351 results about "Plasma jet" patented technology

The invention discloses a system and a method for rapidly and efficiently decomposing ammonia to produce hydrogen through cooperation of plasma catalysis. Ammonia gas enters the normal-pressure arc temperature plasma reactor to form rotating gas flow, is ionized into high-activity plasma under the driving of high-voltage electricity, and is pushed by the rotating gas flow and a gradually-shrinking opening of the reactor to form large-area three-dimensional plasma jet flow, and jet flow gas upwards flows into a coaxial upper-layer catalytic area and downwards flows into a coaxial outer-layer catalytic area due to the limitation of a wall surface; and the reacted gas flows out from a gas guide hole at the lower part. Ammonia gas is firstly activated and pre-decomposed in the arc temperature plasma area and then secondarily decomposed in the coaxial catalytic area, heat of the temperature plasma area directly acts on the catalytic area, and external heating is not needed. The whole structure is that the temperature plasma area and the catalytic area are coaxially integrated, so that the waste heat utilization rate and the reaction energy efficiency are improved. The system is simple and compact in structure, can flexibly supply hydrogen in a distributed manner, is high in energy density, and can be directly driven by wind, light and green electricity.

The invention discloses a furnace end uniform in heating. The furnace end comprises a top plate, a bottom plate and a plurality of plasma combustors. A furnace chamber is defined by the top plate and the bottom plate. Due to the fact that the air inlet holes are formed in the radial direction, the position and size precision of the air inlet holes can be guaranteed by adopting a machine to pre-embed the needles and pull the needles, manual intervention is not needed, the labor cost is reduced, gas can directly impact the anode needles and take away part of heat generated by the anode needles, and a certain cooling effect on the anode needles is achieved; the electric arc generated between the anode needle and the cathode pintle is maintained in the axis space, so that direct interference or influence of airflow on the electric arc in the area is avoided; by arranging the cathode pintle, the plasma jet impacts the head of the cathode pintle and then is sprayed out in the radial direction, the energy of the plasma jet is dispersed in a larger range, the concentration ratio and the energy density of the jet are reduced, the phenomenon of local overheating is avoided, and uniform heating of cookware is achieved.

An alloy wheel is formed having a three dimensional configuration defining a face and recessed surfaces. The face of the wheel is machined providing a smooth surface at the face and defining an edge between the smooth surface of the face and the recessed surfaces. A nozzle element for projecting a plasma jet toward the wheel is provided. The plasma jet is projected toward the smooth surface of the face, the edge, and toward at least a portion of the recessed surfaces forming an alloy oxide at least on the face and the edge disposed between the face and the recessed surfaces. A first polymeric coating is applied over the face, the recessed surfaces and the edge disposed between the face and the recessed surfaces.

The utility model relates to the technical field of plasma paint spraying equipment, in particular to plasma paint spraying processing electromechanical equipment which comprises an equipment body, a spray gun adjusting mechanism and a spray gun body, the spray gun adjusting mechanism is arranged on the left side of the equipment body, the spray gun body is arranged on the left side of the spray gun adjusting mechanism, and a spray gun nozzle is fixedly connected to the left end of the spray gun body. According to the powder spraying device, through the arrangement of the powder conveying pipe, the powder outlet pipe, the confluence cover, the circulation sleeve and the small air pump, powder to be sprayed can be sprayed out in a dispersed mode through the powder conveying pipe and the powder outlet pipe, waste or pollution caused by the fact that the powder to be sprayed drifts away is prevented through the confluence cover, and the powder to be sprayed can be sprayed out in a dispersed mode. The airflow generated by the small air pump forms rotational flow through the circulation sleeve, the powder in the confluence cover is blown up, the powder is taken away by the plasma jet, and the device can limit the drifting range of the powder to be sprayed, so that the utilization rate of the powder to be sprayed is greatly improved, and the spraying efficiency is effectively improved.

