34 results about "Dense body" patented technology

A solid electrolyte structure (1) for all-solid-state batteries includes a plate-like dense body (2) formed of a ceramic that includes a solid electrolyte, and a porous layer (3) formed of a ceramic that includes a solid electrolyte that is the same as or different from the solid electrolyte of the dense body (2), the porous layer (3) being integrally formed on at least one surface of the dense body (2) by firing. The solid electrolyte structure can reduce the contact resistance at the interface between the solid electrolyte and an electrode.

The presently claimed invention relates to a method of making a PcBN cutting tool insert. The method includes the following steps: mixing raw material powders, (e.g., cBN, hBN, TiC, TiN, Ti(C,N), WC, W, C, Co, Co2Al9, Al AlN, Al2O3) with a liquid (e.g., ethanol) and an agent (e.g., polyethylene glycol, PEG) to form a homogeneous slurry with the desired composition; forming spherical powder agglomerates, typically 100 mum in diameter, preferably by spray drying; pressing said agglomerates to form a body of desired dimensions and density using conventional tool pressing technology; removing the agent from the powder at a suitable temperature and atmosphere; raising the temperature to 1000-1350° C. in vacuum; solid state sintering the body at 1000-1350° C. in vacuum, for 1-90 minutes to form a body with 35-55 vol % porosity; optionally, adding 0.5-1000 mbar of nitrogen to the sintering atmosphere at the hold time or during cooling; and HP/HT treating the porous body to form a dense body of desired shape and dimension.

A cutting tool made of surface-coated cubic boron nitride-based ultrahigh pressure sintered material, comprising a cutting insert main body formed by ultrahigh pressure sintering of compact composed of titanium nitride, aluminum and/or aluminum oxide, and boron nitride, and a hard coating layer vapor deposited on the main body. The main body has a texture containing cubic boron nitride, titanium nitride and reaction product. The hard coating layer has a lower layer of composite nitride having a composition of [Ti_1−XAl_X]N, where X is in a range from 0.40 to 0.60 in an atomic ratio, and the upper layer comprises a thin layer A having the composition of [Ti_1−XAl_X]N, where X is in a range from 0.40 to 0.60 in an atomic ratio, and a thin layer B consisting of a Ti nitride (TiN). The upper layer has a consisting of the thin layer A and a thin layer B layered alternately.

The invention discloses a preparation method of a graded porous nickel-titanium alloy, and belongs to the technical field of preparation of biomedical materials. The preparation method comprises the steps that Ni metal powder and Ti metal powder are weighed according to the composition proportion and then subjected to ball milling mechanical mixing; the mixed metal powder is divided into a plurality of parts, and the parts and an ammonium bicarbonate pore forming agent are weighed according to different porosity ratios and mixed; and after mixing, powder of different compositions is mechanically pressed into a graded block compact, the graded block compact is placed in a discharge plasma sintering furnace, after a system is vacuumized to 2 Pa to 6 Pa, sintering is carried out, the temperature rising rate ranges from 50 min/DEG C to 100 min/DEG C, heat preservation is carried out for 5 min to 10 min under the temperature ranging from 600 DEG C to 1000 DEG C, furnace cooling is carried out to achieve room temperature, and a graded porous nickel-titanium alloy medical material can be obtained. The part, in contact with the bone tissue, of the implanted material has high porosity and the large aperture, bone cells can be bonded to the surface of the material to grow, and biological locking is formed; and the inner structure is provided with a dense body high in strength and superelasticity, the material can be matched with the bone tissue, cooperative deformation is generated, the stress shielding effect is weakened, and the material can adapt to stress bearing conditions of bones on different portions. Thus, the biomedical graded porous nickel-titanium alloy material prepared through the method can be used as a good bone bearing orthopedic implant material.

The invention discloses a preparation method of a silver-magnesium-nickel alloy belt (slice) and wire. The preparation method comprises the following steps of by taking silver-magnesium alloy powder and nickel containing powder as raw materials, performing ball milling and mixing on the silver-magnesium alloy powder and the nickel containing powder, calcining a mixture in air, performing heating treatment on the calcined mixture at a reduction atmosphere, sintering power after treatment into a dense body, rolling the dense body into a belt (slice) or extruding the dense body into a wire, and then performing internal oxidation on the belt (slice) and the wire to prepare the silver-magnesium-nickel alloy belt (slice) and wire. Different from the traditional smelting and casting technology, for the preparation method provided by the invention, by uniformly mixing the silver-magnesium alloy powder and the nickel containing powder, distribution of a nickel in a silver substrate is controlled, and preparation of silver-magnesium-nickel alloy with controllable component distribution and microstructure is realized.

