One aspect generally relates to a composite, having a layer sequence. The layer sequence includes as layers a first layer, including a first ceramic, and first layer surface, a second layer, including a second ceramic, superimposing the first layer surface. The layer sequence includes a hole, connecting through each layer of the layer sequence; and a cermet. The cermet includes a first part and a second part. The first part is included by the hole. The second part is included between the first layer and the second layer. The cermet is in one piece.

The invention relates to an alloy produced by powder metallurgy and having a non-amorphous matrix, the alloy consists of in weight % (wt. %): C 0-2.5 Si 0-2.5 Mn 0-15 Cr 0-25 Mo 4-35 B 0.2-2.8 optional elements, balance Fe and/or Ni apart from impurities, wherein the alloy comprises 3-35 volume % hard phase particles, the hard phase particles comprises at least one of borides, nitrides, carbides and/or combinations thereof, at least 90% of the hard phase particles have a size of less than 5 m and at least 50% of the hard phase particles have a size in the range of 0.3-3 m.

A method for synthesizing a metal matrix nanocomposite (MMNC) is an in-situ synthesis technique for preparing a metal matrix with ceramic reinforcements dispersed homogenously therein. The method includes mixing a base metal matrix material with two or more ceramic-forming elements to form a mixture; blending the mixture; drying the mixture; ball milling the mixture with a plurality of milling balls to form a milled mixture; using induction heating to form a melt flow and induce electromagnetic forces; and initiating a plurality of stirring vortexes in the melt flow to form the metal matrix nanocomposite.

An additive manufacturing method for making a metal matrix composite component includes melting a powdered mixture with an electron beam. The powdered mixture comprises powdered tungsten carbide in an amount of 45 wt % to 72 wt % of the powdered mixture and a powdered binder in an amount of 28 wt % to 55 wt % of the powdered mixture. The powdered binder comprises boron, silicon, and nickel.

A cutting tool comprising a blade portion having a sharpened edge area and a body portion, wherein the body portion comprises a casted metal or a ceramic, wherein the sharpened edge area comprises at least 50% by volume of amorphous alloy material, the amorphous alloy material being limited to the sharpened edge area, and a method of forming the cutting tool having a blade portion having a sharpened edge and a body portion. The body portion is formed from a metal or a ceramic and the sharpened edge includes an amorphous alloy material thereon, is described. The sharpened edge area may have at least 50% by volume of amorphous alloy material. The amorphous alloy may be chromium-based, iron-based, or zirconium-based. A thickness of the amorphous alloy material on the sharpened edge may be between approximately 2 to 5 microns.

A cutting tool comprising a blade portion having a sharpened edge area and a body portion, wherein the body portion comprises a casted metal or a ceramic, wherein the sharpened edge area comprises at least 50% by volume of amorphous alloy material, the amorphous alloy material being limited to the sharpened edge area, and a method of forming the cutting tool having a blade portion having a sharpened edge and a body portion. The body portion is formed from a metal or a ceramic and the sharpened edge includes an amorphous alloy material thereon, is described. The sharpened edge area may have at least 50% by volume of amorphous alloy material. The amorphous alloy may be chromium-based, iron-based, or zirconium-based. A thickness of the amorphous alloy material on the sharpened edge may be between approximately 2 to 5 microns.

In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.

The invention relates to a coating for coating a base body comprising iron; and from 10% to 25% by weight of chromium; and from 0.3% to 5% by weight of carbon; and from 0.5% to 15% by weight of vanadium.

Methods of forming at least a portion of an earth-boring tool include providing particulate matter including a hard material in a mold cavity, melting a metal and the hard material to form a molten composition comprising a eutectic or near-eutectic composition of the metal and the hard material, casting the molten composition to form the at least a portion of an earth-boring tool within the mold cavity, and providing an inoculant within the mold cavity. Methods of forming a roller cone of an earth-boring rotary drill bit include forming a molten composition, casting the molten composition within a mold cavity, solidifying the molten composition to form the roller cone, and controlling grain growth using an inoculant as the molten composition solidifies. Articles including components of earth-boring tools are fabricated using such methods.

High temperature rolling element bearings and methods for manufacturing high temperature bearing components, such as bearing races or rings, are provided. In one embodiment, the method includes obtaining a powder mixture containing a superalloy powder admixed with hard wear particles, such as carbide particles. The powder mixture is consolidated utilizing a spark plasma sintering process during which the powder mixture is compressed into a sintered blank, while an electrical current is conducted through the powder mixture to heat the powder mixture to a sintering temperature. The sintered blank is then machined to impart the bearing component with its final shape. Precipitate hardening may also be performed, if desired. The spark plasma sintering process is controlled to limit the temperature and duration of the powder consolidation process thereby imparting the resulting bearing component with an enhanced hot hardness and other desirable properties at highly elevated operating temperatures.