The invention belongs to the technical field of microwave plasmas, and particularly relates to a magnetized atmospheric pressure pulse microwave plasma jet discharger. The discharger is reasonable in design, microwave energy is fed into the discharge chamber through the SMA interface, high electric field intensity is formed at the tip of the hollow needle electrode, and fed working gas is disrupted and discharged; a magnet exciting coil outside the quartz tube generates an axial magnetic field inside the quartz tube through direct current, electrons do spiral cycloid motion in an electromagnetic field, and electron cyclotron resonance can be achieved under the field. Through magnetic field constraint, high-energy electrons are constrained in a core area, a motion path is prolonged, effective collision times are increased, gas dissociation efficiency and ionization degree are improved, and collision loss of the electrons and a wall surface is reduced; the plasma jet performance is improved; the device works in an atmospheric pressure environment, does not need a vacuum system, reduces equipment cost and maintenance difficulty, reduces electrode sputtering and cavity corrosion, and prolongs the service life of core components.

The invention discloses a pulse modulation plasma jet generation method and application thereof, and particularly relates to the field of microelectronics, and the method comprises the following steps: I, constructing a multidisciplinary association database, modulating a high-voltage pulse power supply, and optimizing pulse waveform parameters at the same time; iI, pulse voltage is applied through a high-voltage electrode to generate plasma jet, a coupling simulation model is established, and the evolution process of the plasma jet is simulated; according to the method, the requirement of manual operation can be reduced, subjective deviation and information loss are avoided, the robustness of resisting environmental interference is improved, and the method can adapt to the high-speed and high-precision process requirement; the testing of invalid parameter combinations can be avoided, the searching capability is improved, the experiment or simulation frequency is reduced, the anti-interference capability of the jet system on working condition fluctuation is improved, and the maintenance frequency is reduced.

The invention discloses a CFD-DEM-based dense charging bed particle distribution calculation method under the action of plasma jet, and the method comprises the steps: employing a zero-dimensional mathematical physical model which comprises pulse circuit discharge, capillary ablation and plasma jet and generates plasma through capillary ablation; obtaining a curve fitting formula of the plasma jet temperature and pressure changing along with time; acquiring initial information of the dense charging bed; establishing a dense charging bed geometric model, setting geometric dimension parameters of the dense charging bed model, performing grid division, and establishing a dense charging bed plasma jet point fire transfer model in a CFD solver; establishing a particle model in a DEM solver; and coupling Fluent and Edem calculation software, carrying out transient calculation solution, and synchronously carrying out numerical calculation on the CFD solver to obtain simulation result data. According to the method, the instantaneous speed distribution of the particles moving in the medicine chamber and the final accumulation condition of the particles in the medicine chamber can be obtained.

The invention belongs to the field of surface icing resistance of metal materials, and particularly relates to a machining method of a surface icing-resistant microstructure. The anti-icing structure is prepared on the 30CrMnSiNi2A surface by using micro-milling and surface modification technologies, the operation is simple, the cost is low, the processing efficiency is higher, and the preparation of a large-area anti-icing surface of a material is expected to be realized. And meanwhile, the method is also suitable for preparing anti-icing structure surfaces of other materials. Atmospheric pressure cold plasma jet is adopted, localized modification is conducted on the material surface through the Rehbinder effect, and the machining quality and machining efficiency of the anti-icing structure are improved. And the modified surface is cut in time, so that the material characteristics of the anti-icing surface are not influenced, and the influence on the service performance of the material is avoided. The device is simple and easy to operate, small in space size and high in adaptability, when the device is used, only the plasma spray head needs to be aligned with a machining area, additional modification does not need to be conducted on a machine tool, and the production cost is reduced.

