91 results about "Ceramic knife" patented technology

The invention discloses a preparation method of a textured ceramic cutting tool, and belongs to the technical field of ceramic cutting tools. According to the preparation method, a ceramic core rod is prepared preferentially, the ceramic core rod is placed in a circular truncated cone cavity, long-strip-shaped beta-silicon nitride whiskers are added into ceramic slurry of the ceramic core rod, the ceramic slurry slowly flows into the circular truncated cone cavity under the action of gravity, and the circular truncated cone cavity slowly rotates and is slowly far away from the ceramic core rod; the motion of the circular truncated cone cavity body relative to the ceramic core rod is oblique motion, the ceramic core rod slowly covers the surface slurry to be thickened under the action of the oblique speed of the circular truncated cone cavity body, most of the long-strip beta-silicon nitride whiskers are distributed in the same motion direction under the motion, and the effect of texturing the outer structure of the ceramic cutter is achieved.

The invention belongs to the field of ceramic cutters, and discloses a high-entropy carbide-high-entropy carbonitride ceramic cutter as well as a preparation method and application thereof. The ceramic cutting tool comprises a tool nose high-entropy carbide (Ti0. 2Zr0. 2Nb0. 2Ta0. 2W0. 2) C and a rear tool face high-entropy carbonitride (Ti0. 2Zr0. 2Nb0. 2Ta0. 2W0. 2) CxN1-x (x is more than or equal to 0.1 and less than or equal to 0.9), the preparation method comprises the following steps of: pressurizing carbide mixed powder of TiC, ZrC, NbC, TaC and WC and carbonitride mixed powder of TiC, ZrC, NbC, TaC, WC, TiN, ZrN, NbN, TaN, WN and Ni powder to 30-50 MPa in a vacuum environment, and carrying out spark plasma sintering at 1600-1800 DEG C to obtain the TiC / NbC / TaC / WC composite material. The tool nose of the ceramic tool has high hardness, the rear tool face has high toughness and wear resistance, and the ceramic tool can be applied to continuous cutting of high-hardness materials.

The invention discloses a three-dimensional graphene-carbon fiber network and double-phase high-entropy alloy synergistic strengthening and toughening ceramic cutter material as well as a preparation method and application thereof. The material is prepared from the following components in parts by mass: 87.8 to 90.9 parts of aluminum oxide, 8 to 10 parts of AlCoCrFeNi five-element equal-atomic-ratio high-entropy alloy, 1 to 2 parts of carbon fiber and 0.1 to 0.2 part of graphene. The preparation method comprises the steps of preparation of graphene grafted carbon fibers, preparation of AlCoCrFeNi high-entropy alloy powder, preparation of aluminum oxide-high-entropy alloy-graphene grafted carbon fiber composite ceramic powder and spark plasma sintering. The ceramic cutting tool material is used for preparing high-speed cutting tools. According to the preparation method, a plastic toughening mechanism of a double-phase high-entropy alloy is organically combined with a multi-stage toughening effect of a three-dimensional graphene-carbon fiber network, and a composite ceramic material with high hardness and high fracture toughness is obtained through spark plasma sintering, so that the adaptability of a cutter under a high-speed cutting condition is remarkably improved, and the service life of the cutter under the high-speed cutting condition is remarkably prolonged.

The present invention provides an integrated ceramic tool with thermistor temperature measurement and cutting functions and a preparation method thereof, which comprises a thermosensitive layer and a ceramic matrix layer; the thermosensitive layer is formed by sintering a temperature measurement material and an additive; the ceramic matrix layer is formed by sintering a matrix material, a binder and a reinforcing phase. The preparation method is to make the powders of each layer of materials, lay and compact the powders of each layer of materials layer by layer in sequence, and finally carry out spark plasma sintering (SPS). The present invention further discloses the application of the tool. By selecting temperature-sensitive materials and designing the tool structure, the present invention enables the obtained ceramic tool to meet the requirements of tool performance in industrial production in terms of Vickers hardness, flexural strength and fracture toughness, and realizes the cutting function of the ceramic tool and the real-time measurement of the cutting temperature during the cutting process.

