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47 results about "Spark plasma sintering" patented technology
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Spark plasma sintering (SPS), also known as field assisted sintering technique (FAST) or pulsed electric current sintering (PECS), is a sintering technique. The main characteristic of SPS is that the pulsed or unpulsed DC or AC current directly passes through the graphite die, as well as the powder compact, in case of conductive samples. Joule heating has been found to play a dominant role in the densification of powder compacts, which results in achieving near theoretical density at lower sintering temperature compared to conventional sintering techniques. The heat generation is internal, in contrast to the conventional hot pressing, where the heat is provided by external heating elements. This facilitates a very high heating or cooling rate (up to 1000 K/min), hence the sintering process generally is very fast (within a few minutes). The general speed of the process ensures it has the potential of densifying powders with nanosize or nanostructure while avoiding coarsening which accompanies standard densification routes. This has made SPS a good method for preparation of ceramics based on nanoparticles with enhanced magnetic, magnetoelectric, piezoelectric, thermoelectric, optical or biomedical properties. SPS is also used for sintering of Carbon Nanotubes for development of field electron emission electrodes. While the term "spark plasma sintering" is commonly used, the term is misleading since neither a spark nor a plasma is present in the process. It has been experimentally verified that densification is facilitated by the use of a current.
A method for preparing high-density high-uniformity IGO target material
This application relates to the field of oxide target technology, specifically disclosing a high-density, high-uniformity IGO target and its preparation method. The preparation method of the high-density, high-uniformity IGO target includes the following steps: [The text abruptly shifts to a different topic]...containing In... 3+ Ga 3+ A mixed solution of metal ions and ammonia solution is mixed to obtain a precursor precipitate, which is then allowed to stand for a preset aging time. The aged precursor precipitate is then subjected to supercritical drying and calcination to obtain IGO powder. The IGO powder is mixed with a sintering aid and then subjected to ball milling, air classification, molding, cold isostatic pressing, spark plasma sintering, and heat treatment to obtain the IGO target material. The IGO target material obtained in this application has uniform composition, high density, and stable microstructure. The transparent conductive film prepared using this target material has high visible light transmittance and excellent conductivity, solving the problems of uneven composition, low density, and poor quality of sputtered films in existing target materials.
Owner:XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
A method for preparing high-hardness Ti-Zn alloy containing fcc-Ti phase
This invention discloses a method for preparing a high-hardness Ti-Zn alloy containing the fcc-Ti phase. This method utilizes the synergistic effect of high-energy ball milling mechanical alloying and spark plasma sintering to obtain a high-hardness Ti-Zn alloy containing the fcc-Ti phase. First, high-energy ball milling mechanical alloying increases the solid solubility of Zn in Ti. Then, spark plasma sintering yields a dense pure solid solution of Ti, forming an alloy with three coexisting phases: fcc-Ti, bcc-Ti, and hcp-Ti. This significantly improves the alloy's hardness and wear resistance. The synergistic effect of high-energy ball milling mechanical alloying and spark plasma sintering is specifically designed to obtain a Ti-Zn alloy containing the fcc phase, thereby enhancing its hardness and wear resistance.
Owner:GUANGDONG OCEAN UNIVERSITY
High-chromium-content chromium-aluminum target material and method for manufacturing the same
This application relates to the technical field of powder metallurgy, specifically to a high-chromium-content chromium-aluminum target and its preparation method. The atomic percentage content of each element is: Cr 60-80 at%, with Al as the balance. The preparation method includes: uniformly mixing chromium powder and aluminum powder using zirconia balls to obtain a chromium-aluminum mixed powder; loading the obtained chromium-aluminum mixed powder into a rubber sleeve, sealing it after vacuuming, and performing cold isostatic pressing to obtain a chromium-aluminum billet; loading the obtained chromium-aluminum billet into a graphite mold, vacuuming, and heating for pre-sintering; continuing to heat while applying axial pressure for spark plasma sintering; cooling the sintered billet to room temperature in the furnace, demolding, and machining to obtain the high-chromium-content chromium-aluminum target. The preparation method provided by this application can effectively suppress component segregation, significantly improve the density and compositional uniformity of the target material, and has a short production cycle and low cost, making it suitable for the large-scale production of high-chromium-content chromium-aluminum targets.
