A cubic boron nitride sintered body including cubic boron nitride and a binder phase, wherein a content of the cubic boron nitride is 40 volume % or more and 80 volume % or less; a content of the binder phase is 20 volume % or more and 60 volume % or less; an average particle size of the cubic boron nitride is 0.5 m or more and 4.0 m or less; the binder phase contains TiC and TiB.sub.2 and contains substantially no AlN and/or Al.sub.2O.sub.3; a (101) plane of TiB.sub.2 in the binder phase shows a maximum peak position (2) in X-ray diffraction of 44.2 or more; and a (200) plane of TiC in the binder phase shows a maximum peak position (2) in X-ray diffraction of less than 42.1.

A method of making a sintered ceramic body comprising the steps of disposing a ceramic powder inside an inner volume of a spark plasma sintering tool, wherein the tool comprises: a die comprising a sidewall comprising inner and outer walls, wherein the inner wall has a diameter defining the inner volume; upper and lower punches operably coupled with the die, wherein each of the punches have an outer wall defining a diameter less than the diameter of the die inner wall, thereby creating a gap between the punches and the inner wall when at least one of the punches are moved within the inner volume, and the gap is from 10 m to 70 m wide; creating vacuum conditions inside the inner volume; moving at least one of the punches to apply pressure to the ceramic powder while heating, and sintering; and lowering the temperature of the sintered body.

A method of dry etching a titanium carbide material of a substrate includes performing an oxidation step and a fluorination step. The oxidation step includes exposing the titanium carbide material to an oxidizing agent to form an oxidized layer including titanium oxide species and remove carbon from the titanium carbide material by forming volatilized carbon oxide species. The fluorination step includes exposing the titanium oxide species of the oxidized layer to a fluorinating agent to remove titanium from the titanium carbide material by forming volatilized fluorinated titanium oxide species. The method may be repeated as a cycle in situ within a processing chamber. The method may further include a substitution step that includes exposing a metallic fluoride species formed during the fluorination step to a substitution agent to remove metallic species from the titanium carbide material by forming volatilized metallic fluoride species.

The present invention relates to a process for preparing a composite, ultra-refractory, fibre-reinforced ceramic material obtained through the infiltration of carbon and/or silicon carbide fibres with a ceramic suspension comprising yttrium, lanthanum and/or scandium compounds, and the subsequent densification of the composite. The fibre-reinforced UHTC compounds obtained by the process can be used for making items intended for use in extreme temperature and pressure conditions.

The present invention relates to a process for preparing a composite, ultra-refractory, fibre-reinforced ceramic material obtained through the infiltration of carbon and/or silicon carbide fibres with a ceramic suspension comprising yttrium, lanthanum and/or scandium compounds, and the subsequent densification of the composite. The fibre-reinforced UHTC compounds obtained by the process can be used for making items intended for use in extreme temperature and pressure conditions.

An absorbing structure has a body provided on air vehicles. At least one transition metal alloy is located on the body that consists of two-dimensional inorganic compounds formed by bonding a plurality of carbon atoms and a plurality of nitrogen atoms. A plurality of layers contain the transition metal alloy. At least one barrier coating consists of the layers, which based on a conductivity of the layer, prevents and provides protection against plastic and/or elastic deformations that may occur on the body when an electromagnetic wave acts on the body.

A cutting tool includes a supporting body and a cBN or PCD cutting edge tip attached to the supporting body via a 5-150 m braze joint. The supporting body is cemented carbide having 3-25 wt % of a metallic binder, optionally up to 25 wt % of carbides or carbonitrides of one or more elements of group 4, 5, or 6, and the rest WC. The metallic binder includes at least 40 wt % Ni, and the braze joint has, in the order from the supporting body, a first layer of TiC situated next thereto, with an average thickness of 10-400 nm, a second layer, with an average thickness of 0.5-8 m, having in average at least 5 wt % metallic Ni, in average 25-60 wt % metallic Cu and in average 15-45 wt % metallic Ti, and a third layer, with an average thickness of 4-145 m, having metallic Ag and metallic Cu.