A shaping method includes irradiating a powder containing silicon carbide and metal boride with an energy beam based on shape data of an object of shaping to perform shaping, in which the metal boride has a melting point lower than the sublimation point of the silicon carbide.

A method of making a ceramic matrix composite article includes fabricating a preform comprising a plurality of fibers arranged in an arrangement, wherein there are spaces between adjacent ones of the fibers; providing particles to the preform, whereby the particles are situated in the spaces; and applying a matrix material to the preform by atomic layer deposition to make a ceramic matrix composite article. A ceramic matrix composite article is also disclosed.

The invention describes a method for producing ternary and binary ceramic powders and their thermal spraying capable of manufacturing thermal sprayed coatings with superior properties. Powder contain at least 30% by weight ternary ceramic, at least 20% by weight binary molybdenum borides, at least one of the binary borides of Cr, Fe, Ni, W and Co and a maximum of 10% by weight of nano and submicro-sized boron nitride. The primary crystal phase of the manufactured thermal sprayed coatings from these powders is a ternary ceramic, while the secondary phases are binary ceramics. The coatings have extremely high resistance against corrosion of molten metal, extremely thermal shock resistance and superior tribological properties at low and at high temperatures.

A composite composed of two principal strengthening compounds and one principal cementing refractory metal that is prepared by combining a suitable binary to senary borides and/or carbides with a unitary to binary principal refractory metal is disclosed. As compared with the conventional sintered cemented carbides, the composite of the disclosure not only possess high hardness and high toughness but also has various ratios of principal components since it is not prepared with equal mole during the process.

A toughened ceramic material includes at least one boride and a refractory metal, or at least two borides, one carbide at least, and a refractory metal. The toughened ceramic material is by means of heating and smelting the above materials. During the process of preparing the toughened ceramic material by heating and smelting, substantially all the refractory metal reacts with the boride and/or the carbide to form a toughened ceramic material with a high toughness and substantially without metallic cemented phase.

Disclosed herein are compounds, methods, and tools which comprise tungsten borides and mixed transition metal borides.

A shaping method includes irradiating a powder containing silicon carbide and metal boride with an energy beam based on shape data of an object of shaping to perform shaping, in which the metal boride has a melting point lower than the sublimation point of the silicon carbide.

Disclosed is a method of making high temperature fiber including chemically bonding high temperature material to a fiber template at a first temperature to form a precursor fiber and processing the precursor fiber at a second temperature to form the high temperature fiber. The first temperature does not equal the second temperature. Also disclosed are high temperature fibers made by the method.

The present invention relates to a process for the production of fiber-reinforced composite materials with an ultra-refractory, high tenacity, high ablation resistant matrix with self-healing properties, prepared from highly sinterable slurries. The composite material is produced using techniques of infiltration and drying at ambient pressure or under vacuum, and consolidated by sintering with or without the application of gas or mechanical pressure.

A silicide-based composite material is disclosed, comprising a silicide of Mo, B, W, Nb, Ta, Ti, Cr, Co, Y, or a combination thereof, Si3N4, and at least an oxide, as well as and a process for producing the same.