Owner:TARFILM HI-TECH CO LTD
Method for improving high-temperature oxidation resistance of Ti-Cr-Mo-Si alloy material
This invention relates to a method for improving the high-temperature oxidation resistance of Ti-Cr-Mo-Si alloy materials, and relates to the field of high-strength, tough, and heat-resistant structural metal materials. The alloy material is composed of a Ti matrix and Cr, Mo, and Si alloying elements, which are distributed in the titanium alloy matrix in the form of solute atoms. The mass percentage of the alloying elements is: Cr: 2-8%, Mo: 2-8%, Si: 0.5-1.5%, with the remainder being Ti. The preparation method is as follows: Ti powder, Cr powder, Mo powder, and Si powder are ball-milled and mixed, followed by spark plasma sintering and high-temperature oxygen-environment heat treatment to obtain a high-strength and high-toughness Ti-Cr-Mo-Si alloy material with high temperature resistance and oxidation resistance. This invention achieves the construction of a dense bimodal TiO2-SiO2 oxide film, a Ti-Cr-Mo-Si alloy matrix, and a nano-deformed TiN twin layer through the synergistic effect of high-energy ball milling, spark plasma sintering, and high-temperature oxidation treatment. The resulting back stress strengthening, grain refinement strengthening, solid solution strengthening, and twin strengthening effects synergistically enable the prepared alloy material to exhibit excellent high-temperature oxidation resistance and excellent mechanical properties, effectively solving the problem that high-temperature materials cannot synergistically improve high-temperature oxidation resistance and mechanical properties during service.
Owner:KUNMING UNIV OF SCI & TECH
High-temperature high-strength high-entropy max phase bulk material and preparation and application thereof
The application discloses a high-temperature high-strength high-entropy MAX phase bulk material and a preparation method thereof. The high-temperature high-strength high-entropy MAX phase bulk material is expressed as M2AX, M is a combination of any four or more of Ti, Zr, V, Nb and Ta, the atomic percentage of each component in the M sublattice is between 5% and 35%, the sum of the atomic percentages of Zr and V is less than or equal to 16.7%, A is an Al element, and X is a C element. The bulk MAX phase material is prepared by a spark plasma sintering method. The high-temperature high-strength high-entropy MAX material prepared by the application has high purity and excellent mechanical properties at room temperature and high temperature, can be used for preparing high-temperature structural parts under special working conditions, and has a wide application prospect in the high-temperature field.
Owner:UNIV OF SCI & TECH BEIJING
Alkaline-earth metal stable oxygen-like superatomic cluster material and preparation method thereof
PendingCN122081724AFacilitate in-situ assemblyinhibit growthTransportation and packagingMetal-working apparatusAl powderAlkaline earth metal
The invention discloses an alkaline earth metal stable oxygen-like superatomic cluster material and a preparation method thereof.The material is prepared from aluminum powder, alkaline earth metal hydride and anhydrous metal halide serving as a structure-directing agent, and the preparation method comprises the steps that firstly, under the inert atmosphere, the raw materials are subjected to high-energy ball milling to prepare a composite precursor; then temperature programming heat treatment is carried out, hydrogen generated by hydride in-situ decomposition is used for reducing an interface and inducing lattice defects, and meanwhile, interface migration and chemical adsorption effects of halide ions are used for pinning newly generated cluster units; and finally, carrying out non-equilibrium densification through spark plasma sintering. According to the method, the defect that a thermodynamically stable alloy phase is easily formed in a traditional smelting method is overcome, the oxygen-like cluster structure with the 38 electron open shell layer characteristic is successfully stabilized in a macroscopic solid state through a synergistic mechanism of gas phase pore forming and interface pinning, and the material is endowed with excellent catalytic activity and semimetal conduction characteristic.
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
High-entropy carbonitride ceramic with high toughness and oxidation resistance and method of making same
The application discloses a high-entropy carbonitride ceramic with high toughness and oxidation resistance and a preparation method thereof. The high-entropy carbonitride ceramic is composed of a high-entropy carbonitride matrix phase, a high-entropy boride second phase and a hexagonal boron nitride third phase which are uniformly distributed. The high-entropy carbonitride ceramic is obtained by ball milling high-entropy carbonitride powder and high-entropy boride powder to obtain high-entropy mixed powder and then performing spark plasma sintering on the high-entropy mixed powder. The high-entropy carbonitride ceramic provided by the application has good uniformity, high density, excellent high toughness and oxidation resistance.
