ISSN:
1551-2916
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Maschinenbau
,
Physik
Notizen:
This paper investigates sol-gel processing of three-dimensional (3-D) ceramic-matrix composites, focusing on the effect of addition of particles on drying stresses and composite green density. A 3-D woven carbon fiber/silica composite was used as the model material system for the investigation. Composites were fabricated with silica particle additions to the silica sol using a pressure infiltration technique, and the drying rate and matrix cracking were characterized. The particle size was varied in order to study the role of particle additions in the processing. Ammonium hydroxide (NH4OH) and a particle coating agent, 3-(trimethoxysilyl)propyl methacrylate (TPM), were added in the mixture of particles and sol to improve particle packing in the preform. Sol-gel processing with the addition of particles proves to be an effective route to fabricate 3-D ceramic-matrix composites with higher green density and less matrix cracking.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1151-2916.1998.tb02553.x
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