32results about How to "Uniform coating structure" patented technology

The invention relates to an aerogel composite material with a surface subjected to dust-free treatment and a preparation method thereof, in particular to a method using an aerogel felt, an aerogel plate, an aerogel cylinder and an aerogel shaped piece as the base material and coating the substrate surface with compact coating so as to avoid shedding of aerogel surface dust. The method is simple and practicable, can effectively solve the problem of easy generation of dust on the aerogel surface, significantly improves the working environment, and can satisfy the use condition of aerogel in clean space. By adopting different ratios, a rigid coating and a flexible coating can be obtained, high temperature and low temperature application can also be achieved, compound proportioning of an inorganic film-forming agent and an organic film-forming agent also can give consideration to flexibility and fire resistance, and significantly improves the adaptability of the coating paste to different types of aerogel materials. The aerogel subjected to dust-free treatment can be applied to heat preservation of various industrial equipment and pipeline, and also can be applied to thermal insulation of high speed rail, vessels, electronics and pharmaceutical workshops and building field.

The invention discloses a conductive polymer-carbon coated silicon oxide composite material and a preparation method thereof. The conductive polymer-carbon coated silicon oxide composite material comprises a conductive polymer, a silane coupling agent, carbon and silicon oxide, wherein the carbon is directly coated on a surface of a silicon oxide particle, the silane coupling agent is absorbed toa surface of the carbon, and the conductive polymer is embedded into carbon gaps and also is uniformly coated on the surface of the carbon by a bridge chain effect of the silane coupling agent. The preparation method of the conductive polymer-carbon coated silicon oxide composite material comprises three steps of highly mixing the silicon oxide and a carbon source, performing high-temperature sintering (curing and carbonization) and coating the polymer. The prepared composite material is very uniform in coating structure and has relatively low volume expansion effect and excellent electrochemical performance, the initial charge-discharge efficiency can be obviously improved, and particularly, relatively poor cycle property of a silicon oxide negative electrode material is improved.

The invention discloses a resin-combined tundish light coating and a preparation method thereof. The tundish light coating is composed of the following components in parts by weight: 85-95 parts of magnesia and/or forsterite with the particle size being larger than 0mm and less than or equal to 0.5mm, 0.3-6.0 parts of resin powder, 0.01-2.5 parts of organic acid, 0.1-3 parts of hollow organic fiber, 0.5-3 parts of paper fiber, 0.1-0.3 parts of magnesian sintering aid and 0.01-0.2 part of sodium salt dispersant. The preparation method comprises steps of preparing raw materials, mixing and stirring the raw materials in sequence, adding water and stirring. The tundish light coating is small in volume density, high in strength, good in liquidity, high in hardening rate, uniform in coating structure and the like.

The invention belongs to the technical field of surface treatment and particularly relates to a neodymium iron boron rare earth permanent magnet surface anti-corrosion coating and a preparation method thereof. The neodymium iron boron rare earth permanent magnet surface anti-corrosion coating is composed of a bottom coating and a top coating, the thickness of the bottom coating is in a range from 10mum to 25mum, the chemical components of the bottom coating comprise 55% to 65% of one or two types of metals of zinc and aluminum, 0% to 5% of one or a plurality of types of metals of nickel, chromium, molybdenum, neodymium, praseodymium, cobalt and titanium and 34% to 40% of neutral resins, the thickness of the top coating is in a range from 5mum to 15mum, and the chemical components of the top coating comprise 55% to 65% of one or a plurality of types of metals of zinc, aluminum, titanium, molybdenum, nickel, cobalt and chromium and 35% to 45% of phenolic resins or acrylic resins. The preparation method includes that firstly the surface of a permanent magnet is preprocessed, a centrifugal immersion tossing is utilized to prepare the bottom coating, and a rolling spraying process is utilized to prepare the top coating. The neodymium iron boron rare earth permanent magnet surface anti-corrosion coating and the preparation method thereof have the advantages that by means of double layers of coatings, the corrosion resistance is high, the surface binding force is high, the usage temperature is higher than 200 DEG C, the magnetic property of the neodymium iron boron rare earth permanent magnet is improved, the service life is prolonged, and the service environment is widened.

An electrical arc spraying method for preparing amorphous-coating dust core wire containing CrB belongs to hot spraying domain in material processing project and is mainly used in various industrial domains including anticorrosive domain and wearable domain. The amorphous alloy is association of high strength, hardness, tenacity, abradability and noncorrosibility, but there is no patent report about the electrical arc spraying method for preparing iron-base amorphous-coating dust core wire both at home and abroad. The invention is about an electrical arc spraying method for preparing amorphous-coating dust core wire containing CrB and is characterized in that the mass percentage content range of the said dust core components is as follows: 60-80 % boron- chromium, 5-20 % Cr3C2, 5-10 % WC and the residue is iron dust. The covering prepared with the invented dust core contains a good deal of amorphous carborundum, the coating formation is even and has high rigidity with HV0.1 of more than 1190, and has good abradability and the relative abradability is 15.8 times than the Q235 steel.