Owner:HUNAN UNIV
A homogeneous Mg3(Sb,Bi)2 alloy prepared by a formation energy-controlled melting method and its preparation method
The application discloses a homogeneous Mg3(Sb, Bi)2 alloy prepared by a forming energy regulated melting method and a preparation method thereof, and belongs to the technical field of thermoelectric materials. The application aims at solving the problems that Sb and Bi atom stress imbalance causes phase separation and composition segregation in the existing melting preparation of the Mg3(Sb, Bi)2 alloy, leads to the precipitation of Bi element, the low carrier concentration, the limited improvement of the thermoelectric figure of merit and the reduction of the structural stability of the alloy. The chemical general formula is Mg 3.38‑x Zn x (Sb, Bi)2Nd 0.02 ; the method comprises the following steps: one, raw materials; two, sealing the raw materials; three, melting; four, spark plasma sintering. The application is used for the homogeneous Mg3(Sb, Bi)2 alloy prepared by the forming energy regulated melting method and the preparation thereof.
Owner:HARBIN INST OF TECH
A method for preparing Cu-TiB2-Zr by a composite dispersion treatment suspension ball milling method
A method for preparing Cu-TiB2-Zr by ball milling of a composite dispersion treatment suspension includes the following steps: (1) powder pretreatment; (2) calcination reduction; and (3) spark plasma sintering. The addition of a second-phase Zr in this invention inhibits the agglomeration and growth of nano-sized TiB2 during sintering, further enhancing performance through a co-strengthening mechanism between the two. This invention uses a suspension instead of powder for mechanical alloying, introduces deionized water as a process control agent to reduce surface activity, and uses ammonium polyacrylate as a dispersant to weaken the powder's ability to agglomerate, accelerating the ball milling process and ensuring the second phase is uniformly and diffusely distributed in the matrix. Spark plasma sintering technology refines the grain size of the alloy through the combined effects of plasma activation and sintering densification, ultimately yielding a Cu-TiB2-Zr composite material with high density, uniform grain structure, superior mechanical and electrical properties, and a wider range of applications.
Owner:HEFEI UNIV OF TECH
Methods for preparing sulfide-based solid electrolytes
This invention provides a method for preparing a sulfide-based solid electrolyte. First, an amorphous sulfide powder is prepared from a lithium sulfide, a phosphorus-containing material, and optionally a halogen source. Then, the powder is densified by spark plasma sintering at 360°C to 600°C and 1 MPa to 140 MPa for 1 to 15 minutes to obtain a crystalline silver-germanium sulfide structure. A crystalline sulfide-based solid electrolyte and an all-solid-state secondary battery prepared by the described method are also provided.
Owner:HYUNDAI MOTOR CO LTD +2
High-strength cemented carbide material and method for producing the same
This invention relates to the field of cemented carbide materials technology, specifically disclosing a high-strength cemented carbide material and its preparation method, comprising the following raw materials in parts by weight: 5-8 parts cobalt powder, 86-90 parts tungsten carbide powder, 2.4-2.8 parts reinforcing components, and 0.5-0.7 parts modifiers. The preparation method of the high-strength cemented carbide material includes the following steps: step S1, preparation of premix; step S2, spray granulation; step S3, compaction; and step S4, spark plasma sintering. This invention incorporates reinforcing components and modifiers. The reinforcing components contain aluminum dihydrogen phosphate, silica sol, cerium oxide, zirconium oxide, tantalum carbide, molybdenum carbide, and titanium dioxide gel, which not only possess excellent physical properties themselves but also form hydrogen bonds with the modifiers, synergistically improving the overall performance of the cemented carbide material.
Owner:PENG TUNGSTEN ALLOY (SHANDONG) CO LTD
A preparation method of gradient cemented carbide based on differential ball milling and taking pre-alloyed cobalt-nickel as a binder phase
A method for preparing gradient cemented carbide based on differentiated ball milling and using pre-alloyed cobalt-nickel as the binder phase includes the following steps: (1) preparation of pre-alloyed cobalt-nickel binder powder; (2) preparation of surface mixed powder; (3) preparation of core mixed powder; (4) spark plasma sintering. This invention pre-alloys Co powder and Ni powder, which is beneficial for improving the compositional uniformity and distribution uniformity of the CoNi binder phase, and for ensuring stable distribution of the binder phase during sintering; differentiated ball milling of the surface layer and core layer establishes the interlayer structure basis of the gradient cemented carbide from the powder source; the gradient structure gives the surface layer higher hardness and wear resistance, and the core layer better toughness and crack resistance, achieving a unified matching of high surface hardness and high core toughness; densification is achieved by pre-pressing combined with spark plasma sintering, resulting in a gradient cemented carbide with clear layered structure characteristics and excellent comprehensive service performance.