The invention discloses a plasma jet form control method, device, equipment and medium, according to the scheme, a deep learning model is utilized to establish a mapping relation between an electromagnetic parameter and a jet form, key characteristics such as a jet diffusion angle, length and temperature distribution can be predicted with high precision, and the regulation and control accuracy is remarkably improved; besides, through a closed-loop control process, sensor data acquisition, error analysis and dynamic regulation and control are combined, environment change and target form deviation are responded in real time, and the quick response capability of the regulation and control system is ensured.

The invention discloses a preparation method and application of crab shell chitin without chemical decolorization, and the preparation method comprises the following steps: crushing the crab shell of Eriocheir sinensis to obtain crab shell powder; dissolving crab shell powder in distilled water according to a ratio of 1: 10-1: 30 (w / v) to obtain a crab shell powder solution; treating the crab shell powder solution by using plasma jet (PJ), washing to be neutral, and drying to obtain plasma pretreated crab shell powder; dissolving the crab shell powder pretreated by the plasma into 0.1-3M hydrochloric acid (HCl) solution according to the ratio of (1: 10)-(1: 30) (w / v), and carrying out demineralization treatment; washing the demineralized solid matter to be neutral, performing deproteinization treatment by using 0.1-3M sodium hydroxide (NaOH) solution, washing to be neutral, and drying to obtain white solid crab shell chitin. In the extraction process of the crab shell chitin, a strong oxidant (such as H2O2) is not required to be used for decoloring, the color is close to that of commercial chitin, and the process is simple, green and environment-friendly; meanwhile, the production cost is reduced.

The utility model discloses a pre-treatment promoting device for fruits with waxy epidermis, which adopts a cold plasma jet device to release jet cold plasma to an objective table, so as to change charge distribution on the waxy epidermis surface by using a variable electric field and generated free radicals and free electrons in the discharge process of the jet cold plasma. Meanwhile, due to the etching effect of jet flow cold plasma treatment, wax on the epidermis of the fruits with wax on the epidermis is broken, a new moisture diffusion channel is formed, and therefore the diffusion rate and quality of the moisture of the fruits in the drying process are improved. The device is suitable for pre-treatment of fruits with waxy epidermis, has the advantages of rapid and efficient dehydration and drying and continuous drying promotion treatment of the fruits, is simple and convenient to operate, mild in condition, green and safe, remarkable in drying promotion effect, high in treatment speed and more environment-friendly, gets rid of dependence of dipping and drying promotion by using a chemical drying promoter at present, and has a wide application prospect. The drying quality and the eating safety of the fruits with waxy epidermis are improved.

The invention relates to the technical field of cutting equipment, and provides heat exchanger tube nest numerical control cutting equipment and a high-precision cutting method.The heat exchanger tube nest numerical control cutting equipment comprises a base, a first supporting plate, a second supporting plate and a third supporting plate are arranged on the base in the length direction of the base, and the first supporting plate is slidably connected to the base; the second supporting plate and the third supporting plate are both fixed to the base. According to the vertical cutting device, a second rotating disc is accurately controlled to rotate through a third driving mechanism, the second rotating disc rotates to drive a stop lever to move in a limiting groove, a support is pushed to rotate with a third hinged shaft as the center, and the spraying direction of a plasma spraying gun is tangent to the tube wall of the tube nest; when plasma is cut, a reflecting surface is formed on the inner wall of the other side, so that plasma hedging is caused, the plasma beam is jetted in the tangential direction through tangent angle cutting, the hedging phenomenon is avoided, the cutting gap is controlled, and the cutting precision is improved compared with a traditional mode.