The invention relates to the technical field of preparation of ceramic cutters for electrical porcelain fettling, and discloses a preparation method of a precisely formed ceramic cutter for electrical porcelain fettling, the method comprises the following steps: weighing raw materials according to mass percentage, the raw materials comprising Al2O3, clay, CaCO3, an additive 1 and an additive 2; mixing the weighed raw materials, deionized water and ballstone according to a specific mass ratio, and putting the mixture into a ball milling tank for full ball milling to obtain ceramic slurry; slowly injecting the prepared ceramic slurry into a mold, standing, demolding, drying a demolded cutter blank in the shade at a specific temperature, and polishing, modifying and removing burrs after drying in the shade to obtain a to-be-sintered blank; and putting the obtained to-be-sintered blank into a box-type furnace, heating to a sintering temperature according to a specific heating rate, carrying out heat preservation, then cooling according to a segmented cooling rate, and finally, carrying out furnace cooling to obtain the precisely-formed electric porcelain fettling ceramic cutter. According to the invention, the fluidity of the Al2O3-based ceramic slurry and the mechanical property of the cutter are improved, and the precise forming effect of the electroceramic fettling cutter with a complex structure is met.

The application discloses a device for preparing a textured ceramic cutter and belongs to the technical field of ceramic cutting tools. The device is characterized in that a ceramic core rod is placed in a circular table cavity, long strip beta-silicon nitride whiskers are added into ceramic slurry of the ceramic core rod, the ceramic slurry slowly flows into the circular table cavity under the action of gravity, the circular table cavity slowly rotates and slowly moves away from the ceramic core rod, the movement of the circular table cavity relative to the ceramic core rod is oblique movement, the ceramic core rod slowly covers the surface slurry under the action of the oblique speed of the circular table cavity, and the long strip beta-silicon nitride whiskers mostly present the same movement direction under the movement, so that the effect of texturing the outer structure of the ceramic cutter is achieved.

The application relates to the technical field of ceramic cutter production, and particularly discloses a high-strength ceramic cutter production process, which comprises the following steps: S1, whisker directional pretreatment; S2, ceramic base body mixing; S3, binder preparation: polyvinyl butyral is dissolved in anhydrous ethanol to form a solution, titanium ester coupling agent NDZ-201 is added, constant-temperature stirring is carried out until the solution is transparent and uniform, and a composite binder is obtained; S4, freeze-drying granulation: mixed powder and the composite binder are mixed, anhydrous ethanol is added, slurry is formed after stirring, the slurry is injected into a mold, freezing is carried out, drying is carried out in a freeze dryer, and the granulation powder is obtained by crushing and sieving; S5, gradient hot-pressing sintering: the granulation powder is loaded into a graphite mold and sintered in a vacuum hot-pressing furnace; and S6, laser surface strengthening: the sintered body is placed on a pulse laser processing platform, and a laser is used to perform laser cladding treatment on the cutter edge area.

The application discloses a device for additive manufacturing gradient ceramic cutters, which comprises a control cabinet, a robot, a laser generator, a powder feeder, a water cooling system, a display, a protective gas cylinder, a laser measuring device, an operating room, a base plate and a laser head. Meanwhile, the application discloses a method for additive manufacturing gradient ceramic cutters: I. preliminary preparation; II. determining an additive path; III. preparation before additive manufacturing; IV. additive manufacturing of a cutter handle; V. additive manufacturing of a cutter blade; VI. finishing of the cutter. When the device works, the laser head performs additive manufacturing according to the set additive path, and a near-net-shaped cutter is quickly obtained, so that the rapid batch manufacturing of the cutter is realized. When the cutter blade is subjected to additive manufacturing, the powder conveyed by the powder feeder is mixed powder of ceramic particles and metal particles with different proportions, so that the cutter blade has different contents of ceramic particles from the two sides to the center, and the cutter blade has sufficient wear resistance and toughness and certain hardness.

