摘要:
There is provided a fiber-reinforced brittle matrix composite. The fiber-reinforced brittle matrix composite comprises a brittle matrix material (for example, a cementitious or ceramics material) and a coated fiber embedded in the brittle matrix material, wherein the coated fiber comprises a fiber (for example, polyethylene fiber, glass fiber, silicon carbide fiber, alumina fiber, mullite fiber) and a coating material (for example, carbon nanofibers, carbon nanotubes), which is non-covalently disposed on the fiber. A method for producing the fiber-reinforced brittle matrix composite is also provided. The method comprises providing a fiber, disposing a coating material on the fiber to form a coated fiber, wherein the coating material is non-covalently disposed on the fiber, and embedding the coated fiber in a brittle matrix material to obtain the fiber-reinforced brittle matrix composite.
摘要:
Die vorliegende Erfindung betrifft einen neuartigen Verbundwerkstoff, ein Verfahren zu dessen Herstellung sowie die Verwendung dieses Verbundwerkstoffs.
摘要:
The present application discloses and claims a method to make a flexible ceramic fibers (Flexiramics TM ) and polymer composites. The resulting composite has an improved mechanical strength (tensile) when compared with the Flexiramics TM respective the nanofibers alone. Additionally a composite has better properties than the polymer alone such as lower fire retardancy, higher thermal conductivity and lower thermal expansion. Several different polymers can be used, both thermosets and thermoplastics. Flexiramics TM has unique physical characteristic and the composite materials can be used for numerous industrial and laboratory applications.
摘要:
A composition of matter, and method of manufacture, of a material having a porous mass including a bound and reduced composite of graphene formed by in-situ reduction of graphene oxide, and either carbon nanotubes or carbon nanofibers. In particular embodiments, the mass is directionally porous, with pores having average length over 10,000 microns and average cross sectional area less than 2500 square microns and more than 25 square microns. In embodiments, heat treatment at between 400 and 2000 degrees Celsius in non-oxidizing atmosphere is used to reduce graphene oxide to graphene while binding the graphene to the carbon nanotubes or nanofibers, in an alternative embodiment graphene oxide is reduced chemically. Graphene and/or graphene oxide is present at a ratio between 2:1 and 1:4 in proportion to carbon nanotubes or nanofibers. The material can be made with porosity 75 to 99 percent.
摘要:
A method and apparatus for producing boron nitride nanotubes and continuous boron nitride nanotube yarn or tapes is provided. The apparatus includes rotating reaction tubes that allow for continuous chemical vapor deposition of boron nitride nanotubes. The rotation of the reaction tubes allows the boron nitride nanotubes to be spun into yarns or made into tapes, without post process or external rotation or spinning of the gathered nanotubes. Boron nitride nanotube yarns or tapes of great length can be produced as a result, thereby providing industry with a readily useable format for this type of material. Dopants such as carbon can be added to engineer the band gap of the nanotubes. Catalysts may be formed outside or inside the reactor.
摘要:
A method of making a composite sheet, a method of making composite component and a composite component are provided. The method of making a composite sheet includes providing a container, adding a binder to the container, adding a plurality of randomly oriented fibers to the binder in the container, and subjecting the container to motion to coat the plurality of randomly oriented fibers with the binder. The method includes curing the binder and coated plurality of randomly oriented fibers to form a composite sheet. The plurality of randomly oriented fibers of the composite sheet are interlocked within the binder. The composite has uniform strength in all planar directions.
摘要:
A composition having nanoparticles of silicon carbide and a carbonaceous matrix or silicon matrix. The composition is not in the form of a powder. A composition having silicon and an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining silicon and the organic compound and heating to form silicon carbide or silicon nitride nanoparticles.