The invention discloses a high-efficiency furnace end and an electric flame stove. The high-efficiency furnace end comprises an upper shell, a lower shell and a plurality of anode needles arranged between the upper shell and the lower shell, the upper shell is provided with a plurality of cathode tubes corresponding to the anode needles, and upper ceramic tubes are arranged below the bottoms of the cathode tubes; the lower shell is provided with a plurality of arc striking pieces corresponding to the anode pins, lower ceramic tubes are arranged on the outer sides of the arc striking pieces, and the tops of the lower ceramic tubes abut against the bottoms of the upper ceramic tubes. Two discharge areas are arranged, the avalanche effect of secondary ionization is formed, extremely high temperature plasma jet is finally formed, and efficient heat transfer is achieved; the cathode tube, the upper ceramic tube, the anode needle and the lower ceramic tube of each group are connected in an abutting manner, and finally, the plasma accessory is stabilized by utilizing the tightening force between the upper shell and the lower shell, so that the mounting and dismounting efficiency is improved, the complexity of mounting and reworking or overhauling is reduced, and the cost is effectively controlled.

The invention relates to the technical field of zinc-based material powder additive manufacturing, in particular to a zinc-based material powder additive manufacturing system and a manufacturing method thereof.The zinc-based material powder additive manufacturing method comprises the following steps that zinc-based alloy powder is obtained and subjected to surface activating treatment through plasma jet; determining cold spraying process parameters based on the oxygen content of the activated powder; cold spraying-laser composite deposition is executed, and compact green bodies are formed on the substrate layer by layer; and the metallurgical bonding state between deposits is determined, and selective laser remelting is triggered to eliminate interface defects. According to the method, a composite oxide layer is generated on the surface of the powder through Ar-mixed gas and plasma jet treatment with the power of 8-12 kW, excessive oxidation can be prevented, the powder activity can be improved, and a good foundation is laid for subsequent spraying deposition.

An alloy wheel is formed having a three dimensional configuration defining a face and recessed surfaces. The face of the wheel is machined providing a smooth surface at the face and defining an edge between the smooth surface of the face and the recessed surfaces. A nozzle element for projecting a plasma jet toward the wheel is provided. The plasma jet is projected toward the smooth surface of the face, the edge, and toward at least a portion of the recessed surfaces forming an alloy oxide at least on the face and the edge disposed between the face and the recessed surfaces. A first polymeric coating is applied over the face, the recessed surfaces and the edge disposed between the face and the recessed surfaces.

The invention relates to a method for treating a reflective optical element (1) for the VUV wavelength range having an aluminum surface (3). The treatment of the reflective optical element (1) comprises irradiating the reflective optical element (1) with a hydrogen plasma jet (10) to remove the aluminum oxide layer (4) formed on the aluminum surface (3). The invention also relates to a reflective optical element (1) for use in the VUV wavelength range treated by such a method, and to an optical arrangement comprising at least one such optical element (1).

The invention provides a core-shell structure powder preparation method which comprises the following steps: in a reaction chamber in an inert gas atmosphere, melting a metal raw material by using plasma jet, and crushing the molten metal raw material into metal powder which is a metal core of a core-shell structure. And meanwhile, precursor gas is introduced into the reaction chamber, so that the precursor gas is cracked under the combined action of high-energy plasma, high temperature, metal surface catalysis and the like and is recombined into a deposition layer on the surface of the metal core, and the core-shell structure powder with the metal core inside and the deposition layer outside is obtained at the moment. According to the core-shell structure powder preparation method provided by the invention, the gas is used as a precursor material, and under the combined action of the high-energy plasma and the high-temperature metal, the precursor gas can immediately complete cracking deposition of the shell material while melting and crushing the metal raw material through plasma jet, so that the deposition efficiency is high; and in addition, the gaseous precursor is relatively high in purity, so that the metal powder can be effectively prevented from being oxidized.