The present invention discloses a high-entropy composite toughened gradient ceramic tool material and its preparation method and application, belonging to the technical field of ceramic tool materials. It has a symmetrical five-layer structure, which is a surface layer, a transition layer, a core layer, a transition layer and a surface layer in order; by mass, the surface layer includes 85-91 parts of aluminum oxide and 9-15 parts of high-entropy carbide; the transition layer includes 82.8-90.8 parts of aluminum oxide, 6-12 parts of high-entropy carbide, 3-5 parts of zirconium dioxide, and 0.2 parts of graphene; the core layer includes 82-91 parts of aluminum oxide, 3-9 parts of high-entropy carbide, and 6-9 parts of high-entropy alloy. The thermal stress relief and surface residual compressive stress characteristics of the gradient structure are organically combined with the various toughening mechanisms introduced by the high-entropy composite of graphene, and a high-hardness, high-toughness, high-entropy composite toughened gradient ceramic tool material is obtained through liquid phase + solid phase two-step sintering, which significantly improves the adaptability and resistance of the tool to high-speed cutting.

The invention discloses a kitchen storage knife rest and a kitchen knife set. The kitchen storage knife rest comprises a knife rest body and a clamping piece. The tool rest body is provided with a tool bit inserting groove and a guide containing groove, the tool bit inserting groove penetrates through the tool rest body in the height direction of the tool rest body, and the guide containing groove communicates with the tool bit inserting groove. The clamping piece is arranged in the guide containing groove in a sliding mode. When the tool bit of the tool is located in the tool bit inserting groove, the clamping piece and the groove wall of the tool bit inserting groove jointly clamp the tool bit of the tool under the action of gravity. Due to the fact that a clamping mechanism does not depend on magnetic adsorption, but depends on mechanical contact and gravity compression, the kitchen storage knife rest can be compatible with knives made of various materials, including knives made of non-ferromagnetic or weak magnetic materials such as ceramic knives, titanium alloy knives and high-carbon stainless steel knives, the application range of the kitchen storage knife rest is remarkably widened, and the universality of the kitchen storage knife rest is remarkably improved.

The invention discloses a preparation method and application of binding-phase-free, high-toughness and self-toughening WC-based composite ceramic applied to the field of high-speed cutting, and belongs to the technical field of ceramic materials. The invention aims to break through the technical problems that the transition metal carbide is difficult to sinter and densify and low in fracture toughness. The method comprises the following steps: 1, preparing composite powder; and 2, putting the fully mixed composite powder into a mold, and then putting the mold into a discharge plasma sintering furnace for sintering to obtain the WC-based multiphase ceramic. According to the method, transition metal and carbon are subjected to reactive sintering to generate plate-shaped WC crystal grains, in-situ self-toughening of a cutter material is achieved, the phenomena of deflection, bridging and the like occur in the crack propagation process, the crack propagation energy is consumed, and therefore the strength and toughness are remarkably improved; the invention avoids introduction of a binding phase which is low in melting point and easy to soften at high temperature, develops a novel design and preparation method of the ceramic cutter material for high-speed cutting, and has important significance for the ceramic cutter material for high-speed cutting.

The invention discloses a boron carbide composite ceramic tool bit and a preparation method thereof. The boron carbide composite ceramic tool bit comprises a tool bit body and a welding transition body, the tool bit body is internally provided with a boron carbide ceramic framework with a three-period minimal curved surface topological structure, three-dimensional communicating holes of the framework are filled with a metallic bond and diamond abrasive particles, and the welding transition body is a pure metallic bond transition layer. A hard wear-resistant phase is arranged on the outer surface of the combination body. The method comprises the following steps: constructing a boron carbide ceramic skeleton with a pore surface micro-nano diversion trench through additive manufacturing, and depositing an electromagnetic sensitive phase; injecting the powder into the three-dimensional communicated pores and assembling a green body; applying mechanical oscillation pressure and a high-frequency alternating electromagnetic field at the sintering temperature, and inducing an in-situ metallurgical reaction by utilizing local joule heat generated by a skin effect to finish densification sintering; and a surface hard wear-resistant phase is generated through chemical heat treatment or component in-situ reaction. Compact interlocking of the internal structure is achieved, the service life of the tool bit is prolonged, and the welding strength of the tool bit is improved.

