Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR MAKING CERAMIC MATRIX COMPOSITE ARTICLES
A method of forming a composite article may include impregnating an inorganic fiber porous preform with a first slurry composition. The slurry composition includes particles, a solvent, and a pre-gellant material. Gelling of the pre-gellant material in the slurry composition is initiated to substantially immobilize the particles and yield a gelled article. The method also includes impregnating the gelled article with a second solution that includes a high charyielding component, and pyrolyzing the high char-yielding component to yield carbon and form a green composite article. The green composite article is then infiltrated with a molten metal or alloy infiltrant to form the composite article. The molten infiltrant reacts with carbon, and the final composite article may include less residual metal or alloy than a composite article formed without using the second solution. Preferably molten Si is infiltrated in order to form SiC. The ceramic particles preferably contain SiC and the high-char yielding component comprises preferably furfuryl alcohol.
METHOD FOR MAKING CERAMIC MATRIX COMPOSITE ARTICLES
A method of forming a composite article may include impregnating an inorganic fiber porous preform with a first slurry composition. The slurry composition includes particles, a solvent, and a pre-gellant material. Gelling of the pre-gellant material in the slurry composition is initiated to substantially immobilize the particles and yield a gelled article. The method also includes impregnating the gelled article with a second solution that includes a high charyielding component, and pyrolyzing the high char-yielding component to yield carbon and form a green composite article. The green composite article is then infiltrated with a molten metal or alloy infiltrant to form the composite article. The molten infiltrant reacts with carbon, and the final composite article may include less residual metal or alloy than a composite article formed without using the second solution. Preferably molten Si is infiltrated in order to form SiC. The ceramic particles preferably contain SiC and the high-char yielding component comprises preferably furfuryl alcohol.
METHOD FOR MAKING CERAMIC MATRIX COMPOSITE ARTICLES
VERFAHREN ZUR HERSTELLUNG VON ARTIKELN AUS KERAMISCHEN MATRIX-VERBUNDWERKSTOFFEN
PROCÉDÉ DE FABRICATION D'ARTICLES COMPOSITES À MATRICE CÉRAMIQUE
HARRIS STEPHEN ISAIAH (Autor:in)
14.10.2020
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME