299 results about "Ion plating" patented technology

The invention provides a lead-bismuth reactor nuclear sampler coating and a preparation method thereof.The preparation method comprises the steps that S3, according to the thickness of a CrAl coating, the bias voltage and target current of multi-arc ion plating equipment are adjusted, the bonding strength of the coating and a base body is optimized, and the target adhesive force reaches the scratch test critical load or above; s4, according to the bonding strength, the nitrogen flow and the air pressure are adjusted, a compact CrAl coating microstructure with the porosity lower than a porosity threshold value is generated, and the quality of the microstructure is detected and verified through a scanning electron microscope; s7, according to the thickness consistency, a screw rod or a pin shaft is selected as a base body part, a CrAl coating is deposited on the surface of the screw rod or the pin shaft to be matched with the sleeve cap, and the gap between the sleeve cap and the shaft part is controlled to be within a gap threshold value; and S10, according to hardness and wear resistance test results, the deposition time and bias voltage are adjusted, the performance of the CrAl coating and the performance of the TiN coating are optimized, and the requirements for long-term corrosion resistance and wear resistance in the lead-bismuth alloy environment are met. According to the invention, excellent performances of long-term corrosion resistance and wear resistance in a high-temperature lead-bismuth environment are realized, and the service life of parts is remarkably prolonged.

The invention discloses an AlCrN / TiSiN / AlCrTiSiON pre-oxidation multilayer composite coating and a preparation process thereof, belonging to the technical field of coatings. The bottom layer of the composite coating is an AlCrN transition layer, and an AlCrN / TiSiN nano multilayer film and a TiSiN high-hardness layer are sequentially stacked for 1-4 times on the transition layer; The outermost layer is a compact AlCrTiSiON pre-oxidation coating, wherein the AlCrTiSiON pre-oxidation coating has excellent wear resistance and heat resistance. The coating is prepared by adopting an arc ion plating technology. The invention prepares the pre-oxidation coating with high hardness, high wear resistance and high heat resistance through process design and optimization of coating structure and pre-oxidation layer process parameters.

The invention relates to the technical field of deposition of wear-resistant and corrosion-resistant coating materials on metal surfaces, in particular to a high-toughness CrNbZrNiSiBN high-entropy nitride coating and a preparation method thereof. A bonding layer formed by a Cr layer, a transition layer formed by a CrN layer and a functional layer coated with CrNbZrNiSiBN high-entropy nitride are sequentially arranged on the surface of a base material. And the total thickness of the coated functional layer is 2-10 microns. The method is completed by adopting an ion beam assisted arc ion plating technology, and the prepared composite coating has the advantages of relatively high hardness, relatively good toughness, wear resistance, corrosion resistance, high-temperature oxidation resistance and the like. The coating can be used for strengthening and protecting the surfaces of cutters, molds, aerospace, marine ship parts and the like.

The invention discloses a hydrophobic diamond-like carbon coating and a preparation method thereof. The hydrophobic diamond-like carbon coating comprises a transition layer and an F-DLC layer. The preparation method comprises the following steps: S1, cleaning the substrate; s2, the coating chamber is vacuumized and heated, and the coating chamber and the base body are baked; s3, carrying out ion etching cleaning on the surface of the substrate; s4, after etching is completed, a Cr layer or a Ti layer is deposited on the surface of the base body in a magnetron sputtering mode to serve as a transition layer; and S5, inert gas and carbon tetrafluoride are introduced, the graphite target is started, and the F-DLC layer is deposited in an arc ion plating mode. Wherein in the step S5, the ratio of the introduced inert gas to the carbon tetrafluoride is 1: 0.3-1: 4, the cavity pressure of the coating cavity is 0.1-5.0 Pa, the bias voltage of the substrate is 20-800 V, and the target current of the graphite target is 20-400 A. The hydrophobic diamond-like coating is prepared in an electric arc ion plating mode, the characteristics that the target material particle energy is improved, the deposition rate is high, and the film layer compactness is good are achieved, and the prepared coating is better in hydrophobic angle and excellent in anti-sticking performance.