The invention discloses a device for preparing a textured ceramic cutting tool, and belongs to the technical field of ceramic cutting tools. A ceramic core rod is placed in a circular truncated cone cavity, long-strip-shaped beta-silicon nitride whiskers are added into ceramic slurry of the ceramic core rod, the ceramic slurry slowly flows into the circular truncated cone cavity under the action of gravity, the circular truncated cone cavity slowly rotates and is slowly away from the ceramic core rod, and the circular truncated cone cavity obliquely moves relative to the ceramic core rod. The ceramic core rod slowly covers the surface slurry to be thickened under the action of the oblique speed of the circular truncated cone cavity, most of the long-strip beta-silicon nitride whiskers are distributed in the same movement direction under the movement, and the texturing effect of the outer structure of the ceramic cutter is achieved.

The ceramic cutter convenient to clean comprises a cutter handle and a cutter head, a mounting groove corresponding to the cutter head is formed in the cutter handle, a handle is arranged outside the cutter handle, a movable frame is connected to the top of the cutter head in a sliding mode, and scraping strips are connected to the two sides of the inner wall of the movable frame in a rotating mode. A positioning frame is fixedly connected to the top of the end, close to the tool bit, of the tool handle, a positioning pin is in threaded connection with the top of the positioning frame, an anti-skid pad is fixedly connected to the top of the tool back of the tool bit, a tool holder is fixedly connected to the tail end of the tool bit, and the tool holder is inserted into the mounting groove and fixed to the mounting groove through a bolt. The knife handle, the knife head and the scraping strip are matched with one another, the movable scraping strip is arranged at the top of the knife head, residual dishes attached to the knife can be conveniently cleaned through the scraping strip, a user does not need to make direct contact with the knife face through the hand, and the use safety of the knife is greatly improved.

The invention discloses a manufacturing method of a non-cohesive gel ceramic knife, which comprises the following steps: 1) preparing slurry, namely putting nanoscale yttrium-stabilized zirconia powder, a dispersing agent, an adhesive, a plasticizer and a solvent into a ball-milling tank for mixing and ball-milling to prepare the slurry; 2) tape casting: carrying out tape casting on the slurry to prepare a raw membrane; (3) isostatic pressing treatment: covering the upper surface and the lower surface of the raw diaphragm with release paper with the surface roughness Ra of 3-5 microns, putting the raw diaphragm into a sealing bag for vacuumizing treatment, then carrying out isostatic pressing treatment to form the roughness of the release paper on the surface of the raw diaphragm, and separating the sealing bag and the release paper from the raw diaphragm after isostatic pressing treatment; (4) pre-cutting: cutting the raw diaphragm subjected to isostatic pressing treatment into a blade shape; 5) degumming: feeding into a degreasing furnace for degumming; 6) sintering: sintering in a sintering furnace; and (7) edging is conducted, specifically, a rough grinding wheel is used for edging, and a rough edge face and a sawtooth-shaped cutting edge are formed. The manufactured ceramic cutting tool is good in anti-sticking effect, compact and uniform in blade and high in strength.

The invention belongs to the technical field of ceramic material preparation, and particularly relates to a preparation method of a TiC particle / Al2O3 ceramic cutter. According to the method, TiC particles, nanoscale Al2O3 powder and MgO powder are used as raw materials, and the ceramic is prepared through the processes of ceramic mixed powder preparation, blank preparation through oscillation pressure sintering, grinding and polishing and blank forging and pressing through oscillation pressure. According to the TiC particle / Al2O3 ceramic cutter prepared by the method, the grain boundary is further strengthened and the dislocation density in the grains is increased while the fine grain hardening effect is maintained, so that the bending strength and the fracture toughness of the material are enhanced while a sample is maintained in a high-hardness region.

The invention discloses a fixed semiconductor wafer cleavage device, which is provided with a scribing device and a splitting device, the two parts are respectively provided with a fixing mechanism and a processing mechanism and can move along a guide rail, a wafer mounting mechanism is arranged in the middle of the cleavage device, and a wafer is fixed on the wafer mounting mechanism through a wafer ring. The scribing fixing mechanism carries out vacuum adsorption, the scribing machining mechanism carries out scribing on the wafer at the designated position of the wafer, the wafer fixing mechanism supports the wafer at the lower portion of the wafer mounting mechanism, and a ceramic knife of the wafer machining mechanism is aligned with the back of a wafer scratch and presses downwards, so that the wafer is cleaved and broken along the scratch. Therefore, the semiconductor cleavage automatic processing of the fixed wafer is realized.

