The copper alloy composition is a Cu.sub.comp(Al.sub.2O.sub.3).sub.aZr.sub.bCr.sub.c mass composition in which, in mass percent 1.5%a5%, 0.01%b5%, 0%c5%, the complement consisting of copper and unavoidable impurities.

The present invention provides a method (1) of additively manufacturing an article comprising an oxide dispersion strengthened alloy, the method comprising: (5) providing a first powder comprising particles of one or more platinum group metals or an alloy thereof: (10) providing a second powder comprising particles of one or more non-platinum-group metals or metalloids, or one or more alloys thereof: (15) providing a third powder by mixing the first powder and the second powder, the third powder comprising from 0.01 to 1 wt. % of the second powder, based on the total weight of the third powder; and (20) forming an article by a powder bed fusion method using the third powder in an atmosphere comprising from greater than 0 to 2 mol. % oxygen.

A method to form a metal matrix composite reinforced with eggshell (ES). The method includes preparing an ES powder, blending and milling the ES powder with at least one metal powder selected from the group consisting of magnesium (Mg), zirconium (Zr) to form a powder mixture, compacting and sintering the powder mixture to form the metal matrix composite. In addition, a MgZr-ES metal matrix composite with improved corrosion resistance, having an amount of magnesium from 95 to 97 wt. %, an amount of zirconium from 1 to 2 wt. %, and an amount of ES from 1 to 4 wt. %, may be used for biomedical applications.

The present invention provides an Al-ND-based composite material in which nanodiamond (ND) particles are dispersed in an aluminum (Al)-based metal matrix.

The present invention provides an Al-ND-based composite material in which nanodiamond (ND) particles are dispersed in an aluminum (Al)-based metal matrix.

The metal matrix composite material for a horological component comprises a metal alloy based on gold, with at least 75% by weight of gold, or based on platinum, with at least 95% by weight of platinum, or based on palladium, with at least 95% by weight of palladium, the composite material further including between 0.1% and 2% by weight, or even between 0.5% and 2% by weight, or even between 0.5% and 1.5% by weight, or even between 0.5% and 1.25% by weight, or even between 0.5% and 1% by weight, of at least one hardening element, and a reinforcing material, in a proportion by mass of between 1% and 10%, or even between 1% and 5%, the reinforcing material including ceramic particles.

The metal matrix composite material for a horological component comprises a metal alloy based on gold, with at least 75% by weight of gold, or based on platinum, with at least 95% by weight of platinum, or based on palladium, with at least 95% by weight of palladium, the composite material further including between 0.1% and 2% by weight, or even between 0.5% and 2% by weight, or even between 0.5% and 1.5% by weight, or even between 0.5% and 1.25% by weight, or even between 0.5% and 1% by weight, of at least one hardening element, and a reinforcing material, in a proportion by mass of between 1% and 10%, or even between 1% and 5%, the reinforcing material including ceramic particles.

A method of making a composite, including mixing ZnO nanoparticles (NPs), Mg particles, and Zr particles under an inert atmosphere to form a powder mixture, compacting the powder mixture at a pressure of 500-600 MPa for at least 1 minute to form a compacted mixture, and sintering the compacted mixture at a temperature of 400-500 C. for at least 1 hour to form the composite. The composite includes 1-10 wt. % of the ZnO NPs and 0.1-5 wt. % of the Zr particles, based on a total weight of the composite, the Zr particles and the ZnO NPs are homogeneously dispersed in a matrix of the Mg particles in the composite, the Mg particles have an average grain size of 5-10 m in the composite, and the Zr particles and the ZnO NPs separately form aggregates at grain boundaries of the Mg particles in the composite.

A method of making a composite, including mixing ZnO nanoparticles (NPs), Mg particles, and Zr particles under an inert atmosphere to form a powder mixture, compacting the powder mixture at a pressure of 500-600 MPa for at least 1 minute to form a compacted mixture, and sintering the compacted mixture at a temperature of 400-500 C. for at least 1 hour to form the composite. The composite includes 1-10 wt. % of the ZnO NPs and 0.1-5 wt. % of the Zr particles, based on a total weight of the composite, the Zr particles and the ZnO NPs are homogeneously dispersed in a matrix of the Mg particles in the composite, the Mg particles have an average grain size of 5-10 m in the composite, and the Zr particles and the ZnO NPs separately form aggregates at grain boundaries of the Mg particles in the composite.

Provided is a process for preparing a molybdenum alloy by ultra-high-temperature rolling. The molybdenum alloy is an ultra-high strength and toughness molybdenum alloy, and includes 95 wt % to 99.9 wt % of molybdenum and 0.1 wt % to 5 wt % of a nano-ceramic oxide particle. The process includes: (1) preparing an MOxSO.sub.3H aqueous solution; (2) preparing a precursor composite powder; (3) preparing a nano-ceramic oxide-reinforced molybdenum alloy powder by reduction; and (4) preparing the ultra-high strength and toughness molybdenum alloy by pressing and sintering.