Abstract: The disclosed apparatus relates to a gradient coil assembly for a magnetic resonance imaging system. The gradient coil assembly comprises: at least two coils. The coils comprise: at least one conductor mechanically bonded via a nonconducting substrate. The bonding surface of the at least one conductor has been subjected to a surface treatment to improve the mechanical bonding properties of the bonding surface. The disclosed apparatus also relates to a magnetic imaging system. The magnetic imaging system comprises: a system controller; a gradient amplifier unit in operable communication with the system controller; a magnetic assembly in operable communication with the gradient amplifier. The magnetic assembly comprises: a gradient coil assembly comprising at least two coils. The coils comprise: at least one conductor mechanically bonded via a nonconducting substrate.

Abstract: The disclosed apparatus relates to a gradient coil assembly for a magnetic resonance imaging system. The gradient coil assembly comprises: at least two coils. The coils comprise: at least one conductor mechanically bonded via a nonconducting substrate. The bonding surface of the at least one conductor has been subjected to a surface treatment to improve the mechanical bonding properties of the bonding surface. The disclosed apparatus also relates to a magnetic imaging system. The magnetic imaging system comprises: a system controller; a gradient amplifier unit in operable communication with the system controller; a magnetic assembly in operable communication with the gradient amplifier. The magnetic assembly comprises: a gradient coil assembly comprising at least two coils. The coils comprise: at least one conductor mechanically bonded via a nonconducting substrate.

Abstract: A method of forming a shimming body for a NMR assembly is provided. A magnetizable metal powder of known magnetic properties is provided. The powder is uniformly dispersed into a non-magnetic material to form a mixture having a selected uniform density. A selected weight of magnetic material is determined for a particular installation of an NMR assembly. The mixture is heated. A selected volume corresponding to the selected weight of magnetic material is extruded into a container. The mixture is cooled to form a shimming body.

Abstract: A method of forming a shimming body for a NMR assembly is provided. A magnetizable metal powder of known magnetic properties is provided. The powder is uniformly dispersed into a non-magnetic material to form a mixture having a selected uniform density. A selected weight of magnetic material is determined for a particular installation of an NMR assembly. The mixture is heated. A selected volume corresponding to the selected weight of magnetic material is extruded into a container. The mixture is cooled to form a shimming body.

Abstract: A method to provide large sheets of Nb.sub.3 Sn superconducting material suitable for use as a superconducting gradient shield in a magnetic resonance imaging system magnet by heating an anodized Nb-1 Zr sheet, tin dipping and reacting the sheet, and subsequently quenching the sheet in a purged atmosphere to provide an improved time constant and lowered Jc heating when used in a superconducting magnetic field.

Abstract: A superconducting magnet shield includes a plurality of overlapping NbTi sheets welded together with a plurality of welds extending along elongated parallel slots in the overlap region with the slots extending in the direction of superconducting current flow.

Abstract: A metal-clad laminate having special utility in the production of high resolution printed circuit patterns and preparation of the laminate are described. The laminate preferably comprises a resin-bonded, glass-reinforced substrate, a layer of coupling agent covering and bonded to a major surface of the substrate, a layer of ultra-thin copper adjacent the layer of coupling agent, and a composite bonding layer disposed between the copper layer and the layer of coupling agent. The composite bonding layer comprises copper alloyed with at least one non-copper metal and oxide material of the non-copper metal.

Abstract: A low temperature (about 0.degree. C. to about 100.degree. C.) method is disclosed for forming an ultrathin film of copper on an aluminum carrier sheet. By this method, which employs matte finish aluminum foil, the peel strength for separating the aluminum carrier from the copper film can be preset at a desired value between 0.1 and 2 pounds per inch.

Abstract: Adherent, thermal shock-resistant protective coatings for nickel base super alloys are obtained by applying to the base metal a thin bond coat of an alloy of chromium aluminum and yttrium with materials selected from the group consisting of iron, cobalt, nickel and nickel-cobalt and applying thereover a continuously graded mixture of this material with a zirconia-based ceramic, the concentration of zirconia-based ceramic increasing from the bond coat to the outer layer. The zirconia ceramic may be stabilized by the addition thereto of amounts of magnesium oxide or other materials.

Abstract: Adherent, thermal shock-resistant protective coatings for nickel base super alloys are obtained by applying to the base metal a thin bond coat of an alloy of chromium aluminum and yttrium with materials selected from the group consisting of iron, cobalt, nickel and nickel-cobalt and applying thereover a continuously graded mixture of this material with a zirconia-based ceramic, the concentration of zirconia-based ceramic increasing from the bond coat to the outer layer. The zirconia ceramic may be stabilized by the addition thereto of amounts of magnesium oxide or other materials.