The invention relates to a powder sintering forming method for a cutting tool and a cutting body thereof, which comprises the following steps of: manufacturing a cutting body workpiece with the same shape as the cutting body of a drill, a micro drill or a spiral end mill; performing injection coating forming at the periphery and one end of the cutting body workpiece to obtain a thermoplastic plastic mold body; rotatably withdrawing a cutting body forming mold cavity of the plastic mold body from the other end of the cutting body workpiece; injecting cutter material powder and a mixed binder thereof into the cutting body forming mold cavity, and injecting metal powder and a mixed binder thereof into a handle body forming mold cavity of a forming mold to prepare a cutting body powder dense body connected with a handle body powder dense body; extracting, degreasing to separate the binder, and heating to remove the plastic mold body; and sintering the cutting body powder dense body and the handle body powder dense body at a high temperature to prepare the cutting tool integrating the cutter material powder sintering cutting body with the metal powder sintering handle body.

A method of producing a laminated body having a ceramic porous body having a thickness of 300 μm or larger and a ceramic dense body having a thickness of 25 μm or smaller. A green body for the porous body and a green body for the dense body are laminated to obtain a laminate, which is then subjected to pressure molding by cold isostatic pressing to obtain a pressure molded body. The pressure molded body is sintered to obtain a laminated sintered body. By reducing the leakage rate of helium gas of the laminated sintered body to 10⁻⁶ Pa˜m³/s or lower, the operational efficiency of the cell can be improved, and the deterioration of the cell can be prevented to improve an output after the cell is subjected to initiation and termination cycle tests of operation.

The invention relates to a medical implant with a compound structure. The medical implant is formed by compounding more than two medical implanted materials and is characterized in that various medical implanted materials have different biodegradation rates; the various medical implanted materials are embedded to each other and are in an interlaced compound structure to form a dense body; the medical implanted materials still keep respective biological properties and physical and mechanical properties; and each medical implanted material is a continuous structure body. The medical implant with the structure can provide multi-layered curative spaces for reparation of an implanting position and supply longer growth time for normal structures, that is, the implanting space gradually reserved by biodegradation of the medical implanted materials is in exchange of longer growth time for the normal structures, thereby being more suitable for the natural healing process of the implanting position of an impaired host.

The invention discloses a porous structure titanium implant suitable for dental implants. The porous structure titanium implant comprises an upper section, a middle section and a lower section. The upper section is a dense body, and the upper part of the outer layer of the upper section is provided with tapered threads inclined from the bottom to the inside; The lower part of the outer layer of the upper section is provided with a threaded tooth crest center concave to form a W-shaped sectional locking thread for increasing the initial stability of the implant. The inner core of the middle section is a dense body, the outer layer of the middle section is a communicating porous layer, and the porous layer provides a support for bone tissue growth and a bioactive coating. The lower section is a dense body, the outer layer of the lower section is provided with a self-tapping thread, and the end of the lower section is a flat end, and the end is provided with a cut with cutting function and intersects with the self-tapping thread. The invention effectively reduces the implantation difficulty, improves the implantation efficiency, the implantation success rate and the initial stabilityof the implantation.

In a fuel cell unit 16 that constitutes a fuel cell module 2 of an SOFC device 1, a collector cap 86a is connected to an inner electrode layer 90 via a seal material 96 as an Ag seal portion. A glass coating 30 (dense body) is filled up between the inner electrode layer 90 and an electrolyte layer 94 and the collector cap 86a to cover an upper end surface 96a of the seal material 96. As such, the fuel cell unit 16 includes the seal material 96 constituting as an Ag seal portion that separates a fuel gas from an oxidant gas, and a glass coating 30 at least partially formed to over at least either the fuel gas side surface of the seal material 96 or an the oxidant gas side surface of the seal material 96.

The invention discloses a method for preparing a four-axis carbon fiber robot shell. The method is characterized by comprising the steps of a, selecting a die; b, preheating the die; c, applying a release agent; d, conducting cladding to obtain a dense body; e, conducting die assembly for vulcanization; f, conducting cooling and die releasing; g, spraying an undercoat; and h, spraying a finishing coat. By the adoption of the method, operation is easy, industrial production is facilitated, and the produced robot shell has the advantages of being light, high in strength, high in fatigue resistance, high in chemical resistance and the like.

