摘要:
An apparatus for making a composite article includes a monofilament feed track adapted to carry a spaced array of ceramic monofilament strands, a fiber yarn feed track adapted to carry a spaced array of fiber yarn tows impregnated with a plurality of glass particulates, a mandrel, and a heater assembly. The mandrel is adapted to wind together individual glass-impregnated fiber yarn strands and individual ceramic monofilament strands to form a dual-fiber weave. The heater assembly is adapted to heat at least the glass particulates such that pressure from the wound array of ceramic monofilaments is sufficient to consolidate the glass particulates and the dual-fiber weave into a dual-fiber ceramic matrix composite (CMC).
摘要:
The invention relates to a composite material which includes a ceramic body incorporating ceramic particles bonded in a glass matrix and which is reinforced by continuous metal fibres configured to provide tensile constraint within the material. The invention also relates to processes of casting, fuse-casting and forming such a composite. The invention further relates to armour and building material formed from the composite material.
摘要:
A glass ceramic composition for sealing adjacent metal cassettes in an SOFC stack. The seal composition comprises an alumina-silicate glass ceramic matrix and a ceramic fiber aggregate dispersed in the matrix. Preferably, the fiber is selected from the group consisting of zirconium oxide fiber, alumina fiber, and combinations thereof. Preferably, the fiber is present at 1-60 weight percent with respect to the weight of glass ceramic, preferably about 30 weight percent. Preferably, the zirconia is stabilized by up to about 10% yttria. Alumina fiber may substitute for a portion of the zirconia fiber. Preferably, a green seal is die cut from a green tape sheet formed by extrusion of a slurry comprising water and a latex binder. The green seal is sintered during the final SOFC stack assembly process to form the final stack seal.
摘要:
A black glass having the empirical formula SiCxOy where x is greater than zero and up to about 2.0 and y is greater than zero and up to about 2.2 is produced from a cyclosiloxane polymer precursor by pyrolysis in the presence of oxygen by heating at a rate exceeding about 5 °C/min.
摘要:
A protective layer for polymeric composite substrates comprises a fiber-reinforced glass composite having a refractory fiber in a matrix of a black glass ceramic having the empirical formula SiCxOy where x ranges from about 0.5 to about 2.0, preferably 0.9 to 1.6 and y ranges from about 0.5 to 3.0, preferably 0.7 to 1.8. The black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group.
摘要:
A protective layer for polymeric composite substrates comprises a fiber-reinforced glass composite having a refractory fiber in a matrix of a black glass ceramic having the empirical formula SiCxOy where x ranges from about 0.5 to about 2.0, preferably 0.9 to 1.6 and y ranges from about 0.5 to 3.0, preferably 0.7 to 1.8. The black glass ceramic is derived from cyclosiloxane monomers containing a vinyl group attached to silicon and/or a hydride-silicon group.
摘要:
Un composite matriciel en verre renforcé par des fibres comporte une matrice en verre ainsi qu'une pluralité de fibres de renforcement primaires et secondaires dispersées dans la matrice. Les fibres de renforcement secondaires sont plus courtes que les fibres primaires. Le composite peut être produit par répartition uniforme des fibres de renforcement secondaires dans un dispersant. On mélange une poudre de verre dans un liquide porteur afin de créer une suspension épaisse, et on ajoute lentement les fibres de renforcement secondaires ainsi que le dispersant à ladite suspension épaisse de manière que les fibres se dispersent uniformément à mesure qu'elles sont ajoutées. On peut également ajouter un liant à ladite suspension épaisse. On imprègne une fibre continue de ladite suspension épaisse, et l'on sèche la fibre imprégnée afin d'en extraire le liquide porteur. On coupe le fil imprégné à une longueur appropriée et on le moule selon un procédé de moulage approprié afin de former un composite matriciel en verre renforcé par des fibres.
摘要:
A compact reinforced composite comprising a matrix (A) with a reinforcement (B) embedded therein, the matrix (A) being a composite structure comprising a base matrix (C) which is reinforced with reinforcing bodies (D) in the form of fibers. The transverse dimension of (B) being at least 5 times as large as the transverse dimension of (D).