Owner:HEFEI UNIV OF TECH
A wmo tanb-cu composite material and a method for manufacturing the same
The application discloses a WMoTaNb-Cu composite material, the WMoTaNb-Cu composite material is composed of a WMoTaNb refractory high-entropy phase and a Cu phase, and the mass percentage of the Cu is 15% to 65%; and the application further discloses a preparation method of the WMoTaNb-Cu composite material, which comprises the following steps: step one, under the condition of an inert atmosphere, high-energy ball milling is performed on mixed powders of WMoTaNb alloy powder and Cu powder; and step two, under the condition that the vacuum degree is not greater than 10 Pa, the mixed powders subjected to the high-energy ball milling in the step one are subjected to spark plasma sintering to obtain the WMoTaNb-Cu composite material.The WMoTaNb-Cu composite material disclosed by the application is composed of the WMoTaNb refractory high-entropy phase and the Cu phase, has excellent electrical conductivity and mechanical properties, and is suitable for preparing an electric contact in the field of electric power equipment.
Owner:NORTHWEST INSTITUTE FOR NONFERROUS METAL RESEARCH
Mechanics-shielding integrated magnesium-based composite material and preparation method thereof
PendingCN122147123ACarbon compoundsMagnetic/electric field screeningPorous grapheneMagnesium matrix composite
The application discloses a kind of mechanical-shielding integrated magnesium-based composite material and preparation method thereof, it is related to metal-based composite material preparation technical field.The preparation method of mechanical-shielding integrated magnesium-based composite material of the present application is as follows: porous graphene is prepared by etching graphene with acid solution;Mix the porous graphene with magnesium powder, ball mill to obtain the powder after ball milling;The powder after ball milling is subjected to spark plasma sintering to obtain sintered block;The sintered block is subjected to hot extrusion, and the mechanical-shielding integrated magnesium-based composite material is obtained after cooling;The present application utilizes the synergistic effect of porous graphene and magnesium matrix to induce the generation of high-density nano-MgO at the interface, enhance the interfacial bonding strength and improve the mechanical properties of the composite material.The porous structure and spark plasma sintering synergistically reduce electromagnetic wave reflection, and the electromagnetic wave absorption is enhanced through multiple interface loss and polarization loss.The obtained composite material realizes efficient electromagnetic shielding dominated by absorption in the X-band, effectively inhibits secondary pollution.
Owner:KUNMING UNIV OF SCI & TECH
A high-entropy carbide single-phase solid solution coating with resistance to 3000℃ high temperature and near-zero ablation, its preparation method and application
This invention discloses a high-entropy carbide single-phase solid solution coating with near-zero ablation resistance at 3000℃, its preparation method, and its application. It primarily addresses the problem of insufficient solid solution between transition metal carbides and unsatisfactory material properties in existing coatings. The process includes: using a high-entropy carbide (TMC) mixed powder as raw material; ball milling the raw material to obtain a slurry; spray granulation to obtain TMC agglomerated powder; sintering and solidifying the powder using a graphite mold via spark plasma sintering; and finally, vacuum plasma spraying to deposit the coating onto the substrate surface, resulting in a sheet-like high-entropy carbide single-phase solid solution coating with porous and cracked structures. After oxyacetylene ablation, low-melting-point oxides are generated, forming a dense glassy ablation layer on the coating surface, achieving near-zero ablation. This invention can obtain an ideal single-phase solid solution coating with near-zero ablation characteristics at high temperatures while effectively reducing process complexity and economic costs.
Owner:XIDIAN UNIV
A high toughness ods ferritic martensitic steel and a method of making the same
This invention relates to a high-strength and high-toughness ODS ferritic martensitic steel and its preparation method, belonging to the technical field of ferritic martensitic steel. The alloy, by mass percentage, comprises: Cr 9%–11%, W 1%–2%, Mn 0.45%–0.55%, Si 0.25%–0.35%, C 0.1%–0.15%, Ta 0.1%–0.2%, Zr 0.05%–0.1%, and Y₂O. 3 The content is 0.2%–0.3%, with the balance being Fe. The preparation method includes: mechanical alloying of pre-alloyed powder (containing the above elements, but excluding Y2O3) and nano-Y2O3 powder, followed by spark plasma sintering, high-temperature large-deformation hot rolling for densification, and multiple heat treatments to obtain a ferritic-martensite dual-phase structure. Then, large-deformation cold rolling and annealing are performed to obtain a fine-grained structure. Through the synergistic effect of nano-Y2O3 dispersion strengthening, work hardening, and fine-grain strengthening, the mechanical strength is significantly improved.
