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Sic whisker composite ceramic cutting tools
PatentsALERT
fitting a face into a head body, the specific gravity of said face is smaller than that of a head body, which is provided with a window-like hole, and/or a back crust therein, whereby golf clubheads with ultra wide sweet area can be obtained.
APPLICATIONS
5402004 HEAT TRANSFER MODULE FOR ULTRA HIGH DENSITY AND SILICON ON SILICON PACKAGING APPLICATIONS Gzmat Burha Dallas, TX, UNITED Assigned to Texas Instruments Incorporated
STATES
A system for dissipating heat from semiconductor chips disposed on a substrate which may individually produce differing amounts of heat, the substrate secured to a device uniformly distributing the heat produced by the chips thereover in the form of a metal matrix composite of a thermally conductive material, preferably aluminum or copper, having layers of uniformly spaced fibers, preferably carbon, with a higher thermal conductivity than the metal of the metal matrix and embedded therein. Each layer has a plurality of such fibers in rows, each layer being orthogonal to the layers thereabove and therebelow. Preferably, none of the carbon fibers touch each other. The metal matrix is secured to a heat dissipating structure in the form of a housing having a sponge secured therein. The sponge is preferably of aluminum or copper and has a cellular structure, the cells having interconnecting porosity. The housing contains a fluid inlet and outlet whereby fluid travels through the sponge and withdraws heat from the walls of the sponge cells. In an alternative embodiment, the housing is secured to the metal matrix by means of an aluminum-silicon alloy braze layer which is brazed therebetween. Also, the metal matrix can be coated with a layer of pure aluminum to avoid or minimize corrosion. The sponge can be spaced from the housing walls containing the inlet and outlet to permit inlet fluid to travel through the sponge relatively uniformly throughout its entire volume rather than mainly in the direct path between inlet and outlet.
5439223 GOLF CLUB HEAD Kobayashi Kenji
Tsubame shi, Niigata ken, JAPAN
In order to enlarge a sweet area on a ball hitting surface of a golf clubhead, composite structures of two different specific gravities are utilized in addition to structural devices for fixing composite parts. The center of gravity of a golf clubhead is capable of being further distant from a face by utilizing said composite structures, for example, a balance weight fitted into a head body, a face fitted into a head body, a windowlike hole provided in a head body etc. In the case of
5439750 TITANIUM METAL MATRIX COMPOSITE INSERTS FOR STIFFENING TURBINE ENGINE COMPONENTS Ravenhall Richar; Wojciechowski Charles R; Mitchell Stephen C; Mercer Gary D; Kelly Thomas; Schobert Melvin A; Maclin Harvey Cincinnati, OH, UNITED STATES Assigned to General Electric Company A cast article having a reinforced structural composite core is disclosed. The cast article includes a structural element which is embedded in the otherwise cast metal article. The structural element is comprised of a metal matrix composite structural core. It includes a plurality of reinforcing fibers within a metal matrix. The fibers are generally a non-metallic material such as a ceramic which degrade at a temperature below the melting temperature of the cast metal comprising the article. The metal matrix composite structural core is encased with a sheath. The sheath, attached to and completely surrounding the core, is made of the same metal as the cast metal article. In a preferred embodiment, the article is a titanium alloy strut for a gas turbine engine.
5439854 TIC-BASE/SIC WHISKER COMPOSITE CERAMIC CUTTING TOOLS Suzuki Junichir; Sakakibara Shoj; Okuno Akiyasu; Watanabe Masakazu Nagoya, JAPAN Assigned to NGK Spark Plug Co Ltd A ceramic cutting tool formed of a Tic-based sintered body contains 40 wt % or more of TIC, and 5 to 40 wt % of Sic whisker uniformly dispersed in the sintered body. The Sic whisker has a diameter of 0.2-1.5~ and a length of 1-20~. The sintered body may contain up to 40 wt % of A1203, and further sintering aids. Up to 40% by weight of the TiC may be substituted with at least one of Ti, nitrides, oxides and borides of Ti, and solid-solutions of these nitrides, oxides and borides of Ti to form a Tic-base composition. The TiC base composition may be represented by the formula (TiaMb) (CcNdOeBf)g, in which M denotes at least one transition metal element of Groups IVa, Va and Via according to the International Periodic Table, except Ti; and a+b=l, O
COMPOSITES
PART A Volume 27 Number 1 1995
85
fitting a face into a head body, the specific gravity of said face is smaller than that of a head body, which is provided with a window-like hole, and/or a back crust therein, whereby golf clubheads with ultra wide sweet area can be obtained.
