A polishing media is formed of a sintered body in which a metal structure and a ceramic structure are intermingled with each other. The polishing media is preferably produced by molding a mixed powder of a metal powder and a ceramic powder by an injection molding method and sintering the resulting molded article. Further, the ceramic structure is preferably formed of aluminum oxide, and the metal structure is preferably formed of tungsten.

A polishing media is formed of a sintered body in which a metal structure and a ceramic structure are intermingled with each other. The polishing media is preferably produced by molding a mixed powder of a metal powder and a ceramic powder by an injection molding method and sintering the resulting molded article. Further, the ceramic structure is preferably formed of aluminum oxide, and the metal structure is preferably formed of tungsten.

An object of the present invention is to develop a technique for providing a novel metal matrix composite capable of stably suppressing problems of conventional composites formed with a reinforcing material and a matrix material, such as a metal, the problems being, for example, inferior mechanical properties such as tensile and bending strengths to those of single-phase materials, such as a metal, coarser surface roughness due to, for example, chipping and wear of a cutting edge caused by fall-off of a reinforcing material or collision of a blade with a hard reinforcing material during precision shaping machining, and inferior workability. There is provided a metal-coated metal matrix composite formed by compounding a matrix material, such as a pure metal, and a reinforcing material, such as ceramic, wherein the reinforcing material is a porous molded body and regular unevenness is provided on the surfaces of the molded body, and thereby the metal-coated metal matrix composite has, on the surfaces thereof, a metal coating layer comprising the unevenness and being continuously integrated with the matrix material forming the composite; and the metal coating layer has a thickness of 0.5 mm to 5 mm, and the unevenness has a height difference of 0.1 mm or more and the height difference is within a range of 50% or less of the thickness of the metal coating layer, and the shape of the unevenness is periodic.

There is provided an inorganic particle composite body comprising a layer of a substrate formed of a plastically deformable solid material and an inorganic particle layer that is composed of inorganic particles that do not plastically deform under a condition under which the solid material plastically deforms, that contains gaps defined by the inorganic particles, and that adjoins the layer of the substrate, wherein part of the solid material is in at least part of the gaps in the inorganic particle layer. This inorganic particle composite body is produced by a method including a preparation step of preparing an inorganic particle structural body comprising a layer of a substrate formed of a plastically deformable solid material and an inorganic particle layer that is composed of inorganic particles that do not plastically deform under a condition under which the solid material plastically deforms, that contains gaps defined by the inorganic particles, and that adjoins the layer of the substrate; and a filling step of plastically deforming at least part of the solid material contained in the inorganic particle structural body, thereby filling at least part of the gaps in the inorganic particle layer with part of the plastically deformed solid material.

A post manufacture method and apparatus for reducing residual stresses present within a component. The component includes a substrate, a polycrystalline structure coupled thereto, and residual stresses present therein. The method includes obtaining a component from a component category, determining a critical temperature and a critical time period for the component category at which the component becomes structurally impaired, determining a heat treatment temperature and a heat treatment time period based upon the critical temperature and the critical time period, and heating one or more remaining components from the component category to the heat treatment temperature for the heat treatment time period. The apparatus includes a heater defining a heating chamber and a molten bath positioned within the heating chamber. The components are placed within the pre-heated molten bath and isolated from oxygen during heating to the heat treatment temperature for the heat treatment time period.

A method of designing a metal alloy powder having a miscibility gap at low temperature is disclosed. The method includes identifying a first metal element and a second metal to form a metal alloy. selecting a third metal having a miscibility gap with the metal alloy. and mechanically alloying the third metal and the metal alloy to form a metal alloy powder having a nanoscale grain size. The metal alloy powder can be engineered to have a phase separation temperature at which diffusion of the third metal occurs to phase separate as a nanoscale phase. The nanoscale phase can redissolve at a transition temperature higher than the phase separation temperature.

The present disclosure is directed to novel high entropy alloys, including refractory high entropy alloys, and methods of selecting high entropy alloys and refractory high entropy alloys with select nuclear application predetermined properties.

A composite material includes at least one reinforcing zone composed of tungsten carbide (WC) and titanium carbide (W, Ti)C and a manganese steel matrix; a manganese steel zone that surrounds each of the reinforcing zones; and an interface layer positioned between each of the reinforcing zones and the manganese steel zone. The average grain size of the (W, Ti)C particles in each of the reinforcing zone(s) is between 0.2-2 m and the average grains size of the WC particles in each of the reinforcing zone(s) is between 20-30 m.