The invention discloses a preparation method of a chip oxygen sensor and the chip oxygen sensor prepared by the method. The preparation method comprises the following steps: preparing a ceramic substrate sintered into a dense body to serve as a support body; sequentially printing a first insulating layer and drying the printed first insulating layer at one side of the ceramic substrate through a thick film printing mode, printing a heating electrode and drying the printed heating electrode and printing a second insulating layer and drying the printed second insulating layer at the other side of the ceramic substrate or on the second insulating layer through the thick film printing mode; sequentially printing a third insulating layer and drying the printed third insulating layer, printing afirst porous platinum electrode and drying the printed first porous platinum electrode, printing a reference layer and drying the printed reference layer, printing a second porous platinum electrodeand drying the printed second porous platinum electrode and printing a porous protection layer and drying the printed porous protection layer; and sintering the printed ceramic substrate at high temperature so as to be molded. The chip oxygen sensor disclosed by the invention has no need of being thermally pressed and is simple in process, less in deformation and cracks and high in finished product yield.

A multilayer substrate that includes a first ceramic layer that is a dense body, a second ceramic layer that has open pores, and a resin layer adjacent the second ceramic layer, wherein a material of the resin layer is present in the open pores of the second ceramic layer.

The invention discloses a hot isostatic pressure preparation method of a high-density grained titanium alloy, so as to solve the problems that the titanium alloy prepared by the conventional powder metallurgic method at present is lower in density and coarser in microscopic structure. The method comprises steps of titanium alloy mixed powder preparation, cold isostatic pressure molding, dense body sintering, hot isostatic pressure densifying, demolding, and the like. The density of the prepared titanium alloy can be up to 100%; and the prepared titanium alloy is characterized by a fine grain size, an excellent mechanical property, and a high specific strength. The prepared titanium alloy is able to meet the requirements to a high-density and high-performance titanium alloy in the fields of aviation and aerospace. The hot isostatic pressure preparation method of the high-density grained titanium alloy is reasonable in design; the hot isostatic pressure preparation method of the high-density grained titanium alloy is able to solve the problems mentioned above; and the hot isostatic pressure preparation method of the high-density grained titanium alloy is of a great significance in preparing titanium alloys.

An inflatable building structure, which is an airtight closed body composed of an outer membrane and an inner membrane, on which an inflation and deflation valve is installed, and the cross section of the airtight body formed by the outer and inner membranes Thick, gradually thinning towards both ends to the shape of the inner and outer joints; outside the outer diaphragm and the inner diaphragm of the inflatable airtight body, there are respectively longitudinal or vertical and horizontal tensioned stay ropes; the present invention can withstand relatively large High pressure, large size, can be used in inflatable roofs, inflatable greenhouses, inflatable walls, inflatable bridges, inflatable tents, etc. of buildings. It is easy to assemble and disassemble, and easy to relocate in different places.

A method of reducing the oxygen content of a powder is provided. A canister is prepared with a getter, filled with the powder to be densified, sealed and evacuated. The canister is subjected to a hydrogen atmosphere at an elevated temperature whereby hydrogen diffuses into the canister through the walls thereof. The hydroge forms moisture when reacted with the oxygen of the powder and the moisture in the reacted with the getter in order to remove oxygen from the powder to the getter. The atmosphere outside the canister is then altered to an inert atmosphere or vacuum, whereby hydrogen diffuses out of the canister. A dense body having a controlled amount of oxygen can thereafter be produced by conventional powder metallurgy techniques.

The invention discloses a method for manufacturing fine-grained steel with pre-precipitated nanometer ceramic grains in continuously cast molten steel, and relates to a continuous casting method. The method includes mixing nanometer magnesia powder, iron powder and molybdenum powder in an agate grinding bowl according to a certain proportion to form mixed powder, filling the mixed powder in graphite dies and performing hot-press sintering on the mixed powder; unloading to-be-sintered bodies which are loads, cooling the to-be-sintered bodies until the temperatures of the to-be-sintered bodies reach the room temperature, and taking out the to-be-sintered bodies from the graphite dies for standby application; simultaneously starting alternating-current electromagnetic stirrers on continuous casting tundishes and crystallizers to electromagnetically stir the to-be-sintered bodies until the molten steel is completely solidified. The densities of the completely dense bodies which are sintered from the nanometer magnesia powder, the iron powder and the molybdenum powder according to the certain proportion are larger than the density (7.6 grams per cubic centimeter) of the molten steel. Nanometer magnesia ceramic grains and nanometer magnesia ceramic grain aggregates with sizes smaller than or equal to 2 micrometers are dispersed and distributed in the to-be-sintered bodies. The method for manufacturing the fine-grained steel with the pre-precipitated nanometer ceramic grains in the continuously cast molten steel has the advantage that the nanometer ceramic grains are dispersed and distributed in a crystal structure of the steel, so that purposes of refining a grain structure of the steel and improving the performance of the steel can be achieved.