General Dynamics Corporation

William Thomas Kaarlela

Henry J Weltman

William Sherman Margolis

John E Halkias

Jack D Reynolds

Mark T Carroll

Material and method for securely attaching boron filaments to other like filaments and to a substrate with preservation of the filament integrity for cutting and abrading by coating them with a mixture of matrix metals essentially containing copper, tin and titanium and joining the filaments by the matrix metals and/or to the substrate into an integral structure by liquid-phase-sintering of the matrix metals which grip and adhere the filaments in a strong, tough alloy with the integrity of the filaments essentially preserved. Boron filament-containing tools for cutting, grinding, abrading, or the like may be fabricated using the materials of the invention and the methods disclosed.

Material and method for securing boron filaments to each other and to a

A method for forming and preserving a permanent record of inspections of workpieces or the like having drilled holes or other metallic surface conformations characterized by applying a castable, plural component, magnetically active material comprised of room temperature vulcanizing, or polymerizing, rubber containing magnetizable particles and specific sensitizing agents; magnetizing the area to be inspected, so as to cause migration of the particles in the rubber before the viscosity becomes too high for the magnetized particles to migrate to the situs of an imperfection, or flaw; forming a magnetic rubber inspection replica or record of the alignment of the magnetizable particles adjacent the interface between the casting and the workpiece by increasing the viscosity of the rubber above 4000 centipoises and to flexible elastic form so as to immobilize the particles; removing the magnetic rubber inspection record thus formed and inspecting for concentrations of the magnetizable particles to delineate flaws; and carrying out post-inspection procedures. Also disclosed are specific formulations and ingredients thereof, including delineation of components that cure the problems of the prior art.

Castable magnetic particle flaw detection composition and method using

Method and material for fabricating composite structures and cutting tools containing super hard filaments using a modified brazing process that employs liquid phase sintering to alloy a mixture of metals about groups of the filaments in side by side parallelized arrangement to produce preforms or bundles of the filaments secured spaced apart in a strong tough metal matrix. A plurality of the completed bundles may then be bonded together by like method and materials into larger structures, tools or cutting portions thereof.

Alloy and structures made therefrom

Material and method for securely attaching boron filaments to other like filaments and to a substrate with preservation of the filament integrity for cutting and abrading by coating them with a mixture of matrix metals essentially containing copper, tin and titanium and joining the filaments by the matrix metals and/or to the substrate into an integral structure by liquid-phase-sintering of the matrix metals which grip and adhere the filaments in a strong, tough alloy with the integrity of the filaments essentially preserved. Boron-filament-containing tools for cutting, grinding, abrading, or the like may be fabricated using the materials of the invention and the methods disclosed.

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Fort Worth, TX, United States of America

William Thomas Kaarlela