"The development of ceramic fiber reinforced ceramic matrix composites has been shown to be a promising approach for high toughness ceramic materials. The purpose of this work was to develop a new ceramic matrix composite(CMC) system based on a porous mullitic matrix reinforced with ceramic fibers. Unidirectional alligned fiber reinforced mullitic matrix composites were fabricated by a filament winding process. Prepregs were laminated and thermal processed in air. SEM fractographs of the composites were characterized and related to the observed load-deflection behaviors under 3-point flexure. The fracture surface expositions changed from extensive fiber tear-out to limited fiber pull-out as the firing temperature increased from 1250°C to 1450°C. Porosity of the current CMC system appeared to be less insensitive to the firing temperature than did the strength. Increase in strength as the firing temperature increased from 1150°C to 1250°C was considered to be the result of development of a stronger bond between fibers and matrix. However, strength of the composite decreased as the firing temperature increased from 1250°C to 1450°C due to the degradation of the reinforcing fibers. SEM fractography and load-deflection behavior of a Tyranno fiber reinforced porous mullitic matrix composite, fired at 1250°C, showed characteristics of ceramic matrix composites toughened by matrix/fiber interaction mechanisms. Although the flexure strength of this CMC system was fairly low(178 MPa), the results provide a basis for further investigation of low to medium temperature systems, toughened by the tear-out mechanism”
Moore, Robert E., 1930-2003
Rahaman, M. N., 1950-
Dharani, Lokeswarappa R.
Materials Science and Engineering
M.S. in Ceramic Engineering
University of Missouri--Rolla
vi, 46 pages
© 1988 Wen-Chiang Tu, All rights reserved.
Thesis - Restricted Access
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://laurel.lso.missouri.edu/record=b2140325~S5
Tu, Wen-Chiang, "Processing and characterization of ceramic fiber reinforced porous matrix composites" (1988). Masters Theses. 695.
Share My Thesis If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.