47 results about "Matrix bound" patented technology

Bonded abrasive articles are described wherein a metal boride modified, lead-free vitreous matrix binds abrasive grains, such abrasive articles demonstrate improved performance over vitreous bonded abrasive articles with known vitreous matrices. Vitreous bond precursor materials are described including admixtures comprising lead-free vitreous precursor material and powder of metal boride(s), and admixtures comprising metal boride modified, lead-free vitreous particles. Methods are described for producing vitreous bonded abrasive articles having abrasive grains bound by metal boride modified, lead-free vitreous matrices.

The invention relates to a chemical catalyst preparation technology, and aims to provide a catalyst for low-temperature catalytic combustion of volatile aromatic hydrocarbons and a preparation method thereof. The catalyst is based on cordierite honeycomb ceramics, and the surface of the base body is sequentially provided with an aluminum coating, an additive coating and an active component layer from the inside to the outside; based on the total amount of the catalyst, the catalyst contains 85-90 wt% of the cordierite honeycomb ceramics, 8-12 wt% of the aluminum coating, 1-5 wt% of the auxiliary coating, and 0.05-0.5 wt% of the active component layer; wherein, the composition of the aluminum coating is alumina; the composition of the auxiliary coating is a rare earth metal oxide; The constituents of the active component layer are noble metals. The preparation process of the invention is simple, the preparation raw materials are easy to obtain, the specific surface area is large, the cost is low, and the catalytic combustion reaction of benzene series such as toluene has high catalytic activity; the active component has strong binding force with the matrix, and is not easy to fall off and crack It can still maintain high activity under high space velocity airflow and thermal shock.

The invention discloses a TiCN series nanometer gradient compound multi-layer coating and a method for preparing the same. On hard-metal alloy, iron based tools with the Rockwell hardness of over HRC60 or a mould matrix, a TiN film, a gradient change Ti(CxN1-x) film and a TiCN film are coated in sequence to form the nanometer gradient compound multi-layer coating with a structure of TiN/Ti(CxN1-x)/Ti(CN), wherein the x is between 0 and 0.5. The method for preparing the coating comprises the steps of surface pre-treatment, pre-heating, surface washing and etching, preparation of a transition layer, preparation of a gradient layer, preparation of a surface layer and the like. The hardness HV of the coating prepared by the method reaches 28 to 32GPa, and the same matrix binding force of the coating is over 55N, the same matrix binding force and wear resistance of the TiCN series coating are improved, and the working efficiency and the service life of the tools and the mould are also improved.

This invention discloses a diamond film containing Cr and its preparation method. Said film is a H-free film containing Cr deposited in gas phase on a matrix surface having the alternative condensed multi-layer gradient structure of Cr, CrNx, CryCz, Cr, CrNx, CryCz layers orderly from inside to outside along the vertical direction of the matrix surface, the film thickness is not less than 2 mum, which has a fine film/matrix binding force and good wearability. The preparation method includes utilizing the magnet control sputtering system to coat, the magnet control targets are a pair of unbalanced magnet controlled Cr targets and 1-4 pairs of un-balanced magnet controlled C targets, the supply of which is 20-250KHz IF AC supply, a pulse matrix negative bias voltage is applied on the armed coating matrix by single-level pulse DC supply, the sputtering gas is Ar.

A freestanding, microporous polymer sheet (52, 56) is composed of a polymer matrix binding an electrically conductive matrix. The polymer matrix preferably includes UHMWPE, and the electrically conductive matrix is preferably in powder form. The UHMWPE is of a molecular weight that provides sufficient molecular chain entanglement to form a sheet with freestanding characteristics. Multiple microporous sheets (30) can be wound or stacked in a package filled with an electrolyte to function as electrodes in an energy storage device (86), such as a battery. Metallic layers (81, 83) can be applied to the microporous sheets to function as current collectors in such devices.