The invention discloses an AlCrN / AlCrSiWN nano multilayer composite coating with ultrahigh hardness and a preparation process of the AlCrN / AlCrSiWN nano multilayer composite coating, and belongs to the technical field of material surface coatings. The composite coating comprises an AlCrN transition layer, an AlCrN / AlCrSiWN nano multilayer modulation coating and an AlCrSiWN functional layer which are sequentially deposited on a substrate, the AlCrN / AlCrSiWN nano multilayer modulation coating is formed by alternately overlapping AlCrN layers and AlCrSiWN layers, the modulation period is 5-200 nm, and the modulation ratio of the AlCrSiWN layers to the AlCrN layers is 1: (1.5-5). The coating is prepared by adopting an arc ion plating technology. According to the preparation method, the AlCrN / AlCrSiWN nano multilayer composite coating with ultrahigh hardness is prepared by alternately depositing the AlCrSiWN coating and the AlCrN coating, and the hardness and the toughness of the coating are synchronously improved.

The invention discloses a super-lubricating and corrosion-resistant DLC (diamond-like carbon) protective coating and a preparation method thereof, and belongs to the technical field of protective coatings. The coating is prepared on a base body through magnetron sputtering and magnetic filtering arc ion plating processes, a multi-layer composite structure is formed by doping transition metal elements and non-metal elements, and the multi-layer composite structure comprises a cleaning modification layer, a gradient transition layer, a combination strengthening layer, a main functional layer and a surface lubricating layer. Through element doping, the internal stress of the DLC coating is effectively reduced, the surface lubricity is enhanced, the bonding strength of the coating and a matrix is improved, and meanwhile the high hardness and excellent wear resistance of the DLC coating are reserved. In addition, the preparation process is simple, is suitable for industrial production, and can be widely applied to surface protection in the fields of molds, automobiles, aerospace and the like.

The invention discloses a rubber tapping machine blade, a preparation method thereof and an automatic rubber tapping machine, and relates to the technical field of natural rubber tapping. The rubber tapping machine blade comprises a blade base body, a bonding layer, a transition layer and a functional layer, the bonding layer, the transition layer and the functional layer are sequentially arranged on the surface of the blade base body, the bonding layer is a TiAlN coating, the transition layer is a TiSiN coating, and the functional layer is a TiBC coating or a TiBCN coating; wherein the content of C in the TiBC coating is greater than 0 at.% and less than 20 at.%; the content of C in the TiBCN coating is larger than 0 at.% and smaller than 20 at.%, and the content of N in the TiBCN coating is larger than 0 at.% and smaller than 10 at.%. The bonding layer, the transition layer and the functional layer can be prepared through arc ion plating; the rubber tapping machine blade is excellent in abrasion resistance, corrosion resistance, hydrophobicity and sharpness retentivity, low in friction coefficient and suitable for the automatic rubber tapping machine, the sharpness retentivity of the automatic rubber tapping machine blade can be effectively improved through the composite coating, the service life of the automatic rubber tapping machine blade can be effectively prolonged, and the rubber tapping effect of the automatic rubber tapping machine can be effectively improved.

A vacuum induction melting (VIM) furnace and method of using. A VIM is configured for use with metal-containing carbon powders. In operation, the metal-containing carbon powders are formed into a pellet so as to minimize or eliminate ejection of material during introduction of the pellet into the VIM processor. The VIM processor may be substituted or used in combination with a vacuum arc melt processing apparatus, an electron beam melt furnace, an ion plating furnace, a plasma flame source, a smelter, a traditional metal-metal melt furnace, or any equivalent. Pelletizing can be accomplished through use of a press or through application of any pelletizing technique and / or use of any apparatus that is able to generate pellets that have sufficient mass to avoid ejection from a VIM processor.