The application discloses a preparation method of a textured ceramic cutter and belongs to the technical field of ceramic cutting tools. The method comprises the following steps: preferentially preparing a ceramic core rod; placing the ceramic core rod into a circular table cavity; adding long strip beta-silicon nitride whiskers into ceramic slurry of the ceramic core rod; and slowly flowing the ceramic slurry into the circular table cavity through gravity, slowly rotating and moving away from the ceramic core rod, and moving the circular table cavity relative to the ceramic core rod in a slanting manner. The ceramic core rod slowly covers the surface slurry and thickens under the action of the slanting speed of the circular table cavity, and the long strip beta-silicon nitride whiskers are mostly distributed in the same movement direction under the movement, so that the effect of texturing the outer structure of the ceramic cutter is achieved.

The invention discloses a high-hardness antibacterial ceramic cutter material which is prepared from the following raw materials in parts by weight: 25-35 parts of nano AlN, 25-35 parts of nano silicon carbide, 15-25 parts of nano chitin, 1-3 parts of Gy2O3, 3-4 parts of LaO, 5-8 parts of sodium fluoride, 3-4 parts of Y2O3, 1-3 parts of aluminum oxide, 3-4 parts of kaolin, 2.1-3.1 parts of titanium oxide, a proper amount of deionized water, 0.8-1.3 parts of tung oil, 1.3-1.6 parts of polyethylene glycol, a proper amount of ethylene glycol and 3.8-5 parts of a performance optimizing agent. The ceramic material disclosed by the invention has extremely high hardness, wear resistance and antibacterial property, is excellent in comprehensive performance, can be used as a kitchen knife material or an industrial cutter material, and is high in cost performance; by using the nano chitin, the antibacterial property and toughness of the ceramic material are enhanced; by using the performance optimizing agent provided by the invention, the surface smoothness and the comprehensive performance of the ceramic are further improved.

The invention relates to a wear part (1) for a mill, in particular a grinding roller or a grinding plate. The wear part (1) comprises a metal casting material (2) and at least one porous ceramic insert (3). The at least one porous ceramic insert (3) is embedded in the metal casting material (2) and infiltrated thereby. The at least one porous ceramic insert (3) has at least one conical or tapering recess (6). The invention also relates to a mill, to a method for producing a wear part (1) of a mill, and to the use of ceramic inserts (3) in a wear part (1) of a mill, which ceramic inserts have been cast in a metal casting material (2).

A kind of ceramic cutter with magnetic absorption function, its structure includes storage bin, it includes at least one magnetic attraction plugboard and magnetic attraction column and storage shell, the storage shell inside has accommodating groove, the magnetic attraction plugboard and magnetic attraction column are located in accommodating groove, the outer wall of storage shell is embedded with adsorption groove;Handle, detachably set in adsorption groove, it includes mutually nested shell and inner shell, a plurality of positioning nails are provided on the shell and inner shell, the shell and inner shell are provided with hollow hole matched with positioning nail, the inner shell is provided with insertion slot;Blade body, slidingly arranged in insertion slot, is provided with magnetic attraction assembly at bottom;The cutter is realized the quick replacement of blade body and handle by magnetic attraction connection mode.Cylindrical storage bin is designed simultaneously, inner wall is provided with rotatable magnetic attraction insertion slot, for subpackaging different function blade body, outer wall is embedded with adsorption groove, for adsorbing handle, improve the storage efficiency, also by magnetic attraction connection mode, the stability and safety of cutter are enhanced.