A flexible microporous polymer sheet having first and second opposite major surfaces comprises a polymer matrix binding a filler component that exhibits high oil absorption capacity in its initial state before the start of material processing. The polymer matrix includes a polyolefin component and has three-dimensional interconnecting and interpenetrating pore and polymer networks through which the bound filler component is distributed from the first major surface to the second major surface. The polyolefin and filler components are included in amounts that result in a microporous polymer sheet having between about 75% and about 90% porosity and containing less than about 10 wt. % polyolefin component. Preferred polyolefin and filler components include ultrahigh molecular weight polyethylene and high oil absorption precipitated silica, respectively.

The invention discloses a preparation method of a metal doped hydrogen-free diamond-like carbon film which. The method is characterized in that an ion beam assisted deposition technology is utilized to prepare a metal doped hydrogen-free diamond-like film on a workpiece and a metal target and a graphite target are used for carrying out double-target sputtering. The preparation method comprises the following specific steps of: cleaning and activating ions on the surface of the workpiece and depositing to prepare the metal doped hydrogen-free diamond-like film. The prepared metal doped hydrogen-free diamond-like film has relatively higher film hardness, film-matrix binding force, elastic modulus, abrasion resistance, thermal stability and other performances. The preparation method is strong in technological operability and good in repeatability and can be applied to the surface treatment of silicon and various metal workpieces.

The invention provides a method for extracting pole characteristics of a complicated target, which comprises the following steps of: obtaining accurate target later period response according to frequency domain data; confirming the pole number according to the obtained target later period response and an improved integral least square matrix binding method and carrying out pole characteristic extraction. The invention adopts the frequency domain data which is can be acquired more easily by a calculation approach, thereby replacing a darkroom shrinking ratio test and saving a great amount of test cost. The invention can realize the pole characteristic extraction on the complicated target, such as various airplane and warship targets. The invention also provides a device for extracting the pole characteristic of the complicated target.

The invention discloses a nitriding PVD (Physical Vapor Decomposition) composite coating and a preparation method thereof. The internal structure of a diffusion layer comprises a nitrogen-containing oversaturated martensitic structure, a metal nitrogen compound, a metal carbon compound and Fe4N phase; the internal structure of a compound layer comprises Fe4N phase of a face-centered cubic structure, CrN phase of the face-centered cubic structure, and Fe2-3N phase of a close-packed hexagonal structure; the internal structure of a PVD hard film layer mainly comprises fcc-(Cr, Al)N phase of the face-centered cubic structure and further comprises a small number of hcp-AlN phase of the close-packed hexagonal structure, and fcc-(Ti, Al)N phase of the face-centered cubic structure. With the adoption of the reasonable technologic optimization and adjustment and control of the structure, the decomposition of the compound layer can be inhibited; the Fe4N phase and the CrN phase in the compound layer become nucleation particles for phase epitaxial growth of the PVD hard film, so as to obviously increase the film-matrix binding force; the compound layer provides powerful support for the PVD hard film; moreover, the compound layer enables the stress on the film-matrix interface to be continuously changed, so as to improve the interfacial stress concentration situation, and improve the bearing capacity, the surface hardness and other mechanical properties of the composite coating.

The invention discloses an AlTiN coating and a preparation method thereof. The AlTiN coating is composed of a Cr bombardment implanting layer, a CrN transition layer and an AlTiN surface function layer. The binding force of the AlTiN coating and a matrix is strong enough, the peeling-off phenomenon is not prone to being generated, and the friction coefficient is small under high temperature. The preparation method comprises a matrix cleaning procedure, an etching procedure, a Cr bombardment implanting layer deposition procedure, a CrN transition layer deposition procedure, an AlTiN surface function layer deposition procedure and a cooling procedure. In the three specific deposition procedures, the cathode pulsed arc technology is applied, and higher-density plasma can be generated during pulse discharging by adjusting the maximum value, the minimum value, the duty ratio and frequency of currents output by a pulsed arc power source; and compared with an AlTiN coating prepared by a traditional arc ion plating technology, the AlTiN coating prepared through the method has the advantages that the surface roughness of the coating is obviously reduced, the number of large particles on thesurface is obviously reduced, the film layer compactness is higher, the film-matrix binding force is higher, and the friction coefficient under the high temperature is lower.