The invention provides a plasma virtual control surface and control mechanism control distribution method for reentry flight of a high-speed aircraft. The method comprises the following steps: firstly, determining that the aircraft enters a reentry flight stage; secondly, the needed torque is calculated according to an attitude controller; then designing control distribution models of a plasma active flow control system, a pneumatic control surface control mechanism and an RCS backstepping control system based on a depth deterministic strategy gradient reinforcement learning algorithm; and the high-speed aircraft completes reentry flight based on the control distribution parameters obtained by the control distribution model. Auxiliary control is achieved through the plasma jet, and a new way is provided for accurate control over the aircraft. According to the method, control means can be reasonably distributed according to the early stage, the middle stage and the later stage of reentry flight, and relevant parameters of all control systems are determined. The reinforcement learning algorithm is used for processing the nonlinear characteristics of the input power and control output of the plasma exciter and the nonlinearity and uncertainty of aerodynamic characteristics in an attitude control model, the stability of a control system can be improved, and the method has a good application prospect.

The utility model discloses a high-efficiency furnace end and an electric flame stove. The high-efficiency furnace end comprises an upper shell, a lower shell and a plurality of anode needles arranged between the upper shell and the lower shell, the upper shell is provided with a plurality of cathode tubes corresponding to the anode needles, and upper ceramic tubes are arranged below the bottoms of the cathode tubes; the lower shell is provided with a plurality of arc striking pieces corresponding to the anode pins, lower ceramic tubes are arranged on the outer sides of the arc striking pieces, and the tops of the lower ceramic tubes abut against the bottoms of the upper ceramic tubes. According to the utility model, the two discharge areas are arranged to form an avalanche effect of secondary ionization, and finally an extremely high temperature plasma jet is formed, so that efficient heat transfer is realized; the cathode tubes, the upper ceramic tubes, the anode needles and the lower ceramic tubes of each group are connected in an abutting manner, and finally, plasma accessories are stabilized by utilizing tightening force between the upper shell and the lower shell, so that the mounting and dismounting efficiency is improved, the complexity of mounting and reworking or overhauling is reduced, and the cost is effectively controlled.

The application discloses a kind of plasma jet array devices for large size epoxy surface modification, including frame, tank, gas cylinder for loading inert gas, aperture network, high voltage power supply and metal insert;Tank and metal insert are fixed on frame, tank is flat tank and its slot is formed with jet airway for placing and fixing epoxy insulation, the bottom and side of tank are provided with jet spout arranged in array, jet spout is connected by gas inlet pipe, gas inlet pipe is arranged in the inside of side plate and bottom plate of tank;Aperture network is connected on jet spout and connects high voltage power supply, tank is grounded by wire;Metal insert is inserted above epoxy insulation, metal insert is grounded by wire.The application also discloses the use method applied to the above device.Adopting the application, the surface of large size epoxy insulation can be quickly and uniformly modified, and the charge release capacity is improved.

The invention belongs to the technical field of combustion equipment, and relates to a plasma ignition system and a using method thereof. The system comprises a plasma generator, a combustor, a power supply system, a carrier working medium system and a cooling water system, an anode and a cathode of the plasma generator are coaxially arranged to form an electric arc cavity and a surrounding cooling water cavity, and the anode is provided with a compressed air inlet and a plasma jet outlet; the plasma combustor is sequentially and coaxially sleeved with a first-stage center cylinder, a second-stage combustion cylinder and an outer wall cylinder from inside to outside, the first-stage center cylinder communicates with the jet flow outlet, and the outer wall cylinder is provided with a pulverized coal inlet; the power supply system supplies power to the generator through the isolation transformer and the rectifier cabinet. The carrier working medium system supplies air to the compressed air inlet; the cooling water system enables demineralized water to circulate in the cooling water cavity. Efficient and stable ignition and low-nitrogen combustion of pulverized coal are achieved, the ignition reliability is remarkably improved, the system service life is remarkably prolonged, and the operation automation level is remarkably improved.