The invention relates to the technical field of cutter coatings and surface coatings, in particular to a high-temperature self-lubricating wear-resistant nano-composite oxynitride coating and a preparation method and application thereof.The coating is prepared through the multi-arc ion plating technology, and the preparation method comprises the steps that Ar < + > ion bombardment, Cr < + > ion implantation and CrN transition layer deposition are sequentially conducted on a base body; and finally, by changing the partial pressure of oxygen in the mixed gas in the chamber, the AlCrVSiON functional coatings with different oxygen contents are deposited. According to the invention, V is added into the AlCrSiN coating, so that the coating generates a Magneli phase under high temperature or friction to form a self-lubricating layer, the friction coefficient is effectively reduced, and the friction performance is improved. Meanwhile, due to the addition of the element O, the coating has good high-temperature oxidation resistance and stable high-temperature mechanical property, and the defects that the mechanical property is reduced and the wear rate is increased due to coating oxidation at high temperature are overcome, so that the coating can be applied to the field of high-temperature cutting.

The invention relates to the technical field of die-casting die surface treatment, in particular to a high-temperature protection composite coating for a die-casting die and a preparation method and application of the high-temperature protection composite coating. The composite coating sequentially comprises a nitrogenous diffusion layer, a Cr bonding layer, a CrN transition layer and an AlCrWSiN working layer from a die base body to the surface. The nitride composite coating with the element content in continuous gradient change is efficiently prepared through the arc ion plating multi-target co-deposition technology, the high-temperature protective coating material suitable for the aluminum alloy die-casting die is rapidly screened out, the high hardness, high abrasion resistance and excellent molten aluminum corrosion resistance of the surface of the die-casting die are effectively improved, and the research and development efficiency is improved. The method is simple, controllable, good in repeatability, high in practicability and capable of being applied to the field of aluminum alloy die-casting dies.

The utility model relates to an arc ion plating device, which belongs to the field of arc ion plating and comprises a base and a plating chamber fixedly connected to the upper surface of the base, and an auxiliary structure for assisting in plating is arranged on the upper surface of the base. The auxiliary structure comprises a mounting groove formed in the upper surface of the base, a servo motor fixedly connected to the inner bottom wall of the mounting groove, a rotating rod fixedly connected to an output shaft of the servo motor, a supporting disc fixedly connected to the top end of the rotating rod, a positioning assembly arranged on the upper surface of the supporting disc and a containing disc. According to the arc ion plating device, continuous and stable rotation of the workpiece in the plating chamber is realized through the auxiliary structure, and the rotation mechanism ensures that an ion beam can uniformly bombard the surface of the workpiece at different angles and directions, so that the problems of non-uniform plating thickness, performance difference and the like caused by the fact that the workpiece is fixed in a traditional device are solved; and through rotary coating, the uniformity of the coating is improved, and the quality and consistency of the coating are also remarkably improved.

The invention discloses a NiCoCrAlYHfRe coating for Ni-based high-temperature alloy and a preparation method of the NiCoCrAlYHfRe coating, and belongs to the technical field of high-temperature protective coatings. The NiCoCrAlYHfRe coating is deposited on the Ni-based high-temperature alloy matrix by adopting an arc ion plating technology and a vacuum annealing treatment method. Compared with a traditional MCrAlY (M = Ni / Co) high-temperature protective coating, active elements Hf and Re are added into the coating, stripping of an oxidation film can be effectively delayed, the high-temperature oxidation resistance of the coating is improved, and therefore the service life of the coating is effectively prolonged. The NiCoCrAlYHfRe coating disclosed by the invention is simple in preparation process, controllable in component, good in repeatability and easy to realize industrial popularization.

