Publication Type
Journal
Journal Name
Journal of the American Ceramic Society
Publication Date
Page Numbers
1120 to 1126
Volume
93
Issue
4
Abstract
The mode I fracture toughness of fibrous SiC and mullite materials with 60 - 70% porosity was determined under ambient conditions using the double-torsion test method. The fracture toughness values obtained were 0.27 MPam and 0.34 MPam for fibrous SiC and mullite, respectively. These fibrous ceramics exhibit greater fracture resistance than porous monolithic ceramics with similar levels of porosity. Such differences in fracture behavior can be explained by the microstructural differences between these two classes of materials. The combination of high porosity and high fracture toughness for fibrous materials makes them ideal candidates for applications in diesel particulate filtration.