The present application relates to a kind of catalyst synergistic plasma to regulate the method of active substance content in plasma activated water, belong to plasma activated water preparation technical field.The present application uses catalyst synergistic plasma to prepare the device of activated water, catalyst is filled in the discharge region of dielectric barrier discharge plasma jet device, the working gas flow of inlet pipe is adjusted by mass flowmeter, low-temperature plasma power is powered to high-voltage electrode, working gas starts discharge to generate plasma in discharge region, while, under the coupling catalysis of catalyst, the content of active substance in plasma is improved, the water body in plasma active substance activated water storage container is activated, and plasma activated water is formed;The content of active substance in plasma activated water is regulated by changing catalyst type and the component of working gas in gas cylinder.The present application improves the content of active substance in plasma working gas by catalyst coupling plasma, and the content of active substance in plasma activated water is improved.

This invention discloses a portable low-temperature plasma device based on a Laval nozzle structure and its application, belonging to the field of plasma technology application technology. Specifically, it includes (1) the construction of the device; and (2) the use of the device for fungal eradication treatment and transdermal drug delivery enhancement treatment. The beneficial effects achieved by this invention are as follows: This invention is the first to apply the Laval nozzle structure to a portable low-temperature plasma device. The results show that the device can effectively improve the plasma jet performance and active particle content, significantly improve the treatment effect of fungal infections of the skin and nails and the transdermal drug penetration efficiency, while solving the problems of large size, reliance on external power supply, and complex operation of traditional plasma devices. Therefore, using this invention for the treatment of fungal infections of the skin and nails and for enhanced transdermal drug delivery has advantages such as ease of operation, high safety, non-invasiveness, and high efficiency, and thus has potential application prospects in the field of skin disease treatment and transdermal drug delivery.

The invention discloses a contact arcing generator, a water plasma igniter and an ignition method, and belongs to the technical field of aircraft igniters. A contact arcing generator comprises a generating device and a sliding mechanism, the generating device comprises a cathode and an anode which are coaxially arranged, the anode is located outside the cathode, and the sliding mechanism is located outside the anode and drives the cathode to slide in the anode; the cathode comprises a body part and an arcing end, the arcing end is located at the top end of the body part, the sliding mechanism drives the arcing end to make contact with or be separated from the anode through the body part, an arcing cavity is formed between the anode and the top end of the cathode, a conveying structure for conveying water to the arcing cavity is arranged on the cathode, a spraying hole is formed in the anode, and the spraying hole communicates with the arcing cavity. Water vapor in the arcing cavity is sprayed out through the spraying holes to form water plasma jet flow. By the adoption of the contact arcing generator, the water plasma igniter and the ignition method, the problem that an existing plasma igniter is unstable in arcing can be solved.

The present invention relates to a simulation device for non-destructive and rapid de-icing of a fan blade, which includes a self-controllable charge-discharge circuit, a trigger discharge circuit, and a jet array integration device composed of a plurality of shock wave jet cavities arranged in a dense array. A single shock wave jet cavity in the jet array integration device is clamped by an adaptive screwing clamping device, and a reverse clamping arm device for moving along the fan blade is arranged around the jet array integration device; the shock wave jet cavity is a two-stage surface-connected structure, composed of a primary cavity and a secondary cavity. The primary cavity is composed of a needle electrode, polytetrafluoroethylene, and an intermediate electrode, and the secondary cavity is composed of the intermediate electrode, polytetrafluoroethylene, and a ground electrode. The present invention adopts a de-icing method based on plasma jet to break the ice layer at a specified position. The shock wave jet cavity can repeat and continuously jet de-icing in a short time, and the rapid de-icing based on the heat transfer of the plasma and the action of the shock wave avoids damage to the fan blade.

The application belongs to the field of jet exciter, and particularly relates to a multi-mode exciter and a use method, which comprises an exciter body, an electrode group, a power supply and a vibrating diaphragm; the exciter body is provided with a mounting cavity, the vibrating diaphragm is arranged in the mounting cavity and divides the mounting cavity into two mutually isolated jet cavities, and each jet cavity is provided with a jet hole; each jet cavity is provided with a group of electrode groups, the electrode group comprises a moving electrode and a fixed electrode, the moving electrode is arranged on the vibrating diaphragm, and the fixed electrode is arranged on the inner wall of the exciter body; the power supply comprises a control power supply and a discharge power supply. The multi-mode exciter provided by the application combines the vibrating diaphragm jet and the two-electrode plasma jet, can greatly improve the jet strength, provide multiple jet modes and provide a vector control function, meet the requirements in a larger range, and improve the adaptability of the exciter.