The invention discloses a preparation process of an ultra-high hardness AlCrN / AlCrSiWN nano multilayer composite coating, and belongs to the technical field of material surface coatings. The process is carried out by adopting an arc ion plating technology and specifically comprises the following steps: (1) respectively placing an AlCrSiW target and an AlCr target on corresponding cathode target positions; vacuumizing until the vacuum degree is 3.0 * 10 <-3 > Pa or above; (2) bombardment etching is carried out on the substrate; (3) depositing an AlCrN transition layer; (4) depositing an AlCrN / AlCrSiWN nano multi-layer modulation coating layer; and (5) depositing an AlCrSiWN functional layer. According to the preparation method, the AlCrSiWN coating and the AlCrN coating are alternately deposited, so that the AlCrN / AlCrSiWN nano multilayer composite coating with ultrahigh hardness is prepared, and the hardness and the toughness of the coating are synchronously improved. And a breakthrough solution is provided for meeting high-end requirements in the field of surface strengthening of precision cutters and molds.

The present invention discloses a vacuum ion coating device capable of uniformly coating films, which relates to the technical field of coating devices and includes a support plate. A vacuum coating device main body is arranged at the upper end of the support plate, and a protective door is arranged on one side of the vacuum coating device main body; in the vacuum ion coating device of this design, when the inner wall of the vacuum coating device main body needs to be cleaned, the output end of the lifting motor drives the lifting screw rod to rotate along the inside of the threaded hole, so that the lifting frame drives the rotating seat to descend. During the descending process, the output end of the first rotating motor drives the rotating gear to engage along the inside of the tooth groove, so that the tooth groove drives the rotating seat to rotate, and at the same time drives the cleaning brush to rotate along the inner wall of the vacuum coating device main body, thereby rotating and cleaning the inside of the vacuum coating device main body. There is no need for manual cleaning of the inside of the vacuum coating device main body, which saves time and effort and improves the cleaning efficiency.

The invention provides a high-hardness and scratch-resistant antireflection film and a preparation method thereof. The high-hardness and scratch-resistant antireflection film comprises a substrate, a metal aluminum transition layer, a Ta2O5 / inner DLC / AlOxNy alternating layer and an outer DLC layer, wherein the number of alternate layers is 10-20, the thickness of the metal aluminum transition layer is 100-120 nm, the thickness of the Ta2O5 layer is 40-50 nm, the thickness of the AlOxNy layer is 50-60 nm, the thickness of the inner DLC layer is 20-30 nm, and the thickness of the outer DLC layer is 80-90 nm; the average light transmittance of the antireflection film is greater than 98.6% within the range of 2-16 [mu] m, the refractive index is 1.37-1.41, and the nano hardness is 35-45 GPa. Multifunctional ion plating equipment is adopted, different process conditions are controlled according to the properties of the film layers, and preparation of all the layers is continuously and sequentially completed. The prepared antireflection film has excellent light transmission and low refractive index, the hardness and scratch resistance are also remarkably improved, and the service life of electronic equipment can be greatly prolonged.

The invention provides a breaking hammer piston and a preparation method applying arc ion plating, and belongs to the technical field of breaking hammers. The technical problems that an existing piston is poor in friction resistance, prone to abrasion in the working process, short in service life and the like are solved. The outer surface of a piston body in the breaking hammer piston is wholly or partially provided with a strengthened coating, the strengthened coating comprises a hard layer and a bonding layer, the bonding layer is connected with the piston body, the hard layer is located on the outer side of the bonding layer, the hard layer is a CrN layer or a WC layer or a WN layer or a CrNiN layer or a CrAlN layer or a CrAlNiN layer or a CrAlW layer, and the bonding layer is a Cr layer or a Ti layer or a TiN layer or a CrN layer. The preparation method comprises the steps of piston pretreatment, vacuum chamber glow cleaning, bonding layer implantation, surface hard layer deposition, post-treatment, cooling and the like. The friction-resistant rubber has the advantages of being better in friction resistance, longer in service life and the like.