The invention discloses a surface coating part for reproduction of a ball mill liner plate and a manufacturing method for the surface coating part, and belongs to the field of reproduction of engineering machines. The surface coating part comprises a substrate and a coating layer. The substrate comprises, by weight, 0.30-0.44% of C, 1.50-2.0% of Si, 0.8-1.40% of Mn, 2.0-2.8% of Cr, 0.3% of Mo or less, 0.3% of Ni or less, 0.02% of Re, 0.04% of P and S and the balance Fe. The coating layer comprises, by volume, 95-98% of WC-Co powder and 2-5% of Cr, and the weight ratio of Cr to Co is 0.2-0.5. The surface coating part for reproduction of the ball mill liner plate and the manufacturing method for the surface coating part can give the special properties like abrasion resistance and corrosion resistance to parts, improve the reliability of the parts, prolong the service life of the parts and especially improve the abrasion resistance of a work surface of the ball mill abrasion-resistant liner plate.

The invention discloses a directional ultrahigh-velocity spraying method and device based on a laser induced shock wave technology, belonging to the technical field of part processing and remanufacturing. According to the spraying method, a high-temperature electric arc generated by an electrode is firstly used for heating and melting spray wires of a coating material to form molten drops and the molten drops fall off and are atomized into a microdrop stream; then a laser pulse beam is used for irradiating the surface of the microdrop stream; a part of microdrops on the surface absorb laser energy and are instantly gasified and ionized into high-pressure plasma; the high-pressure plasma further absorbs laser energy and expands and blows up to form high-pressure shock waves at GPa grade; the high-pressure shock waves drive the corpuscular stream to jet onto the surface of a workpiece at a high velocity to form a coating. The spraying device comprises a laser generator, a beam guiding and splitting system, an electric arc liquid making system, a workpiece clamp system, a recycling system and a control system. The spraying device can be used for realizing high-velocity high-efficiency spraying; the combination strength of the coating and a substrate is good; the coating has high density and low void content and also has relatively high thermal fatigue resistance and mechanical fatigue resistance.

The present invention relates to a nickel trisilicon titanium intermetallic compound-titanium carbide composite coating material and a method for preparing the same; a composite coating mainly consisting of Ni3(Si, Ti) intermetallic compound and TiC ceramic is made on a high-temperature ultratek substrate by laser cladding in situ; the coating material mainly comprises four elements: Ni, Si, Ti and C; the chemical components of the four elements have the following weight percentages: 8 percent to 20 percent Ti powder plus C powder; 78 percent Ni, 13 percent Si and 9 percent Ti; the preparation method adopts the laser to clad and has the following parameters: the output power is between 1000 W and 1500 W; the scanning speed is 4-6 mm/s. the spot diameter is 4 mm; the protective gas is Ar gas in cladding; the cladding substrate material is high-temperature ultratek; the invention has the following procedures: according to the mixture ratio, the coating material is mixed uniformly and pre-coated or hot-sprayed on the surface of the high-temperature ultratek substrate; the thickness is between 1 mm and 1.2 mm; the laser is adopted to have multilayer and multi-path cladding; each channel has related joint of 1.8 mm, thereby achieving the cladding layer with different thickness.

The invention discloses a method for preparing a wear-proof and anti-corrosion concomitant composite sintering coating on a powder sintering function indication coating incorporated with phosphorescence incandescent particles and an indication coating prepared through incorporating phosphorescence incandescent particles. By means of the composite sintering coating, the wear resistance of part surfaces, the wear resistance of a corrosion-resistance coating, and the corrosion self-sensitive luminescence detection or the anti-counterfeiting of equipment assembly parts are achieved.

The invention provides a carbon nanotube/titanium dioxide composite film and a preparation method and application thereof. The carbon nanotube/titanium dioxide composite film comprises a single-walledcarbon nanotube film, the single-walled carbon nanotube film is of a network structure composed of staggered carbon nanotubes, the surfaces of the carbon nanotubes are coated with a coaxial titaniumdioxide layer, and the titanium dioxide layer is composed of a plurality of nano titanium dioxide spheres. The flexible carbon nanotube titanium dioxide composite film is assembled through in-situ hydrolysis and high-temperature calcination and has high sensitivity and excellent selectivity to NO at room temperature and simplifies the preparation process and can realize rapid recovery and completerecovery and has good stability.

The invention discloses an iron-based wear-resistant composite material and a preparation method thereof. The preparation method comprises the following steps: preparing an iron-based wear-resistant composite coating on the surface of an iron-based alloy matrix material by using iron-based composite powder by using a laser cladding method to obtain a composite body; polishing and cleaning the surface of the composite body; then carrying out laser shock, and surface enhancement treatment of the iron-based wear-resistant composite coating is achieved; performing cyclic heat treatment on the composite with the surface subjected to laser shock to eliminate residual stress; and the iron-based composite powder is obtained by uniformly mixing micron La2O3 powder, micron Al2O3 powder and micron FeCrNiSiB powder, carrying out liquid nitrogen circulation subzero treatment and drying, and the iron-based composite powder contains the following components in percentage by mass: 0.05%-10% of the micron La2O3 powder, 0.1%-45% of the micron Al2O3 powder and 50%-95% of the micron FeCrNiSiB powder. According to the iron-based wear-resistant composite material and the preparation method thereof provided by the invention, the composite coating with good performance is prepared on the surface of an iron-based alloy material, the service life of an iron-based alloy matrix is prolonged, and the preparation method has great significance in repairing and reconstruction of engineering machinery.

