Articles comprising carbon composites are disclosed. The carbon composites contain carbon microstructures having interstitial spaces among the carbon microstructures; and a binder disposed in at least some of the interstitial spaces; wherein the carbon microstructures comprise unfilled voids within the carbon microstructures. Alternatively, the carbon composites contain: at least two carbon microstructures; and a binding phase disposed between the at least two carbon microstructures; wherein the binding phase comprises a binder comprising one or more of the following: SiO.sub.2; Si; B; B.sub.2O.sub.3; a metal; or an alloy of the metal; and wherein the metal is at least one of aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

Silicon anode compositions are provided which include embedded silicon carbide nanofibers. Methods of production and use are further described.

Silicon anode compositions are provided which include embedded silicon carbide nanofibers. Methods of production and use are further described.

Disclosed is a multi nanolayer interface coating for a fiber of a composite including a first interface coating nanolayer deposited onto the fiber of the ceramic matrix composite, and a second interface coating nanolayer deposited onto the first interface coating nanolayer.

Compositions for use in an anode of a secondary battery, anodes, and lithium ion batteries are provided which include embedded silicon carbide nanofibers. Methods of production and use are further described.

A system and method for forming a ceramic matrix composite blade track is provided. The method may include stacking a plurality of first plies to form a first porous preform layer, the first plies including a plurality of first ceramic fibers. The method may further include stacking a plurality of second plies to form a second porous preform layer, the second plies including a plurality of second ceramic fibers. The method may further include combining the first porous preform layer and the second porous preform layer to form a unified porous preform. The method may further include forming a structural layer by infiltrating the first porous preform with a first ceramic matrix material, and forming an abradable layer by infiltrating the second porous preform with a second ceramic matrix material.

A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350 C. to about 1200 C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof wherein the nonmetal is selected from the group consisting of SiO.sub.2, Si, B, B.sub.2O.sub.3, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

Methods of forming a metallic-ceramic brazed joint are disclosed herein. The method of forming the brazed joint includes deoxidizing the surface of metallic components, assembling the joint, heating the joint to fuse the joint components, and cooling the joint. In certain embodiments, the brazed joint includes a conformal layer. In further embodiments, the brazed joint has features in order to reduce stress concentrations within the joint.

Disclosed are: damage-resistant ECMCs that need to work and remain elastic between minus 120 C. and positive 300 C.; ECMCs that need to be able to contain a flame of 1900 C. for more than 90 minutes; and composite structures, especially highly stressed structures. One of the characteristic problems of ceramic matrices is their fragility. Indeed, when a fracture starts, it propagates easily in the matrix. Disclosed are elastic ceramic matrix composites (ECMCs), for which: the ceramic matrix is split into solid ceramic microdomains (CMDs); the CMDs are connected to one another by a dense network of elastic microelements (EMEs); and the bonds between the EMEs and the CMDs are strong chemical bonds, preferably covalent.

A method for fabricating a ceramic material includes impregnating a porous structure with a mixture that includes a preceramic polymer and a filler. The filler includes at least one free metal. The preceramic polymer material is then rigidized to form a green body. The green body is then thermally treated to convert the rigidized preceramic polymer material into a ceramic matrix located within pores of the porous structure. The same thermal treatment or a second, further thermal treatment is used to cause the at least one free metal to move to internal porosity defined by the ceramic matrix or pores of the porous structure.