摘要:
There is disclosed an Al.sub.2 O.sub.3 based ceramic which includes 5% to 50% by weight of a hard dispersed phase of at least one compound selected from metal carbide, metal nitride, metal carbonitride, metal oxy-carbide, metal oxy-nitride and metal carbo-oxy-nitride. The compound is represented by M(CNO), wherein M is at least one metal selected from the group consisting of Ti, Zr and Hf. The ceramic optionally contains 1% to 25% by weight of ZrO.sub.2, and balance Al.sub.2 O.sub.3 matrix, which contains an additive dissolved in the Al.sub.2 O.sub.3 grains so as to form solid solution therewith. The additive is contained in an amount of 0.01% to 12% by weight with respect to the Al.sub.2 O.sub.3 matrix and is at least one oxide of an element selected from the group consisting of Y, Mg, Cr, Ni, Co, and rare earth elements. The Al.sub.2 O.sub.3 grains have an average grain size no larger than 1.0 .mu. m while the hard phase constituent has an average grain size no larger than 0.6 .mu. m.
摘要翻译:公开了一种Al 2 O 3系陶瓷,其包含5重量%至50重量%的硬分散相的至少一种选自金属碳化物,金属氮化物,金属碳氮化物,金属氧化碳,金属氮化物和金属碳氮化物的化合物, 氧氮化物。 该化合物由M(CNO)表示,其中M是选自Ti,Zr和Hf中的至少一种金属。 陶瓷任选含有1重量%至25重量%的ZrO 2,并且余量为Al 2 O 3基质,其含有溶解在Al 2 O 3颗粒中的添加剂以便与其形成固溶体。 相对于Al 2 O 3基质,添加剂的含量为0.01〜12重量%,是选自Y,Mg,Cr,Ni,Co和稀土元素中的至少一种元素的氧化物 。 Al 2 O 3粒子的平均粒径不大于1.0(my)m,而硬相成分的平均粒径不大于0.6(my)m。
摘要:
There is disclosed an Al.sub.2 O.sub.3 based ceramic which includes 5% to 50% by weight of a hard dispersed phase of at least one compound selected from metal carbide, metal nitride, metal carbonitride, metal oxy-carbide, metal oxy-nitride and metal carbo-oxy-nitride. The compound is represented by M(CNO), wherein M is at least one metal selected from the group consisting of Ti, Zr and Hf. The ceramic contains no greater than 25% by weight of ZrO.sub.2, and balance Al.sub.2 O.sub.3 matrix. which contains an additive dissolved in the Al.sub.2 O.sub.3 grains so as to form solid solution therewith. The additive is contained in an amount of 0.01% to 12% by weight with respect to the Al.sub.2 O.sub.3 matrix and is at least one oxide of an element selected from the group consisting of Y, Mg, Cr, Ni, Co, and rare earth elements. The Al.sub.2 O.sub.3 grains have an average grain size no larger than 1.0 .mu.m while the hard phase constituent has an average grain size no larger than 0.6 .mu.m.
摘要:
There is disclosed a silicon nitride based sintered material which contains 0.1% to 20% by volume of zirconium oxide, 0.1% to 14% by volume of zirconium nitride, 3% to 15% by volume of a binder phase of an Mg-Si-O-N or Mg-Si-Zr-O-N system, and balance .beta.-silicon nitride. The sintered material may include an oxide layer of an average thickness of 10 to 1,000 .mu.m in a surface thereof and having a zirconium oxide concentration increasing toward the surface thereof. A process specifically adapted to manufacture the above sintered material is also disclosed.
摘要:
A regenerative control system of a vehicle is constructed such that in a system which generates electrical energy of a low voltage suitable for a low voltage system circuit and electrical energy of a high voltage suitable for the high voltage system circuit in an alternate manner by making use of kinetic energy of a vehicle when the vehicle is in a deceleration running state, a ratio between a period of time to generate the low voltage electrical energy and a period of time to generate the high voltage electrical energy is decided in accordance with a deceleration required of the vehicle, and a power generation voltage is duty controlled according to the ratio thus decided.
摘要:
A lens barrel according to an embodiment of the present invention includes a fixed barrel, a movable member that is movable relative to the fixed barrel, a flexible circuit board that is bent in a U-shape and hangs between the fixed barrel and the movable member, and a flexible circuit board guide. The flexible circuit board guide secures one side of the flexible circuit board that is continuous with the bent portion of the flexible circuit board to the fixed barrel while the one side of the flexible circuit board extends in a moving direction of the movable member.
摘要:
According to an internal combustion engine fuel injection control apparatus and control method, when an operating region of the engine shifts from a fuel cut region in which no fuel is injected to a low load region in which a small amount of fuel is injected, or visa versa, at least one pilot injection is executed ahead of a main injection in the low load region, and the number of pilot injections is determined according to the engine coolant temperature. This injection control makes it possible to ensure drivability while suppressing the amount of HC produced.
摘要:
A reduction gear including: a worm wheel, the tooth skin portion of which is at least made of macromolecular composite material, and a worm for meshing with the worm wheel concerned, wherein a tooth surface of the worm has been heat-treated by high-frequency induction hardening.
摘要:
A metallic sliding material including at least a support member with a sliding surface and an inorganic compound coating layer formed on the sliding surface is disclosed. The sliding surface is formed from an aluminum alloy or a reinforcing material-containing aluminum alloy. The inorganic compound coating layer is formed from at least one aluminum compound, and at least one phosphorus compound, and at least one member selected from the group of molybdenum compounds, tungsten compounds, and chromium compounds. These compounds are present in such concentrations that molybdenum, tungsten, and chromium collectively constitute 2 to 48% by weight of the inorganic compound coating layer, aluminum constitutes 1 to 25% by weight of the inorganic compound coating layer, phosphorus constitutes 1 to 25% by weight of the inorganic compound coating layer, and the balance of the inorganic compound coating layer is oxygen and impurities.
摘要:
A compressor equipped with a compressing unit comprising a compressing section and a motor section which are connected to each other and Which are encased in a closed vessel, the compressing section including a crank shaft rotatable so that a piston reciprocates within a cylinder and the motor section comprising a rotor and stator and disposed at a lower side of the compressing section, the rotor being connected to the crank shaft so that the crank shaft is rotatable in response to driving of the motor section. Springs are provided between the compressing unit and the closed vessel so as to elastically support the compressing section and the motor section, and first and second balance weights are respectively provided on upper and lower portions of a rotor of the motor section. The first and second balance weights are determined on the basis of the resultant load to be applied to an eccentric portion of the crank shaft, a con'rod and the piston, the loads of the first and second balance weights and distances among the first and second balance weights and the eccentric portion of the crank shaft.