The invention relates to the technical field of medical instruments for treating aneurysm, and particularly discloses a vascular spring ring and a coating preparation process thereof. The preparation process of the coating of the vascular spring ring comprises the following steps: S1, taking a tungsten filament, and cleaning the tungsten filament; and S2, the tungsten filament is etched through ion plating. And S3, the surface of the tungsten filament is cleaned through titanium ions, a titanium layer is deposited on the surface of the tungsten filament, and the thickness of the titanium layer is 0.015-0.025 microns. And S4, a gold layer is deposited on the surface of the titanium layer, the thickness of the gold layer is 0.15-0.25 [mu] m, and the raw material wire is obtained. And S5, the raw material wire is manufactured and formed, and the vascular spring ring is obtained. In the process, the tungsten filament is etched through ion plating, so that the surface roughness is improved, and the adhesive force of a subsequent coating is enhanced. And titanium ion cleaning is carried out, and ion plating etching residues are removed. And the thin titanium layer enhances the adhesive force of the pure gold layer. Due to the outermost gold layer, the vascular spring ring has good biocompatibility and corrosion resistance.

The present invention discloses a gradient-structured dispersion-strengthened high-entropy alloy nitride ceramic coating and a preparation method thereof. After sequentially depositing a Cr film and a FeCrAlTi film on a substrate by using a method combining multi-arc ion plating and magnetron sputtering, an FeCrAlTiSi-N film is obtained by sputtering an FeCrAlTiSi target in a nitrogen atmosphere. The coating obtained by the present invention has high film-substrate bonding strength, high hardness, excellent wear resistance and corrosion resistance to liquid lead-bismuth.

The invention belongs to the technical field of biological implant materials, and discloses a medical titanium alloy implant surface modification method and application, and the medical titanium alloy implant surface modification method comprises the following steps: grinding and polishing a titanium alloy surface, and then carrying out ultrasonic cleaning and drying in ethanol; the titanium alloy is placed in multi-arc ion plating equipment, high-purity tantalum serves as a target material, and a tantalum coating is deposited on the surface of the titanium alloy; the surface of the titanium alloy is coated with photoresist, and then a micropore array is formed in the surface of the tantalum coating through the photoetching technology; the titanium alloy is placed in the electrolyte, a Ti plate serves as a cathode, a Ta plate serves as an anode, and hydroxyapatite is deposited in a porous structure through electrochemical deposition; and removing the photoresist to expose the tantalum coating, ultrasonically cleaning with deionized water, and drying. The titanium alloy implant provided by the invention has excellent corrosion resistance, biocompatibility and mechanical properties, and makes up for the deficiency of a single material, so that the titanium alloy implant subjected to surface modification has wider application.

The invention provides a target material rotation and magnetic field coupling arc ion plating device which is matched with magnetic fluid multistage sealing and a double-circulation water cooling system through the design of high-speed rotation of a target material and dynamic coupling of a magnetic field of a static permanent magnet. The core problems of large particle pollution, low target material utilization rate, poor high-temperature working condition stability and the like in a traditional arc ion plating process are systematically solved. By combining internal and external independent water cooling channels, the surface temperature of the target material is stabilized below the working range, and the transmission system temperature rise is small; the modularized magnet and gear transmission design further reduces energy consumption and maintenance cost, and the film thickness uniformity is improved through rotating speed-magnetic field-cooling intelligent regulation and control. And a high-reliability industrial solution is provided for high-performance coating.

This invention relates to a wear-resistant shovel blade for engineering machinery and its preparation method, belonging to the field of engineering machinery parts manufacturing technology. The specific preparation method involves: after rolling, quenching, and high-temperature tempering, the shovel blade material undergoes carburizing treatment using ion plating. Then, a W transition layer and a WTiTaB boride gradient coating with varying composition are prepared using magnetron sputtering. This invention combines the WTiTaB boride gradient coating, physical vapor deposition, and carburizing technology, which can mitigate the difference in physical properties between the boride coating and the substrate material of the shovel blade, improve the surface hardness and support of the substrate material, and result in high surface hardness, core toughness, and excellent tribological properties. Compared with traditional carburizing processes, the surface hardness is increased by nearly three times, the surface treatment time is shortened by more than 90%, and the wear rate is reduced by 78-83%.

