A method for producing a rare earth magnet, including preparing a melt of a first alloy having a composition represented by (R.sup.1.sub.vR.sup.2.sub.wR.sup.3.sub.x).sub.yT.sub.zB.sub.sM.sup.1.sub.t (wherein R.sup.1 is a light rare earth element, R.sup.2 is an intermediate rare earth element, R.sup.3 is a heavy rare earth element, T is an iron group element, and M.sup.1 is an impurity element, etc.), cooling the melt of the first alloy at a rate of from 10.sup.0 to 10.sup.2 K/sec to obtain a first alloy ingot, pulverizing the first alloy ingot to obtain a first alloy powder having a particle diameter of 1 to 20 m, preparing a melt of a second alloy having a composition represented by (R.sup.4.sub.pR.sup.5.sub.q).sub.100-uM.sup.2.sub.u (wherein R.sup.4 is a light rare earth element, R.sup.5 is an intermediate or heavy rare earth element, M.sup.2 is an alloy element, etc.), and putting the first alloy powder into contact with the melt of the second alloy.

A process for producing an electrode material by infiltrating a highly conductive metal such as Cu into a porous object containing heat-resistant elements. Before an infiltration step in which the highly conductive metal is infiltrated, a HIP treatment is given to a powder containing the heat-resistant elements (or to a molded object obtained by molding a powder containing the heat-resistant elements). The composition is controlled so that the HIP treatment yields a porous object which has a degree of filling of 70% or higher, more preferably 75% or higher. The highly conductive metal is infiltrated into the porous object having the controlled composition.

What is disclosed is an electrode material including a sintered body containing a heat resistant element and Cr and being infiltrated with a highly conductive material. A powder mixture of a heat resistant element powder and a Cr powder is subjected to a provisional sintering in advance, thereby causing solid phase diffusion of the heat resistant element and Cr. After a MoCr solid solution obtained by the provisional sintering is pulverized, the pulverized MoCr solid solution powder is molded and sintered. A sintered body obtained by sintering is subjected to a HIP treatment. The highly conductive metal is disposed on the sintered body after the HIP treatment, and infiltrated into the sintered body by heating at a predetermined temperature. By conducting the HIP treatment, the withstand voltage capability and current-interrupting capability of the electrode material are improved.

It is an electrode material that is used as an electrode contact of a vacuum interrupter and that contains one or more parts by weight of a heat-resistant element and one part by weight of Cr, the remainder being Cu and an unavoidable impurity. A part of Cr powder and the heat-resistant element powder are mixed together, and this mixed powder is sintered such that a peak corresponding to Cr element disappears in X-ray diffraction measurement. A solid solution powder obtained by pulverizing a sintered body of the heat-resistant element and Cr obtained by the sintering is mixed with the remaining Cr powder, and this mixed powder is shaped and then sintered. A sintered body obtained by this sintering is infiltrated with Cu.

A metal matrix composite to high tolerate wear as a property has been produced by infiltration casting of a Fe Alloy and a spinel ceramic by using a material design for i) metal transport phenomena conditions, ii) predefined wetting and capillarity and iii) processing child insert/mother casting methodology to produce a final casting in shape and form to meet the needs of a mining end user.

A part includes a three-dimensional porous metallic workpiece printed via an additive manufacturing process and subsequently subjected to a diffusion-based process to convert at least a portion of the porous metallic workpiece to a ceramic workpiece or an intermetallic workpiece.

Described are wrought forms of copper alloys for infiltrating powder metal parts, the method for preparing the copper alloys and their wrought forms, the method for their infiltration into a powder metal part, and the infiltrated metal part infiltrated with the novel alloys having a generally uniform distribution of copper throughout and exhibiting high transverse rupture strength, tensile strength and yield strength. Infiltrated metal parts prepared by infiltrating powder metal parts with reduced amounts of the novel infiltrant typically weigh less and have superior strengths compared to similarly prepared infiltrated metal parts prepared with standard methods and conventional infiltration.

A hardfaced product includes a substrate and a hard composite material bonded to the substrate. The composite material includes boron carbide as a wear-resistant material and a matrix alloy including manganese and at least one of copper, silver, gold, platinum or palladium. The hardfaced product can be made by applying a molten matrix alloy to a substrate wherein the matrix alloy is combined with a wear-resistant material. The matrix alloy includes manganese and at least one of copper, silver, gold, platinum or palladium. The wear-resistant material includes boron carbide.

A composite material includes: coated particles, each of which includes a carbon-based particle made of a carbon-based substance and a carbide layer that covers at least a part of the surface of the carbon-based particle; and a copper phase that binds the coated particles to each other, wherein the carbide layer is made of a carbide containing at least one element selected from the group consisting of Si, Ti, Zr and Hf, and the average particle size of the carbon-based particles is 1 m or more and 100 m or less.

A method of forming a metal matrix composite component includes positioning a preform including an electrically non-conductive fibrous material in a shaping tool. The fibrous material is pre-coated. The method includes flowing a molten metal comprising zinc into the shaping tool so that at least a portion of the preform is enveloped by the molten metal to form the metal matrix composite component; and cooling the metal matrix composite component.