The invention discloses a preparation method of a high-purity fine-grained zirconia ceramic bar for flame spraying, belonging to the technical field of material surface protection. The method comprises the following steps: (1) carrying out spray granulation on high-purity nano zirconia powder to obtain spherical zirconia powder raw material; (2) dissolving polyvinyl alcohol in distilled water, adding a stabilizer, and stirring uniformly to obtain a polyvinyl alcohol aqueous solution binder; (3) adding the spherical zirconia powder raw material into the polyvinyl alcohol aqueous solution binder, adding a lubricant and a plasticizer, and mixing by using a vacuum mixer for pugging; (4) placing zirconia mud pellets into a vacuum extruder, and extruding for molding to obtain a green body; (5) sequentially removing water and organic matters from the green body to obtain a mature blank body; (6) sintering the mature blank body to obtain the zirconia ceramic bar. The high-purity fine-grained zirconia ceramic bar prepared by the method is low in impurity element content and small in grain size, and can be used for preparation of a zirconia coating on the surface of a graphite crucible or anextrusion die.

The invention relates to electron beam evaporative vacuum coating equipment which comprises a cavity assembly, an umbrella frame assembly, a high valve assembly, a copious cooling system, a pipeline system, a diffusing pump, a roots pump, a mechanical pump, an ion source pump, an electron gun assembly, an electric control cabinet assembly, a linear slot assembly and a door clamping assembly. The umbrella frame assembly is fixed to the cavity assembly, the high valve assembly is connected to the cavity assembly, the high valve assembly, the diffusing pump, the roots pump and the mechanical pumpare connected together through a pipeline system, and the door clamping assembly is mounted on the cavity assembly. An electron gun part of the electron gun assembly and an ion source part of the ionsource assembly are mounted in the cavity assembly. The copious cooling system comprises two copious cooling coils, one of which is mounted in the cavity assembly while the other one of which is mounted in the high valve assembly. The electron beam evaporative vacuum coating equipment has the characteristics of being simple in mechanism, high in uniform repeatability of coating structure and highin coating efficiency, and the cavity dimension can reach 2700 mm and the like.

The invention provides a simple hollow fiber membrane coating tool, which comprises a hollow fiber membrane fixing part, a support part, and a handle. The hollow fiber membrane fixing part fixes a hollow fiber membrane; a user can hold the handle to soak the tool in a graduated cylinder filled with coating liquid; the support part is tightly pressed against the inner wall of the graduated cylinder; and the hollow fiber membrane is evenly painted.

The invention discloses a coating method for coating composite ceramic coating layers on the surfaces of refractory metal parts. Firstly, the surfaces of the refractory metal parts are modified; then,a thickening agent and a dispersing agent are added in organic solvent, and composite ceramic coating layer powder is added for ball milling to prepare suspension pulp; the solid content of compositeceramic coating layer powder in the suspension pulp is controlled within 40-65%; the viscosity of the suspension pulp is 10-30 mm2/s; then, the suspension pulp is uniformly sprayed on the modified surfaces of the refractory metal parts to obtain coating layer blanks; and finally, the coating layer blanks are sintered to form the composite ceramic coating layers on the surfaces of the refractory metal parts. The coating method improves the bonding performances between the composite ceramic coating layers and refractory metal, improves the uniform coating property of the composite ceramic coating layers, and realizes uniform coating of the composite ceramic coating layers on the surfaces of the refractory metal parts with large sizes, multiple dimensions and complicated shapes.

The invention relates to a hot spraying material, and particularly relates to a special high-temperature fly ash wear resistant arc spraying wire for an amorphous nanocrystal and a coating prepared therefrom, belonging to the technical field of wear resistant materials. The wire comprises the following components in percentage by mass: 20.0-22.0% of Cr, 4.0-6.0% of Mo, 3.0-5.0% of B, 3.0-5.0% of Nb, 1.0-2.0% of C, 1.0-2.0% of Mn, 0.5-1.0% of Si and the balance of iron. After the wire developed by the invention is applied onto a metal matrix subjected to sand blasting and coarsening according to arc spraying process parameters in the prior art, the prepared coating contains a large number of amorphous nanocrystal structures and is uniform in microstructure and extremely high in hardness, the normal-temperature HV0.3 is higher than 1100, and the porosity is lower than 5%; and the wear resistant coating provided by the invention has high bonding strength (higher than 75 MPa at normal temperature) and excellent shock resistance toughness, and the high-temperature hardness HV0.3 at 600 DEG C is higher than 350.