Abstract: A multilayer abrading tool is produced by first providing a tool substrate with an irregular abrading surface. The irregular surface is covered with metal balls which are brazed thereto to form a structured surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool is then heated to drive off the binder and to cause infiltration of the infiltrant in the abrasive grit to form a multilayer of diamond grit suspended in a braze matrix which is attached to the structured surface of the tool substrate.

Abstract: A sintered silicon nitride-silicon carbide composite material is provided comprising a matrix phase of silicon nitride and silicon carbide where silicon carbide grains having an average diameter of not more than 1 .mu.m are present at grain boundaries of silicon nitride grains and silicon carbide grains having a diameter of several nanometers to several hundred nanometers, typically not more than about 0.5 micrometers, are dispersed within the silicon nitride grains and a dispersion phase where (a) silicon carbide grains having an average diameter of 2 to 50 .mu.m and/or (b) silicon carbide whiskers having a short axis of 0.05 to 10 .mu.m and an aspect ratio of 5 to 300 are dispersed in the matrix phase. A process for the production of the composite material is also provided.

Abstract: The present invention relates to a matrix glass composition for glass doped with dispersed CdS.sub.x Se.sub.y Te.sub.z (x+y+z=1) microcrystallites, which contains P.sub.2 O.sub.5 and/or B.sub.2 O.sub.3, and ZnO and/or CdO as essential constituent components, in which the total amount of P.sub.2 O.sub.5 and B.sub.2 O.sub.3 is in a range of from 35 to 65 mol %, and the total amount of ZnO and CdO is in a range of from 65 to 25 mol %. The present invention relates also to glass doped with dispersed microcrystallites which comprises a matrix glass composition as defined above as matrix glass, and CdS.sub.x Se.sub.y Te.sub.z (x+y+z=1) microcrystallites precipitated in the matrix glass.

Abstract: A water and oil repellent composition containing, as an essential component, non-film-forming fine solid particles having a low surface tension and having a fluorine content of at least 30% by weight.

Abstract: A ceramic raw material mixture with improved processing properties comprising at least two chemically different raw material components, wherein at least two of the raw material components have the same type of cation on the surface thereof, at least one of the raw material components being coated with said type of cation and the coating, calculated as cation oxide, amounting to 0.01 to 6% by weight, based on the coated component, and all the raw material components having a surface with an isoelectric point of .ltoreq.pH 7.

Abstract: Vitreous ceramic composition belonging to the SiO.sub.2 -Al.sub.2 O.sub.3 -LiO.sub.2 -TiO.sub.2 system in which the components are selected in ranges of definite percentages with the addition of elements exercising a given nucleating effect of promotion of growth of polycrystalline phases and designed to be used as a coating composition to be deposited directly in dry granular form on incandescent supports for producing ceramic with high crystallization speed.

Abstract: Production of composite ceramic articles by infiltration of a particulate, permeable bed or permeable preform with a polycrystalline matrix produced as a metal-oxidant reaction product, wherein the bed or preform is comprised of dross.

Abstract: A microwave dielectric ceramic composition containing as main components substances expressed by a composition formula of x.multidot.TiO.sub.2 -y.multidot.ZrO.sub.2 -z.multidot.SnO.sub.2 (where 0.30.ltoreq.x.ltoreq.0.60, 0.25.ltoreq.y.ltoreq.0.60, and 0.025.ltoreq.z.ltoreq.0.20) when their molar fractions are taken as x, y and z (x+y+z=1), and containing as additives predetermined amounts of one type selected from the group consisting of MnO, Al.sub.2 O.sub.3, CuO, Li.sub.2 O and Ga.sub.2 O.sub.3 and predetermined amounts of one type selected from the group consisting of Nb.sub.2 O.sub.5 and Ta.sub.2 O.sub.5.

Abstract: An aqueous permanent coloring composition for a marking instrument includes a pigment, an alkali soluble acrylic resin, and a volatile pH regulant. The composition optionally includes a drying agent, an adhesion promoter, and/or a preservative. The composition is useful as a permanent ink or paint and has good fugitivity from skin.

Abstract: A method of manufacture of a durable abrasive sheet which includes a perforated metal sheet of woven metal mesh or the like having abrasive grit brazedly attached, imbedded in a backing substrate. The method includes the steps of coating a perforated metal substrate with a mixture of an infiltrant and a temporary binder and applying a layer of abrasive grit particles thereto. Thereafter, this product is heated to drive off the binder and attach the grit particles to the perforated metal substrate. The metal substrate having the grit particles attached is then imbedded in a backing substrate such that the portion of the perforated metal substrate having the grit particles attached are at the surface of the backing substrate. In order to provide a cutting type abrasive sheet material the particles are magnetically aligned on the perforated metal substrate and brazed in position. Thereafter, a deformable substrate sheet is placed contiguous with the perforated metal substrate.