The invention discloses plasma cleaning equipment in a two-sided turnover door structure. The plasma cleaning equipment comprises a vacuum system, a door, a vacuum chamber body, a hinge, a rack component, a high-pressure lead-in component, a support, a polar plate, a hinge fixing plate, a hinge shaft, a hinge plate, a positioning device, a rotary shaft, a handle and a computer control system, wherein the vacuum system has the main characteristics that the plasma cleaning equipment consists of a roots pump (main pump), a screw pump (backing pump) and a roughing valve; the door has the main characteristics that the door consists of a flat plate, and a lamp rack component is arranged on the flat plate; the vacuum chamber body has the main characteristics that the vacuum chamber body consists of a shell; a sealing ring, an air suction opening, an observation window, an atmosphere point measurement point, an air charging system, a gauge tube port and an air entraining device; and the air entraining device comprises a precise gas mass flowmeter. The plasma cleaning equipment has the advantages that compared with a lamp processed by the traditional equipment, the film-matrix binding force and the reflective rate after the lamp processed by the plasma cleaning equipment is subjected to vacuum coating can be improved greatly. Compared with the traditional equipment, the plasma cleaning equipment is simple in structure, smaller in occupied area, shorter in production cycle and higher in efficiency.

The invention relates to the technical field of powder metallurgy, and more specifically, discloses a combined strengthening treatment method for metal plasma immersion ion implantation and depositionon the surfaces of spallation target balls. The strengthening treatment method comprises the steps of carrying out pre-treatment of the spallation target balls, carrying out TiSiN, TiAlN, TiAlSiN, TiAlSiN/h-BN ion implantation and deposition, and the like. The method has the advantages that the problems that the wear rate of the spallation target tungsten-iron-nickel target balls in a non-intermetallic compound form prepared through a powder metallurgy technology is high, the residual stress between a thin film and a matrix is large, the film-matrix binding force is poor, and the bearing capacity of a single film layer is poor can be solved, the surface of the thin film is effectively prevented from being peeled off, and a functionally gradient composite material which is high in film-matrix binding force, high in hardness, low in friction coefficient and high in wear resistance can be prepared.

The invention discloses a cutter surface plasma vacuum coating pretreatment process which comprises the following steps: white corundum dry spraying; glass bead dry spraying; white corundum wet spraying; main cleaning; and drying. According to the cutter surface plasma vacuum coating pretreatment process disclosed by the invention, a sand blasting method which integrates the white corundum dry spraying operation, the glass bead dry spraying operation and the white corundum wet spraying operation is selected, so that residues on the surface of a cutter can be thoroughly removed; after the removal of burrs, the cutting edge of the cutter is rounded to a certain extent, so that the service life of the cutter can be effectively prolonged under the premise that the binding force is guaranteed;and for slotting cutters, the cutter surfaces can be effectively treated under the circumstance that cutting edges are protected, and the film layer and matrix binding force can be improved.

A structural component on the basis of a mineral, crystalline binder matrix composed of hardened cement and/or construction lime and/or gypsum, wherein the matrix can have aggregates and/or additives and/or admixtures, forms a surface that receives light, in its usability or use, on which surface photocatalytically active particles are situated. The particles are situated and fixed in place only on the surface of the structural component. The remainder of the structural component body does not have the particles. A method for production of the structural components is also provided.

An affinity matrix comprising a base matrix containing biotin; and a fusion protein attached to the base matrix, wherein the fusion protein contains a matrix binding element capable of binding to the base matrix via biotin and a target binding element capable of binding, or being bound by, at least one target component.

