摘要:
A method for providing a tantalum powder with a piece+block structure, comprising the following steps: 1) providing a granulous tantalum powder, and dividing same into a first part and a second part; 2) putting the first part of the tantalum powder in a ball mill for ball milling, taking the powder out after the ball milling and sieving same, and obtaining a tantalum powder in the form of a piece; 3) mixing the tantalum powder in the form of a piece and the second part of the tantalum powder to obtain a mixture, and preferably, the mixing proportion of the tantalum powder in the form of a piece and the granulous tantalum powder being 1:0.1˜1, preferably being 1:0.25˜0.8, and more preferably being 1:0.4˜0.6; and 4) performing the steps of water washing, acid washing, and nodularization on the mixture to finally obtain a tantalum powder with a piece+block structure.
摘要:
Provided is a friction material composition comprising: a binder; a fibrous base material; an abrasive material; an inorganic filler; and an organic filler, wherein the friction material composition further comprises: at least one selected from the group consisting of zinc, a cellulose fiber as the fibrous base materials and a flame retardant fiber as the fibrous base materials; an iron-based fiber as the fibrous base material in an specified amount; and an inorganic abrasive material having a Mohs hardness of 8 or higher and a particle size of 1 μm or larger as the abrasive material in an amount of 1 wt % or less. The present invention can provide a friction material composition which is less destructive to facing materials compared to conventional products, which has a high friction coefficient upon braking when used in repeated braking during high-speed traveling, and which is capable of suppressing pad wear and uneven pad wear, in the case that the friction material composition is formed into a brake pad for passenger cars. The present invention can also provide a friction material and a friction member using this friction material composition.
摘要:
The present disclosure relates to a method for the synthesis of at least one metallic nanotube (10). The method includes the steps of: growing at least one nanowhisker (6) on a substrate (2), the nanowhisker (6; 12) consisting of or having a coating of a first metal (12); coating said first metal (12) with a second metal (14) to form a coated nanowhiskers (8); and heat treating the at least one coated nanowhisker (8), to produce a metallic nanotube (10). Moreover, the present teaching relates to metallic nanotubes (10) grown by the method of the present teaching.
摘要:
A fiber composite material which is particularly suitable for aircraft construction, includes inorganic mineral fibers embedded or enclosed in a metal matrix. The mineral fibers include a substantial or dominant proportion of SiO2, and/or Al2O3 and/or Fe2O3, the remainder being rock material. The fibers have a length of at least 10 mm and are oriented in parallel to one another in at least one direction. The metal matrix is made of aluminum, aluminum alloys, magnesium, magnesium alloys, titanium or titanium alloys. These matrix metal alloys contain a substantial or dominant proportion of the respective metal. The fibers are preferably coated with particles of the matrix metal and bonded to one another to form fiber films or fiber sheets which are then laminated between sheets of matrix metal.
摘要翻译:特别适用于飞机结构的纤维复合材料包括嵌入或封闭在金属基体中的无机矿物纤维。 矿物纤维包括大部分或主要成分的SiO 2和/或Al 2 O 3和/或Fe 2 O 3,其余为岩石材料。 纤维具有至少10mm的长度并且在至少一个方向上彼此平行取向。 金属基体由铝,铝合金,镁,镁合金,钛或钛合金制成。 这些基体金属合金含有相当或主要的相应金属比例。 纤维优选地涂覆有基质金属的颗粒并彼此粘合以形成纤维膜或纤维片,然后层压在基质金属片之间。
摘要:
Coating for an offset paper comprising a catalyst for fixing polymerisable or crosslinkable constituents of the offset ink. The chemical drying time can be substantially reduced if such a catalyst system is added to the coating, wherein preferentially such a catalyst is a transition metal complex/salt, like Mn (2-ethylhexanoate, bpy).
摘要:
A silica nanofiber is derived from a crystalline polymer filament of a polymer including straight chain polyethyleneimine backbones, which is capable of forming a water-insoluble crystal in the presence of water molecules at room temperature, and the crystalline polymer filament in the silica concentrates metal ions, thereby realizing a composite nanofiber including metals or metal ions in the silica. Furthermore, the composite nanofiber of the present invention can be easily produced by fixing a polymer structure in the silica as the scaffold for metal ions and concentrating metal ions at the scaffold or reducing the metal ions. Furthermore, a metal-containing silica nanofiber can be easily obtained by removing a polymer component from the composite nanofiber, the composite nanofiber association, and the complex nanofiber structure. These nanofibers can be assembled and integrated, and the assembled or integrated association or structure can realize various shapes.
摘要:
A wear resistant coating for protecting surfaces undergoing sliding contact is disclosed. The wear resistant coating is applied by high velocity oxygen-fuel (HVOF) deposition of a powdered blend of the coating constituents. The powdered blend includes a nickel-chromium alloy, chromium carbide, and molybdenum. The disclosed coating should find use as a bearing surface on piston rings, cylinder liners, and other components of a power cylinder assembly of an internal combustion engine.
摘要:
An image processing apparatus, able to improve the pixel fill rate and able to prevent an increase of memory resources and increase of memory access, provided with a color calculation circuit for performing pixel level processing based on supplied first attribute parameters of the Z and color (R, G, B) data and outputting second attribute parameters and (x, y) coordinate data supplied by a DDA circuit together with the results and a sub primitive generation circuit for expanding a plurality of stamps to a plurality of sub primitives (sub stamps) based on the second attribute parameters of the color calculation circuit, generating expanded coordinates corresponding to the expanded sub stamps based on the (x, y) coordinate data of the DDA circuit, and outputting the same as the drawing parameters after expansion and the expanded graphics drawing coordinates to a memory controller, and a method of the same.