An electro-conductive paste includes a metal particle and a vehicle in which the metal particle is dispersed. The metal particle has a particle size in a range from 1 m to 20 m and consists of an outer shell and a core part. The core part contains Sn or a Sn alloy. The outer shell contains an intermetallic compound of Sn and Cu and covers 50% or more of a total surface area of the core part.

A sintered magnet contains SmFeN-based crystal grains and has high coercivity; and a magnetic powder is capable of forming a sintered magnet without lowering the coercivity even if heat is generated in association with the sintering. A sintered magnet comprises a crystal phase composed of a plurality of SmFeN-based crystal grains and a nonmagnetic metal phase present between the SmFeN crystal grains adjacent to each other, wherein a ratio of Fe peak intensity I.sub.Fe to SmFeN peak intensity I.sub.SmFeN measured by an X-ray diffraction method is 0.2 or less. A magnetic powder comprises SmFeN-based crystal particles and a nonmagnetic metal layer covering surfaces of the SmFeN crystal particles.

Formulations of reactive materials, such as aluminum, magnesium and alloys thereof, with combustible additives such as wood derivatives or charcoal, provide a composition for neutralizing energetic materials via combustion. Specifically, explosive substances such as ammonium nitrate and urea nitrate, which are commonly used as homemade explosives, are rapidly incinerated in a non-propagating manner by the contact with burning reactive material formulations.

The method includes providing a powder that has heterogeneous particles with a ratio, by weight, of an amount of nickel to an amount of a metal. The ratio is selected in accordance with a compositional ratio that can substantially bear a nickel intermetallic precipitate of the nickel and the metal. The heterogeneous particles are then consolidated and thermally treated to interdiffuse the nickel and the metal. The interdiffused nickel and metal are then precipitation treated to precipitate the nickel intermetallic.

Provided is a nickel-based composite coating, method for producing the same and use thereof. A powder mixture is coated on the surface of a substrate to obtain a nickel-based composite coating, wherein the powder mixture comprises nickel-chromium-boron-silicon powders and barium titanate powders. The barium titanate powders are added to the nickel-based powders as a second phase to form BaTiO.sub.3NiCrBSi metal-based ceramic composite coating. The nickel-based barium titanate composite coating has an excellent damping shock absorbing performance and gives the substrate strength as well. Comparing with the conventional coating materials, the coating obtained by the present disclosure through plasma cladding technique not only bonds with the substrate in a metallurgic way, but also has a small heat affected zone, specifically, an excellent damping shock absorbing performance. In embodiments of the present disclosure, vibration and noise generated by the cylinder head is reduced 20% by using the shock absorbing cladding coating.

Included is a method of preparing a compound for bonded magnets, the method including: coating a magnetic material having an average particle size of 10 m or less with a thermosetting resin and a curing agent at a ratio of the equivalent weight of the curing agent to the equivalent weight of the thermosetting resin of 2 or higher and 10 or lower to obtain a coated material; granulating the coated material by compression to obtain a granulated product; milling the granulated product to obtain a milled product; and surface treating the milled product with a silane coupling agent to obtain a compound for bonded magnets, the method either including, between the granulation and the milling, heat curing the granulated product to obtain a cured product, or including, between the milling and the surface treatment, heat curing the milled product to obtain a cured product.

The present invention relates to a metal powder material containing: metal particles having a particle diameter d10 of 10 m or more and 100 m or less; and nanoparticles containing a metal or a metal compound, in which the particle diameter d10 is a particle diameter at which an under-sieve cumulative fraction in a mass base distribution of particle diameter reaches 10%, and the nanoparticles are adhered to or mixed with the metal particles.

A method for preparing nano-SiO.sub.2 reinforced aluminum matrix composites, includes the following: Step-1, powder mixing: mixing aluminum matrix powder with nano-SiO.sub.2 powder to obtain raw material powder, wherein the aluminum matrix powder has an average particle size between 30 m to 100 m, the nano-SiO.sub.2 powder has an average particle size between 5 nm to 145 nm, mass percentage of nano-SiO.sub.2 in the raw material powder is 0.01% to 5% and the remaining raw material powder is the aluminum matrix powder; Step-2, shaping: press shaping the powder obtained in the Step-1 to obtain base bodies; Step-3, sintering: sintering the base bodies obtained in the Step-2 in an atmosphere of N.sub.2 at 550 C. to 660 C., preserving the temperature for a period of 5 min to 60 min, and cooling in a furnace at end of the period under protection of N.sub.2 for 0.5 h to 3 h; and Step-4, heat treatment.

Methods for millling particles include exposing particles to microwave energy during milling. The methods reduce or eliminate the need for pre- and post-processing of reagents and products while minimizing waste associated with the slow kinetics of heat transfer in traditional resistive heating furnaces. Method of synthesizing particles include providing precursor particles, microwave susceptor media, and milling media in a reaction vessel and simultaneously rotating the reaction vessel while exposing the reaction vessel to microwaves. Apparatus for milling particles include a microwave housing defining a microwave enclosure; a microwave generator configured to generate and direct microwaves to the microwave enclosure; and a rotation shaft within the microwave enclosure, the rotation shaft connected or configured to be connected to a motor for rotation, wherein the rotation shaft is configured to be rotatably coupled, within the microwave enclosure, to a processing vessel.

An interlayered structure for joining of dissimilar materials, includes a first material substrate, a second material substrate having a composition dissimilar from a composition of the first material substrate, and a plurality of interlayers disposed between the first material substrate and the second material substrate, including a first interlayer nearest to the first material substrate and a last interlayer nearest to the second material substrate. The first interlayer has a composition selected to have a maximum solid solubility within the composition of the first material substrate that is greater than or equal to the other interlayers' solubility within the composition of the first material substrate. The last interlayer has a composition selected to have a maximum solid solubility within the composition of the second material substrate that is greater than or equal to the other interlayers' solubility within the composition of the second material substrate. At least one of the plurality of interlayers is a sintered powder interlayer.