A ceramic-reinforced aluminum matrix composite is formed by contacting a molten aluminum-magnesium alloy with a permeable mass of ceramic material in the presence of a gas comprising from about 10 to 100% nitrogen, by volume, balance non-oxidizing gas, e.g., hydrogen or argon. Under these conditions, the molten alloy spontaneously infiltrates the ceramic mass under normal atmospheric pressures. A solid body of the alloy can be placed adjacent a permeable bedding of ceramic material, and brought to the molten state, preferably to at least about 700° C., in order to form the aluminum matrix composite by infiltration. In addition to magnesium, auxiliary alloying elements may be employed with aluminum. The resulting composite products may contain a discontinuous aluminum nitride phase in the aluminum matrix and/or an aluminum nitride external surface layer.

Metal matrix composites

A filter pack includes a filter construction and a sealing system for sealing the construction within a duct or housing. The filter construction has first and second opposite flow faces and is configured for a straight-through flow. The sealing system includes a frame construction and a compressible seal member. The compressible seal member is molded around a portion of the frame construction. The compressible seal member is sufficiently compressible to form a radial seal between and against the frame construction and a surface of a housing when the filter pack is inserted within the housing.

Filter arrangement; sealing system; and methods

A catalyst-carrying filter (10) which comprises a ceramic carrier (4) being made of SiC and having an average pore diameter of 10 to 250 νm and a porosity of 40 to 80 % and, formed thereon, a coating catalyst layer (2) comprising a catalyst, an auxiliary catalyst and a supporting material. The catalyst-carrying filter exhibits a reduced pressure loss.

Catalyst-carrying filter

Carbon nanotube (CNT)-dispersed Si3N4 ceramics with electrical conductivity were developed based on the lower temperature densification technique, in which the key point is the addition of both TiO2 and AlN as well as Y2O3 and Al2O3 as sintering aids. This new ceramic with a small amount of CNTs exhibits very high electrical conductivity in addition to high strength and toughness. Since Si3N4 ceramics with Y2O3–Al2O3–TiO2–AlN were originally used as a wear material, electrically conductive Si3N4 ceramics are expected to be applied for high-performance static-electricity-free bearings for aerospace and other high-performance components.

Electrically Conductive CNT‐Dispersed Silicon Nitride Ceramics

An air filter arrangement, an air cleaner assembly including the air filter arrangement and methods of assembly and use are described. An air filter arrangement comprising a serviceable filter cartridge is described. The typical cartridge includes a recessed first flow face and an opposite outwardly projecting second flow face, with a central apex. Features of the cartridge, and an air cleaner for installation into the cartridge, are described.

Air filter arrangement; assembly and methods

The present invention relates to a method of manufacturing a metal-impregnated body in which a porous body is immersed under sub-atmospheric pressure in a molten alloy for impregnation with said alloy or a porous body is immersed under elevated pressures produced by various gases, the pressure then being reduced to normal level, after which the porous body is introduced together with a molten alloy into a metal mold, in which said molten alloy is impregnated into said porous body. The porous body is then separated from said molten alloy.

Method of manufacturing a metal-impregnated body

This invention relates to a catalyst assembly for cleaning an exhaust gas wherein the catalyst and the carrier therefor are secured inside a catalyst muffler by means of expandable ceramic material. This invention also provides a method for making such a catalyst assembly.

Catalyst assembly for cleaning an exhaust gas

A process for preparing hollow balls of silicon carbide, in which the surfaces of hollow balls of carbon are covered with particles of silicon or a silicon-containing composition, and the covered bodies are then heated at a temperature between 1100*C to 1200*C in a non-oxidizing atmosphere.

Process for preparing hollow balls of silicon carbide and product formed thereby

A high-temperature heat-insulating structure having a ceramic heat-insulating layer wherein foamable perlite particles and alumina are introduced into an Aqueous Solution of Monaaluminum Phosphate (Al2O3.3P2O5.6H2O) to form a paste, the resultant paste is used to fill the space between the walls of a double-walled structure, and is fired at a high temperature.

High-temperature heat-insulating structure

A fuel vapor collecting device comprising an activated carbon receiving chamber filled with activated carbon particles. Each of the activated carbon particles contains heat accumulating solid fillers which are uniformly distributed therein. The heat accumulating solid fillers are made of a metallic material having a specific heat which is larger than that of the activated carbon.

Fumiyoshi Noda

Papers

Method of manufacturing a metal-impregnated body

Catalyst assembly for cleaning an exhaust gas

Process for preparing hollow balls of silicon carbide and product formed thereby

High-temperature heat-insulating structure

Fuel vapor collecting device