fiber ◽  
Ceramic Fibers ◽  
Amorphous Phases ◽  
Polymer Precursors ◽  
Structural Applications ◽  
Crystallite Sizes ◽  
As Stress

Ceramic fiber composites are currently being developed for potential high temperature structural applications. Fibers for these applications are being produced from polymer precursors, such as Nicalon™ silicon carbide (SiC) fibers, commercially produced from polycarbosilane (Nippon Carbon Co.). Experimental ceramic fibers are also being produced as part of a DARPA funded government program by Dow Corning and Celanese. The physical properties of glass and ceramic fibers are well known to be controlled by microstructural features such as crystallinity and crystallite sizes, the nature of amorphous phases, porosity and internal and surface defects or flaws. Defects are known to act as stress concentrators, and the well known Griffith criteria relates their sizes to the tensile stress.

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