A ceramic tool with integrated temperature sensing and cutting functions and preparation method and application thereof. The ceramic tool comprises a ceramic matrix, a positive thermoelectric layer and a negative thermoelectric layer being provided on two surfaces of the ceramic matrix; the ceramic matrix being formed by sintering a first matrix material, a first binding agent and a first reinforcing phase, and the thermoelectric layer being formed by sintering of a thermoelectric material; the first matrix material comprises one or more of Al2O3, Si3N4 and CBN; the first binding agent comprises one or more of Mo, Ni, Co, W and Cr; the first reinforcing phase comprises one or more of TiC, WC, SiC, MgO, Cr2O3, TiO2 and ZrO2; the thermoelectric material for the positive thermoelectric layer comprises ZrB2 and SiC; the thermoelectric material for the negative thermoelectric layer comprises ZrB2, SiC, and graphite.

This invention discloses a hydrophobic ZrO2 ceramic for ceramic knives and its preparation method, belonging to the field of ceramic materials technology. The preparation method of this invention includes the following steps: (1) raw material mixing; (2) two-step sintering; (3) annealing treatment; (4) laser surface treatment. This invention uses a pressureless two-step slow sintering process combining nano- and micro-scale ZrO2 powder gradation with multi-component additives to prepare a highly dense and strong ceramic matrix. On this basis, annealing treatment under an oxygen atmosphere is introduced to form an oxygen-saturated surface layer, and laser scanning with specific parameters is used to construct a micro-scale mesh-like protrusion structure with high mechanical strength. This structure gives the ceramic material surface durable hydrophobicity, with a water contact angle of 140-150°, effectively preventing food adhesion and easy cleaning, and the fracture toughness of the material is 6.94-7.56 MPa·m. 1 / 2 With a flexural strength of 683–746 MPa, it achieves long-term stability of surface hydrophobicity while maintaining excellent mechanical properties and durability.

1. The name of the design product: ceramic blade probe arm. 2. The use of the design product: the design product is used for loading and installing ceramic blade probes, and for double signal transmission with test equipment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a lightweight high-strength electric hammer drill and a preparation process thereof, and belongs to the technical field of electric hammer drills. The light-weight high-strength electric hammer drill comprises an electric hammer drilling machine and an electric hammer drill bit body, a cutting tool bit is installed at the front end of the electric hammer drill bit body, a carbon fiber composite rod is arranged in a hollow drill rod, and a penetrating rod is installed between the carbon fiber composite rod and the electric hammer drill bit body. The electric hammer drill bit solves the problems that in the actual using process of an existing drill bit body, the weight of the drill bit affects operation, and the working life of the drill bit cannot be guaranteed in long-term work, by introducing the ceramic tool bit, the wear-resisting life of the electric hammer drill bit body is increased by the order of magnitude, and when the ceramic tool bit drills reinforced concrete, the service life of the electric hammer drill bit body is prolonged. The electric hammer drill bit is high in abrasion resistance, the three-dimensional woven carbon fiber structure is adopted, the pulse impact load of an electric hammer can be effectively resisted, and the electric hammer drill bit body is not prone to layering and cracking under high-frequency impact and excellent in toughness performance.

The application discloses a reinforced wear-resistant Si3N4-BN-based composite ceramic cutter and a preparation method thereof, and the raw material composition according to the weight percentage is as follows: 20-22wt% of alpha-Si3N4, 11-13wt% of gamma-Si3N4, 16-17wt% of r-BN, 13-15wt% of c-BN, 10-12wt% of Ti(C,N), 8-10wt% of TiC, 2.0-2.5wt% of Co, 3.0-3.5wt% of Ti, 2.0-2.5wt% of Mo, 1.5-2.0wt% of a sintering agent, 3.0-4.0wt% of a dispersing agent, 0.8-1.0wt% of a lubricant, 0.5-1.5wt% of a reinforcing agent, 1.3-2.5wt% of a coating material and 2.0-2.5wt% of a negative ion powder. The application takes Si3N4 and BN as the main base materials of the ceramic cutter, optimizes the formula design and the preparation process, improves the compactness and sintering property of the cutter, significantly improves the quality and performance of the composite ceramic cutter, and can well meet the high-precision turning machining requirement.