This invention discloses a personalized and adaptable spot positioning and filter integration design method. Addressing the technical problems of uneven film thickness and poor film formation consistency in existing large-area coating processes, it constructs a dynamic-static synergistic coating control system by combining the dynamic motion mode of the coating target with the static positioning optimization of the substrate and the precise control of static parameters of the coating environment. Simultaneously, it introduces zoned coating compensation, real-time film thickness monitoring feedback, and dynamic trajectory adaptation strategies to achieve uniform deposition of coating materials on large-area substrate surfaces, effectively improving the film thickness consistency, film formation uniformity, and film performance stability of large-area coatings. This invention is convenient to operate, provides precise control, and is compatible with various coating processes such as magnetron sputtering, vacuum evaporation, and ion plating. It can be widely applied to large-area coating production in fields such as flat panel displays, photovoltaic glass, semiconductor wafers, and large-area optical devices.

The invention discloses a process gas intelligent control system and method for multi-arc ion plating equipment, and relates to the technical field of physical vapor deposition, the process gas intelligent control system comprises a data monitoring system, a data decision system, an instruction execution system and a learning optimization system; the data monitoring system is used for monitoring process monitoring parameters in the process cavity in real time and executing a cavity sealing performance test; the data decision-making system is in signal connection with the data monitoring system and is used for receiving and processing the process monitoring parameters obtained by the data monitoring system and generating a control instruction so as to adapt to the working conditions of equipment safety calibration, arc striking pre-charging and steady-state deposition; the instruction execution system is in signal connection with the data decision-making system and is used for receiving and executing a control instruction of the data decision-making system; the learning optimization system is in signal connection with the data monitoring system and the data decision system; and multi-mode intelligent switching of the process and rapid, stable and overshoot-free control of the vacuum degree are realized.

The present invention relates to the technical field of vacuum coating, and specifically relates to a multi-arc ion plating arc ignition device, which includes an arc ignition mother rod. At the front end of the arc ignition mother rod, a number of arc ignition sub-rods are fixedly arranged in sequence along the axial direction of the arc ignition mother rod. Along the direction perpendicular to the axial direction of the arc ignition mother rod, an arc ignition needle is fixedly arranged on the arc ignition sub-rod. A number of arc ignition needles rotate clockwise or counterclockwise with the axis of the arc ignition sub-rod as the center. The arc ignition sub-rod includes a long rod portion and a short rod portion fixedly arranged at the front end of the long rod portion. The long rod portion of the arc ignition sub-rod located at the rearmost side is fixedly connected to the front end of the arc ignition mother rod, and the short rod portion of the arc ignition sub-rod located at the front side is fixedly connected to the long rod portion of the arc ignition sub-rod located at the rear side. The present invention is applicable to coating the inner wall of a pipe fitting. By designing the arc ignition sub-rods to rotate and progress at intervals along the axial direction of the arc ignition mother rod, sufficient spacing is provided between the arc ignition sub-rods, avoiding mutual interference or overheating between the arc ignition sub-rods and ensuring the coating quality.

To stably form an insulating film of high quality in a reactive ion plating apparatus and method.SOLUTION: In the reactive ion plating apparatus 10, an evaporation material 24 stored in a crucible 20 is heated and evaporated by an electron gun 22. In addition, the ionization power Wd is supplied to the crucible 20 as an anode and the hot cathode filament 34 that emits thermoelectrons as a cathode. Accordingly, the plasma 100 is induced. Further, the reactive gas is introduced into the vacuum chamber 12 through the hollow anode 46, and the hollow anode power Wh is supplied to the hollow anode 46. Accordingly, the hollow anode plasma 200 is induced. A hollow anode filament 48 is provided at a gas discharge port of the hollow anode 46. The hollow anode filament 48 becomes a stable anode by being heated by Joule heat.SELECTED DRAWING: Figure 1

The invention discloses a tantalum-doped nitride coating and a preparation method thereof. The preparation method comprises the following steps: 1) pretreating the surface of a substrate; (2) an arc ion plating mode is adopted, and a CrN transition layer with the thickness of 0.15-0.3 mu m is obtained through deposition on the surface of the base body through a Cr target; and (3) depositing on the CrN transition layer by using a CrAlSi target and a Ta target in an arc ion plating manner to obtain the CrAlTaSiN coating with the thickness of 2-3mu m. The tantalum-doped nitride coating disclosed by the invention is beneficial to increasing the Vickers hardness of the coating, enhancing the binding force of the coating and a matrix, and improving the room-temperature and high-temperature friction resistance of the coating.