APPLICATIONS
5402004 HEAT TRANSFER MODULE FOR ULTRA HIGH DENSITY AND SILICON ON SILICON PACKAGING APPLICATIONS Gzmat Burha Dallas, TX, UNITED Assigned to Texas Instruments Incorporated
STATES
A system for dissipating heat from semiconductor chips disposed on a substrate which may individually produce differing amounts of heat, the substrate secured to a device uniformly distributing the heat produced by the chips thereover in the form of a metal matrix composite of a thermally conductive material, preferably aluminum or copper, having layers of uniformly spaced fibers, preferably carbon, with a higher thermal conductivity than the metal of the metal matrix and embedded therein. Each layer has a plurality of such fibers in rows, each layer being orthogonal to the layers thereabove and therebelow. Preferably, none of the carbon fibers touch each other. The metal matrix is secured to a heat dissipating structure in the form of a housing having a sponge secured therein. The sponge is preferably of aluminum or copper and has a cellular structure, the cells having interconnecting porosity. The housing contains a fluid inlet and outlet whereby fluid travels through the sponge and withdraws heat from the walls of the sponge cells. In an alternative embodiment, the housing is secured to the metal matrix by means of an aluminum-silicon alloy braze layer which is brazed therebetween. Also, the metal matrix can be coated with a layer of pure aluminum to avoid or minimize corrosion. The sponge can be spaced from the housing walls containing the inlet and outlet to permit inlet fluid to travel through the sponge relatively uniformly throughout its entire volume rather than mainly in the direct path between inlet and outlet.
5439223 GOLF CLUB HEAD Kobayashi Kenji
Tsubame shi, Niigata ken, JAPAN
In order to enlarge a sweet area on a ball hitting surface of a golf clubhead, composite structures of two different specific gravities are utilized in addition to structural devices for fixing composite parts. The center of gravity of a golf clubhead is capable of being further distant from a face by utilizing said composite structures, for example, a balance weight fitted into a head body, a face fitted into a head body, a windowlike hole provided in a head body etc. In the case of
5439750 TITANIUM METAL MATRIX COMPOSITE INSERTS FOR STIFFENING TURBINE ENGINE COMPONENTS Ravenhall Richar; Wojciechowski Charles R; Mitchell Stephen C; Mercer Gary D; Kelly Thomas; Schobert Melvin A; Maclin Harvey Cincinnati, OH, UNITED STATES Assigned to General Electric Company A cast article having a reinforced structural composite core is disclosed. The cast article includes a structural element which is embedded in the otherwise cast metal article. The structural element is comprised of a metal matrix composite structural core. It includes a plurality of reinforcing fibers within a metal matrix. The fibers are generally a non-metallic material such as a ceramic which degrade at a temperature below the melting temperature of the cast metal comprising the article. The metal matrix composite structural core is encased with a sheath. The sheath, attached to and completely surrounding the core, is made of the same metal as the cast metal article. In a preferred embodiment, the article is a titanium alloy strut for a gas turbine engine.
5439854 TIC-BASE/SIC WHISKER COMPOSITE CERAMIC CUTTING TOOLS Suzuki Junichir; Sakakibara Shoj; Okuno Akiyasu; Watanabe Masakazu Nagoya, JAPAN Assigned to NGK Spark Plug Co Ltd A ceramic cutting tool formed of a Tic-based sintered body contains 40 wt % or more of TIC, and 5 to 40 wt % of Sic whisker uniformly dispersed in the sintered body. The Sic whisker has a diameter of 0.2-1.5~ and a length of 1-20~. The sintered body may contain up to 40 wt % of A1203, and further sintering aids. Up to 40% by weight of the TiC may be substituted with at least one of Ti, nitrides, oxides and borides of Ti, and solid-solutions of these nitrides, oxides and borides of Ti to form a Tic-base composition. The TiC base composition may be represented by the formula (TiaMb) (CcNdOeBf)g, in which M denotes at least one transition metal element of Groups IVa, Va and Via according to the International Periodic Table, except Ti; and a+b=l, O
COMPOSITES
PART A Volume 27 Number 1 1995
85