The invention provides a polycrystalline diamond clad sheet which comprises a hard alloy matrix and a polycrystalline diamond layer arranged on the hard alloy matrix, wherein the polycrystalline diamond layer comprises a self-supporting diamond film and mixed powder; the self-supporting diamond film comprises a first columnar self-supporting diamond film and multiple second columnar self-supporting diamond films distributed around the first columnar self-supporting diamond film; the first columnar self-supporting diamond film and the second columnar self-supporting diamond films are perpendicularly arranged on the surface of the hard alloy matrix; the area of the cross section of the first columnar self-supporting diamond film is larger than that of the cross section of each second columnar self-supporting diamond film; the mixed powder is uniformly dispersed around the first columnar self-supporting diamond film and the second columnar self-supporting diamond films; and the mixed powder comprises diamond powder and boron carbide powder. The polycrystalline diamond clad sheet provided by the invention is excellent in heat conductivity, impact resistance, film matrix binding force and wear resistance.

The invention discloses a preparation method of a Cr-doped DLC coating. The advantages that the smoothness, uniformity and density of a high-power pulse magnetron sputtering film layer are high are sufficiently utilized, and a bottom layer and transition layer design method is adopted in order to overcome the defects that the binding force of the DLC coating and the toughness of the film layer arepoor. By means of the unique film system design and mixing process, it is guaranteed that the binding force of the coating is improved, and it is also guaranteed that the coating deposition rate, thecoating density and the wear resisting and friction reducing performance are improved. The appearance of the Cr-doped DLC coating prepared through the method is ash black, the surface is smooth and dense, the hardness of the coating is 32 GPa, the film-matrix binding force reaches 72 N, and the coating thickness is 1.45 micrometers. The dry friction coefficient of the coating is 0.2. It is shownthat the Cr-doped DLC coating has good wear resisting and friction reducing performance.

A method of reducing the amount of matrix-bound NNK in cured tobacco plant material is provided comprising reducing the amount of lignin in the cured tobacco plant material. A further method of reducing the formation of matrix-bound NNK during the curing of tobacco plant material is described comprising reducing the amount of lignin therein prior to curing.

A sintered refractory product consisting of: a granulate consisting of all the particles having a size larger than 100 [mu]m, or "grains", the granulate representing between 55% and 85% by mass of the product, the maximum size of the grains being smaller than 3.5 mm, and a matrix binding said grains and consisting of the particles having a size smaller than or equal to 100 [mu]m, or "fine particles", said matrix comprising at least one crystallised SiAlON phase of formula SixAlyOuNv, in which x is greater than or equal to 0, greater than 0.05, greater than 0.1 or greater than 0.2, and less than or equal to 1, less than or equal to 0.8 or less than or equal to 0.4; y is greater than 0, or greater than 0.1, greater than 0.3 or greater than 0.5, and less than or equal to 1; u is greater than or equal to 0, greater than 0.1 or greater than 0.2, and less than or equal to 1 or less than or equal to 0.7; v is greater than 0, greater than 0.1, greater than 0.2 or greater than 0.5, or greater than 0.7, and less than or equal to 1; at least one of stoichiometric indices x, y, u and v being equal to 1, the volume of the fraction of the pores having a size of between 10 and 100 microns being greater than 4% of the total volume of pores.

The invention discloses waterproof paint for river channel dredging equipment. The waterproof paint comprises, by weight, matrix resin, organic silicon resin, methyl vinyl silicone rubber, inositol hexaphosphate, glycerin monostearate, sodium dodecyl sulfate, butyl-hydroxy polyurethane, zinc oxide, dibasic lead phosphite, calcium carbonate, aluminum stearate, silicon nitride, n-butanol, tricarboxylic methylpropane, nanometer graphene, magnesium oxide, boron nitride, borosilicate glass powder, talc powder, titanium dioxide, zeolite, lac, carbon black, silicone oil and deionized water. The waterproof paint has the advantages that the waterproof paint is high in metallic matrix binding force, and the adhesion, the leveling properties and the mechanical properties of coatings can be effectively improved; the waterproof paint is good in corrosion resistance and leveling property, the foamed coatings are high in metallic matrix binding capacity and flatness and difficult to peel or crack andhave smooth surfaces, good waterproof and anticorrosion effects can be realized, and the waterproof paint is high in environmental weather resistance and suitable to be used for the river channel dredging equipment.