摘要:
Sintered silicon nitride products comprising predominantly β-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toughness, resistance to recession, and resistance to oxidation at temperatures of at least 1500° C. Methods for preparing sintered silicon nitride products are also disclosed.
摘要:
Sintered silicon nitride products comprising predominantly β-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toughness, resistance to recession, and resistance to oxidation at temperatures of at least 1500° C. Methods for preparing sintered silicon nitride products are also disclosed.
摘要:
Compositions comprising at least one conductive nanomaterial and at least one rheology control additive are disclosed. These compositions can be used to form a film for uses requiring sufficient conductivity and light transparency. Methods of forming a conductive composition include: providing at least one conductive nanomaterial, providing at least one rheology control additive, and blending the at least one conductive nanomaterial and the at least one rheology control additive together to form the conductive composition. Methods of forming patterned transparent conductive coatings include: providing and applying a layer comprising at least one photosensitive or photoimageable composition to a surface, providing and applying a layer comprising at least one conductive nanomaterial and at least one rheology control additive, exposing and developing the layered material, and treating the layer comprising the at least one rheology control additive in order to remove at least part of the rheology control additive. Coating compositions, films, patterned films and structures containing these films and patterned films are also described.
摘要:
A ceramic ball bearing assembly (20) has raceway components generally held in residual compression by accompanying metal attachments. In a ceramic ball bearing assembly (20), an outer raceway (22) is formed that is held in compression by a circumscribing steel ring. The components may be fitted together with the ceramic raceway subject to thermal contraction while the steel ring is subject to thermal expansion. Upon mating, the ceramic raceway (22) slightly expands while the steel ring slightly contracts to impose residual compression upon the ceramic raceway. The residual compression preserves the ceramic raceway despite thermal or other stresses of operating environment. An inner ceramic raceway (24) is constructed by employing one of several of the herein described methods, and the ceramic ball bearing assembly of the present invention may use balls (26), needles, cylinders, or other rolling elements in order to achieve smooth angular translation between the inner and outer ceramic raceways.
摘要:
Transparent conductive materials, articles and films are described herein a) that are easily and efficiently produced, b) can be produced prior to application or in situ, c) are easily applied to surfaces and substrates or formed into articles, d) can be produced and used with materials and methods that are generally accepted by the flat panel display (FPD) industry, along with other industries that produce and utilize microelectronics, e) can be tailored to be photoimageable and patternable using accepted photolithography techniques, f) have superior optical properties and have superior film forming properties, including better adhesion to other adjacent layers, the ability to be laid down in very or ultra thin layers and the ability to remain transparent when laid down as thicker layers. Methods of producing and using these transparent conductive materials are also disclosed.
摘要:
In a fluid transfer device (10) that includes a housing (12), a rotor (16) rotatably mounted in the housing (12) and having a bore (24) and at least one piston (30) slidingly mounted in the bore (24), a port plate (42) that includes a body portion (44) mountable in the housing (12) and formed from a first material and a wear layer (56) formed of a second material, different from the first material, attached to the body portion (44) and adapted to contact the rotor (16). Also a fluid transfer device (10) including such a port plate (42).
摘要:
A ceramic ball bearing assembly has raceway components generally held in residual compression by accompanying metal attachments. In a ceramic ball bearing assembly, an outer raceway is formed that is held in compression by a circumscribing steel ring. The components may be fitted together with the ceramic raceway subject to thermal contraction while the steel ring is subject to thermal expansion. Upon mating, the ceramic raceway slightly expands while the steel ring slightly contracts to impose residual compression upon the ceramic raceway. The residual compression preserves the ceramic raceway despite thermal or other stresses of operating environment. An inner ceramic raceway is constructed by employing one of several of the herein described methods, and the ceramic ball bearing assembly of the present invention may use balls, needles, cylinders, or other rolling elements in order to achieve smooth angular translation between the inner and outer ceramic raceways.