A method for processing a substrate includes loading the substrate on a substrate holder coupled to a scanning tool and disposed in a processing chamber, the substrate including an etch mask disposed over an underlying layer. The method further includes orienting, using the scanning tool, the substrate holder relative to a plasma torch at a tilt angle, the plasma torch being disposed in the processing chamber and including a plasma nozzle, the tilt angle being an angle between the plasma torch and a normal direction of the substrate holder. And the method further includes generating, using the plasma torch, a plasma jet over an area of the substrate holder, and scanning, while maintaining a distance between an end of the plasma nozzle and a surface of the substrate, the substrate relative to the plasma jet to form features on the underlying layer at the tilt angle.

The application relates to the technical field of plasma, in particular to a processing device for coaxial pulse trapezoidal magnetic field regulated plasma jet, which comprises a gas-liquid control module, a plasma generation module, a pulse trapezoidal magnetic field generation module, a power excitation module, a synchronous controller and a plasma processing module; the pulse trapezoidal magnetic field generation module is connected with the plasma generation module and is used for generating a coaxial pulse trapezoidal magnetic field with adjustable parameters; the radial component of the coaxial pulse trapezoidal magnetic field is perpendicular to the movement direction of charged particles in the plasma jet, the plasma jet is provided with a radial expansion or contraction Lorentz force, and the processing area of the plasma jet is adjusted. The device provided by the application generates a stable, dispersed, gas-temperature-near-room-temperature and adjustable-action-area plasma jet, realizes efficient, accurate and low-energy-consumption processing of a target object, and achieves good processing effect.

This invention proposes a metal matrix composite material processing apparatus and method based on plasma etching, belonging to the field of composite material processing. It determines the material properties, target processing method, and final service performance requirements of the metal matrix composite workpiece. The workpiece consists of a metal matrix and reinforcing particles dispersed within the metal matrix. The area to be processed on the workpiece is exposed to a plasma jet, and plasma etching is used. The reinforcing particles react and transform into volatile gases, which are then removed from the metal matrix, forming a softening pretreatment layer on the workpiece surface. Ultrasonic vibration cutting is then used to remove the softening pretreatment layer. This invention removes the reinforcing particles from the metal matrix through plasma etching, locally transforming the originally heterogeneous and difficult-to-process composite material into a relatively homogeneous metal layer for cutting. This achieves homogeneous transformation of the processed object, eliminating the core mechanisms of particle pull-out, breakage, and interface cracking in traditional processing.

The invention relates to a device for improving the through-flow arc control of a high-voltage large-capacity gas gap switch, and the device comprises a test cavity which is used for providing a controllable gas insulation environment and serves as a carrier of a high-voltage large-current discharge test; the trigger discharge loop is used for generating a high-voltage pulse to drive the trigger cavity to generate plasma jet and induce the main gap to be broken down and conducted at a preset moment; and the large current generation loop is used for storing energy and generating a high-energy fault current simulating an actual working condition after the main gap is conducted. A main gap can form a stable and controllable initial discharge channel under high-voltage and large-gap conditions, active constraint is carried out on an arc movement track in a high-energy fault current flowing stage, and long-term residence of an arc root in a local area of an electrode is avoided, so that the ablation degree of the electrode is remarkably reduced, the through-flow life is prolonged, and meanwhile, the service life of the electrode is prolonged. A transverse magnetic field generated by the spiral groove structure enables an electric arc to rotate along the surface of the electrode, the stability of an arc column is effectively improved, and the reliability under the condition of large current flow is improved.