The invention belongs to the field of ceramic cutting tool materials, and particularly relates to a complex-phase Ti (C, N)-based ceramic material with a double-solid-solution microstructure and a preparation method of the complex-phase Ti (C, N)-based ceramic material. The prepared ceramic material is prepared by taking Ti (C, N) as a matrix and adding ZrC, NbC and Mo2C as reinforcing phases through spark plasma sintering. The addition of ZrC induces the formation of a (Ti, Zr, Nb) (C, N) second solid solution phase rich in Zr elements; the dispersed distribution of the (Ti, Zr, Nb) (C, N) second solid solution phase in the crystal and at the crystal boundary can effectively pinning the crystal boundary, inhibit the abnormal growth of the crystal grains in the sintering process, realize the spanning from a single solid solution to the multiphase ceramic, obviously improve the bending strength, hardness and wear resistance of the Ti (C, N)-based ceramic material, and greatly improve the service life of the ceramic material. And irreplaceable importance is shown in the fields of cutter materials, precision machining and the like.

The invention belongs to the technical field of ceramic cutters, and discloses a ceramic cutter with nano-composite gradient thermal barrier layers and a preparation method thereof.The ceramic cutter comprises a matrix layer and gradient thermal barrier layers symmetrically attached to the two side faces of the matrix layer, in the matrix layer, Ti (C, N) serves as a matrix phase, Al2O3 and WC serve as reinforcing phases, and MgO serves as a sintering aid; in the gradient thermal barrier layer, Al2O3 is used as a matrix phase, (W, Ti) C and Ti (C, N) are used as reinforcing phases, nano ZrO2 is used as a toughening phase and a heat conductivity coefficient regulating phase, and Y2O3 and MgO are used as sintering aids; moreover, in the gradient thermal barrier layer, the contents of (W, Ti) C and nano ZrO2 are decreased progressively from the outside to the inside, the content of Ti (C, N) is increased progressively from the outside to the inside, and the heat conductivity coefficient is increased progressively from the outside to the inside. The middle matrix layer Ti (C, N) metal ceramic matrix material has a relatively high heat conductivity coefficient, so that the heat accumulation effect of the rake face of the tool can be relieved by dissipating heat.

The utility model relates to the field of sand adding devices, and discloses a ceramic knife blank stack firing sand adding device which comprises a workbench body, a sand adding assembly, a sand adding device and a sand adding device. The sand adding assembly comprises a hydraulic cylinder, a sand adding box, a conveying part, a sand guide pipe, a sand adding pipe, a drainage plate, a square plate, a cleaning plate and a placement seat, a hydraulic rod of the hydraulic cylinder is fixedly connected with the sand adding box, the conveying part is fixedly installed on the workbench body, the sand guide pipe is fixedly installed on the workbench body and the conveying part, the sand adding pipe is fixedly connected with the conveying part, and the sand adding pipe is fixedly connected with the drainage plate. The drainage plate and the placing base are fixedly installed in the sand adding box, the side face of the square plate is fixedly connected with the cleaning plate, a frame body is fixedly arranged at the top of the workbench body, the hydraulic cylinder is fixedly installed on the side face of the frame body, and the top of the conveying part is fixedly connected with the frame body. The sand collecting device has the following advantages and effects that redundant sand can be conveniently collected and used, and workers do not need to manually collect and clean the redundant sand.

The application belongs to the field of ceramic cutters, and discloses a high-entropy carbide-high-entropy carbonitride ceramic cutter and a preparation method and application thereof. The ceramic cutter comprises a cutter tip high-entropy carbide (Ti 0.2 Zr 0.2 Nb 0.2 Ta 0.2 W 0.2 )C and a relief high-entropy carbonitride (Ti 0.2 Zr 0.2 Nb 0.2 Ta 0.2 W 0.2 )C x N 1‑x (0.1≤x≤0.9). The carbide mixed powder of TiC, ZrC, NbC, TaC and WC and the carbonitride mixed powder of TiC, ZrC, NbC, TaC, WC, TiN, ZrN, NbN, TaN, WN and Ni powder are sintered by discharge plasma under vacuum environment at a pressure of 30-50 MPa and at a temperature of 1600-1800 DEG C. The cutter tip of the ceramic cutter has high hardness, the relief has high toughness and wear resistance, and the ceramic cutter can be applied to continuous cutting of high-hardness materials.