The invention discloses a nitrogen-doped diamond-like coating, a preparation method of the nitrogen-doped diamond-like coating and a stirring head for friction stir welding, and belongs to the technical field of stirring heads for friction stir welding and diamond-like coatings of the stirring heads. The preparation method comprises the following steps that a stirring head for friction stir welding serves as a base body, the base body is sequentially subjected to grinding and polishing treatment, ultrasonic cleaning, drying treatment and ion source cleaning, and the pretreated base body is obtained; a carbon target is adopted as a reaction target material for arc ion plating, bias voltage is applied to the pretreated substrate during arc ion plating, arc current is set, filtering current is adjusted, and deposition is carried out; and during deposition, nitrogen is introduced in a pulse mode, and the nitrogen-doped diamond-like coating is prepared. According to the method, the technical problems that a film layer is insufficient in binding force and easy to fall off in a physical vapor deposition process can be solved, and the technical problems that the hardness of the film layer is low, the temperature in the film forming process is high, the friction coefficient is complex to adjust and the thermal stability is poor when the diamond-like carbon coating applied to the stirring head of friction stir welding is prepared by adopting a chemical vapor deposition process are solved.

The present invention provides a diamond-like carbon film chromatographic column, a preparation method thereof and uses thereof. The preparation method of the diamond-like carbon film chromatographic column is as follows: a ternary nano-composite coating formed by a metal element, an N element and a C element is formed on the inner wall of the chromatographic column by using a micro-arc ion plating technique. The chromatographic column of the present invention can effectively reduce the non-specific adsorption of target analytes sensitive to metals, obtain stable, effective and ideal analysis results, and at the same time does not affect the durability and convenience of the chromatographic column.

The utility model provides a super-hydrophobic matte composite coating which comprises an ABS (Acrylonitrile Butadiene Styrene) base material, and a bottom layer is electroplated on the surface of the ABS base material; a semi-bright nickel layer, a pearl nickel layer and a trivalent chromium layer are sequentially electroplated on the upper surface of the bottom layer of the ABS base material; under the vacuum condition, ion plating is carried out on the surface of the trivalent chromium layer of the ABS base material to form a silicon dioxide layer with the thickness of 10-20 nm. According to the super-hydrophobic matte composite coating and the shower head, the bottom layer is formed on the ABS base material through electroplating, the semi-bright nickel layer, the pearl nickel layer and the trivalent chromium layer are sequentially electroplated on the upper surface of the bottom layer, the silicon dioxide layer is formed on the surface of the trivalent chromium layer through vacuum ion plating, and the super-hydrophobic matte composite coating which is low in refractive index, high in light transmittance and good in water resistance is formed on the surface of the ABS base material. Meanwhile, a super-hydrophobic micro-nano structure layer in a diffuse scattering matte state is arranged, and a composite coating of the super-hydrophobic micro-nano structure layer has low surface energy and also has super-hydrophobic performance.

The application provides a high-precision current sampling, fault diagnosis and protection system for a vacuum ion coating power supply, comprising: an original perception module, which acquires a multi-channel original data set; a data purification module, which performs time alignment, compensation and correction on the multi-channel original data set to obtain a purified data set; a target current module, which acquires a target current data set by using a frequency band decomposition model; a state feature module, which constructs a state feature set based on the target current set; a fault judgment module, which performs fault level division and protection trigger judgment on the fault diagnosis result to obtain a final fault judgment result; and a protection execution module, which performs graded protection operation according to the final fault judgment result. The application can obtain full-band current reproduction, accurately distinguish switch noise and arc precursor, greatly reduce false touch, and thus realize accurate fault diagnosis and graded ladder protection.