Abstract: Composite materials are in the form of particles, such as bits and short filaments, and combinations of such particles with matrix materials forming high strength, wear and corrosion resistant materials and may be shaped to define cutting tools, dies, mold components, electrodes, bearing components, finishing tools and the like. Structures include substrates and synthetic diamond particles encapsulated therein or bonded thereto have superior grinding, cutting and finishing characteristics. Particles are in the form of microbits, spheroids, single crystals, short narrow filaments and metal whiskers coated with synthetic diamond formed with a core of graphite, metal, metal compounds, metal alloys, ceramic, cermet, glass and composites thereof. Filaments and bits are coated with a lubricating film of wear resistant metal.

Abstract: A hair cosmetic composition comprising a polymer vesicle obtained from the polymerization of a surfactant monomer vesicle haing quaternary ammonium as a cation moiety and a polymerizable anion as a counter ion.

Abstract: Composite sintered Si.sub.3 N.sub.4 material particularly suitable as a cutting tool material for cutting cast iron is composed of:a sintered Si.sub.3 N.sub.4 substrate containing 0.1 to 10 weight % of Y.sub.2 O.sub.3, 0.1 to 10 weight % of ZrO.sub.2 and if necessary 1 to 15 weight % of at least one member selected from the group consisting of compound and solid solution thereof of elements of IVa (except Zr), Va and VIa of the Periodic Table and the balance being of Si.sub.3 N.sub.4 ;a first layer of Ti compound coated on the sintered Si.sub.3 N.sub.4 substrate;a second layer of Al.sub.2 O.sub.3 coated on the first layer; and the total thickness of the first and second layers being in the range of 1 to 20 microns.The above composite sintered Si.sub.3 N.sub.4 material has an improved abrasive resistance particularly in the case of cutting cast iron at high speed, while retaining the excellent physical properties of Si.sub.3 N.sub.4. Such a composite sintered Si.sub.3 N.sub.

Abstract: The present invention provides a ceramic composite having an open porous network and a controlled pore size comprising a plurality of ceramic particles having a fused glass coating and a method for producing the same. The ceramic particles are enveloped by and bonded to adjacent ceramic particles at their interfaces by the glass coating.