Abstract: Ceramic matrix composite articles comprising a matrix phase composed of a silicate glass or glass-ceramic and a matrix reinforcement material disposed within the matrix comprising carbon (e.g., graphite) fibers are described, wherein the fibers are provided with a protective boron nitride surface coating. The mechanical properties of the composites at high temperatures are substantially improved.

Abstract: An aqueous plastic composition of an inorganic powder which per se has substantially no plasticity which comprises: the inorganic powder and a polysaccharide of natural origin.The molding and sintering of the plastic composition provide a sintered body of high mechanical strength and dimensional accuracy.

Abstract: Vitrified bonded abrasive bodies prepared from sol gel sintered aluminous grit particles and a vitreous (glass) bond exhibit improved abrasive performance by treating the surfaces of the grit particles so as to give them silica-enriched surfaces.

Abstract: An electrically conductive powder is provided which comprises particles of zinc sulfide coated with an elecctrically conductive coating of copper sulfide wherein the zinc sulfide particles have a BET surface area of 2 to 10 m.sup.2 /g and a purity of at least 97%, and is particularly useful to impart antistatic properties to plastics, synthetic fibers, laminated papers and the like.

Abstract: Ceramic matrix composite articles of improved high temperature oxidation resistance are provided, the articles comprising reinforcing fibers disposed within a ceramic matrix, the matrix further comprising a minor matrix addition consisting of a dispersion of fluormica crystallites in a proportion effective to improve the oxidation resistance of the article and ranging up to about 20% by weight of the matrix.

Abstract: A paper coating composition which comprises:(I) a pigment,(II) an aqueous binder, and(II) a resinous ingredient comprising (A) a water-soluble resin which is prepared by cross-linking (a) a condensation product of (al) an alkylenediamine or a polyalkylenepolyamine and (a2) an urea compound with (b) a cross-linking compound. This composition imparts excellent ink receptivity, excellent water resistance, and in particular, excellent anti-blister property to paper.

Abstract: An ink that includes a recording agent and a liquid medium capable of dissolving or dispersing the recording agent. The ink contains a compound represented by the following Formula (I):R.sub.1 --CONH--R.sub.2 (I)wherein R.sub.1 represents an alkyl group or aryl group unsubstituted or substituted with a group selected from a hydroxyl group, a carboxyl group, a sulfone group, an amino group and an acetylamino group; and R.sub.2 represents a hydrogen atom, an amide group, an aminoalkyl group, an aliphatic carboxylic acid residual group, or an aryl group unsubstituted or substituted with a group selected from a hydroxyl group, a carboxyl group, a sulfone group, an amino group and an acetylamino group; provided that R.sub.1 represents the unsubstituted or substituted aryl group when R.sub.2 is a hydrogen atom. The ink is suitably used in ink-jet recording.

Abstract: Piezoresistive material, useful as a sensing agent for mechanical deformation undergone by pieces or structures when they support loads during their normal operation, consists essentially of a substantially homogeneous solid mixture of three or more components, including a piezoresistive element, a conducting element and a binding element. Said piezoresistive material is also useful for manufacturing various transducers, the function of which is based on elastic deformation.

Abstract: A process for using nitride-containing aluminum dross residues to produce refractory products. The process involves mixing a dross residue which contains AlN, without prior conversion of the aluminum nitride in the dross to aluminum oxide or hydroxide, with a material comprising a metal oxide or a metal oxide precursor, and calcining the resulting mixture at a temperature suitable to produce a refractory product. During the calcination step, the AlN reacts with other components of the mixture. Since the reaction is exothermic, less heat is required for the calcination step than if a dross residue containing no AlN were used. The AlN can also reduce various contaminants (e.g. Fe.sub.2 O.sub.3, silicon and titanium) present in the metal oxide refractories, and so the invention can be used to produce conventional refractory products of improved purity and appearance. The process enables dross residues to be used for useful purposes rather than being discarded.

Abstract: An improved anticorrosion coating composition is disclosed. The composition is characterized in that in the known anticorrosion coating composition comprising a chromic acid compound or a chromic acid compound and a boric acid compound, a powder of zinc, aluminum of an alloy of a mixture thereof, a (poly)glycol compound and solvent, a part of chromic acid compound ingredient is replaced by a water-soluble nickel and/or cobalt compound. The composition exhibits a better corrosion protection performance in more severe corrosion environment than the known anticorrosion coating composition with lesser content of harmful hexavalent chromium.