Abstract: Resinoid and vitrified bonded abrasive products containing filament shaped sintered alumina based abrasive made up predominantly of fine alpha alumina crystals.

Abstract: A diamond element having good bonding properties and a method for fabricating the diamond element in which a diamond substrate is coated by and bonded to a first layer of chromium carbide, a second layer containing titanium is bonded to said first layer, and a third layer of tungsten, or molybdenum deposited by a CVD technique utilizing metal halides, is bonded to said second layer. The second layer functions to protect the chromium carbide layer against attack by halide containing gas during the CVD deposition of the tungsten, or molybdenum.

Abstract: A process for improving the strength of components manufactured from sialon comprising heating and components at a temperature of from about 750.degree. to 950.degree. C. for from about eight to thirty-six hours in an oxygen-containing atmosphere.

Abstract: Vitrified bonded grinding wheels which contain a mixture of sintered sol gel aluminous abrasive and silicon carbide abrasive are substantially and surprisingly better than those with either abrasive component alone, in their ability to abrade certain metals.

Abstract: An improved temperature stable synthetic polycrystalline diamond (PCD) product includes at least one temperature stable PCD integrally and chemically bonded to a matrix carrier support through a carbide forming layer which is of a thickness of at least about 1 micron, the layer on at least one surface of the PCD is in turn is bonded to the matrix carrier. A wide variety of shapes, sizes and configurations of such products is achieved through relatively low temperature and relatively low pressure processing. Various products of various geometries are described as well as the details of the processing to achieve chemical bonding of the PCD elements in a variety of support matrix carrier materials to form a unitary structure having a temperature stability up to about 1,200 degrees C.

Abstract: Abrasive article using sintered sol-gel abrasive particles mixed with other particles having greater friability, and carried in a bond.

Abstract: Coated abrasive products having abrasive filaments of polycrystalline alumina.

Abstract: Abrasive wheel using sol gel alumina particles and silicon carbide abrasive particles in a high elastic modulus bond containing an inorganic filler.

Abstract: A rotary drill bit for boring earth formations is provided which includes a main body portion of a hard metal matrix material and at least one protrusion or shoulder formed of the same matrix material. On the protrusion is mounted a cutting element. Means for reinforcing the protrusion are provided and extend between the main body portion of the bit and the protrusion. The reinforcements add impact strength to the bit and increase the resistance of the bit to cracking in areas supporting the cutting element.

Abstract: The invention relates to catalyst carries for use in conjunction with silver, alkali metal promoters, rhenium promoters and optionally rhenium co-promoters selected from sulfur, molybdenum, tungsten, chromium and mixtures thereof. The carriers consisting of at least 85 and preferably 95 percent by weight of alpha alumina, from about 0.01 to about 6 percent by weight of an alkaline earth metal silicate and from about zero to about 10 percent by weight (measured as the dioxide of added zirconium in the form of an oxide.

Abstract: Solids that are subject to a deleterious reaction with a dispersion medium in which they are suspended can be safely comminuted in that dispersion medium by providing therein a surfactant capable of reacting with the solid at a faster rate than the dispersion medium can so react to thereby suppress the deleterious reaction. In particular, unsintered silicon nitride or silicon carbide which when contacted with water would decompose to form silica on their surfaces can be milled in water, without producing excessive amounts of silica. The dispersions produced are sufficiently stable to be filtered through openings of 2 microns with loss of no more than 5% of the silicon nitride or carbide. Stable dispersions of solids in liquids can be coated with a different solid by surface precipitation under conditions which preclude the formation of a bulk precipitate.

Abstract: A superhard material-metal composite product comprises a plurality of metal coated superhard particles (diamond or cubic boron nitride), and a binder alloy forming a cementing matrix which binds the coated superhard particles into a coherent mass. The binder alloy has a melting point below about 1300.degree. C. and is capable of wetting the metal coating on the superhard particles. The superhard material-metal composite product is formed by assembling the coated particles and the binder alloy in a graphite mold, and then hot pressing at temperatures and pressures well below the temperatures and pressures of the diamond forming region. The superhard component comprises about 40% to 75% by volume of the composite product. The superhard material-metal composite product is of intermediate quality and is particularly useful in earth boring bits for drilling soft rock formations having abrasive rock stringers therein.

Abstract: Hollow bodies are sound insulated by placing partial dams inside of the hollow bodies and filling the bodies with a polymer composition. The partial dams facilitate more complete filling of the hollow bodies with the polymer composition which is fluid when injected into the bodies.

Abstract: A process for improving the strength of a sialon powder formed by a spray drying process is disclosed. The process involves the addition of small amounts of a hydrophilic silane to the slurry of inorganic powders and water which is fed to the spray dryer.

Abstract: A device and process is disclosed for producing filamentary abrasive particles having substantially equal aspect ratios without further length reduction.

Abstract: Abrasive articles are disclosed comprising at least about 10% by volume of a superabrasive, such as CBN, along with a sintered sol gel aluminous abrasive component.

Abstract: The present invention is an electrical device made up of a mixture of silicon carbide and molybdenum disilicide, and may include silicon nitride or aluminum nitride or boron nitride. An electrical device is also disclosed which is particularly suited for use as an igniter in liquid and gas fuel burning systems. The device is made up of a sintered, preferably hot-pressed, mixture of fine powders of aluminum nitride or silicon nitride, silicon carbide and molybdenum disilicide where, when all three are present, they are present in substantial quantities.

Abstract: A composite metal-ceramic article comprising a metal shaft and a ceramic ball bearing attached thereto. The shaft is tapered in such a manner to reduce the stress exerted on the ball.

Abstract: A novel process for rapid solidification of ceramic melts combines certain features of cooling by atomization and by contact with chilling surfaces. The material to be solidified is divided into fine liquid droplets that are propelled by a rapid flow of gas toward a rapidly moving chill surface, striking the surface with sufficient velocity to flatten each drop into a flat flake like shape. Apparatus for the process is also disclosed. The process is particularly applicable to making very fine grained, or even amorphous, ceramic materials that can be powdered and then sintered into strong, tough ceramic structures.

Abstract: A non-welded plate for supporting packing materials or limiting the upward movement of such packing materials in a packed column of a gas and liquid contacting apparatus is comprised of a plurality of first and second support beams. The first support beams have means for fastening to internal support members of the apparatus affixed thereon. The first and second support beams are essentially perpendicular to each other and are attached together by retaining means, such as a pin. Voids between the support beams may be covered with screen to provide further support or limitation.