Owner:SICHUAN UNIV
Preparation method of SiC / AlFeCrCoNi high-entropy alloy composite material and product thereof
The application provides a preparation method of SiC / AlFeCrCoNi high-entropy alloy composite material and a product thereof, and belongs to the technical field of alloys.The preparation method comprises the following steps: 1) mixing SiC plated with copper with AlFeCrCoNi high-entropy alloy powder, ball milling the mixture to obtain a ball-milled material; and 2) performing spark plasma sintering on the ball-milled material to obtain the high-entropy alloy composite material.The SiC / AlFeCrCoNi high-entropy alloy composite material prepared by the method has high tensile strength and good elongation.
Owner:SHANXI JIANGHUAI HEAVY IND
A hafnium europium oxide neutron absorbing ceramic material, a preparation method and applications thereof
This application discloses a hafnium-europium oxide neutron-absorbing ceramic material, its preparation method, and its application. The method involves mixing water-soluble hafnium salt, water-soluble europium salt, ammonium nitrate, fuel, surfactant, and deionized water to form a mixture system. The mixture system is then heated and evaporated. The resulting gel system absorbs heat and reaches its ignition point, undergoing a combustion synthesis reaction to obtain ultrafine-crystalline hafnium-europium oxide nanoparticles. These nanoparticles are then placed in a sintering mold and subjected to spark plasma sintering under vacuum and 30-50 MPa conditions to obtain the hafnium-europium oxide neutron-absorbing ceramic material. In this application, the preparation process of the ultrafine-crystalline hafnium-europium oxide nanoparticles is simple and efficient, resulting in nanoparticles with a small average particle size, which shortens the powder preparation cycle. Combined with spark plasma sintering, this effectively improves the density of the sintered body, shortens the sintering time, and inhibits excessive grain growth in the ceramic.
Owner:GRINM RESOURCES & ENVIRONMENT TECH CO LTD +1
Manufacturing method of re-fe-b based sintered magnet and re-fe-b based sintered magnet manufactured through the method
The present invention discloses a method for manufacturing an RE-Fe—B-based sintered magnet and the RE-Fe—B-based sintered magnet manufactured using the method. The invention comprises: a step of preparing a mixed powder by mixing magnet powder containing RE-Fe—B-based grains with a heavy rare earth diffusion source, a step of pressing the mixed powder to produce a compact, a step of performing spark plasma sintering (SPS) on the compact to form a sintered body, and a step of heating the sintered body to diffuse the heavy rare earth diffusion source into the grain boundaries of the sintered body, wherein the grain size of the RE-Fe—B-based grains is controlled during the step of forming the sintered body.
Owner:DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY
A method of infiltrating diamond nanoparticles into a cemented carbide and the composite material produced thereby
The present application relates to a kind of diamond nanoparticles infiltrates the method for reinforcing hard alloy and the composite material made, belongs to hard alloy strengthening field.The method is first mixed, dry screen powder by ball milling under argon protection to WC, Co, VC powder, then preliminary WC-Co hard alloy sample is prepared by spark plasma sintering process.The key step is to uniformly coat nano diamond dispersion liquid after the surface of sintered sample is polished, and cover protection plate, be placed in the crucible covered with diamond powder, in argon atmosphere, stage heating to 1250 DEG C and heat preservation 3h are carried out heat treatment, so that diamond nanoparticles infiltrate matrix, finally by ultrasonic cleaning to remove residue.The method significantly improves the hardness of hard alloy, the sample after processing significantly increases the vickers hardness compared with untreated sample without reducing core fracture toughness, effectively enhances the wear resistance of material, process is simple and controllable, suitable for high stress working condition tool material.
Owner:HEFEI UNIV OF TECH
A method for preparing high-strength and high-purity graphite materials
This invention relates to the field of graphite materials technology, and more specifically to a method for preparing high-strength, high-purity graphite materials. The method includes: dispersing diamond micron powder, carbon black, phenolic resin, and a surfactant in anhydrous ethanol in a predetermined proportion to form a slurry; drying and granulating the slurry; pre-pressing and dehydrating / curing the slurry; and finally sintering the slurry in a spark plasma sintering furnace to obtain high-strength, high-purity graphite materials. The graphite material prepared by this invention has a bulk density ≥ 2.0 g / cm³. 3 Vickers microhardness ≥1.78GPa, compressive strength ≥380MPa.
Owner:ZHONGYUAN ENGINEERING COLLEGE
Preparation method of ZrO2 reinforced TiZrNbTaCu high-entropy alloy
The application relates to a preparation method of a ZrO2 reinforced TiZrNbTaCu high-entropy alloy, specifically to introducing an antibacterial element copper into a TiZrNbTa base body, and preparing the ZrO2 reinforced TiZrNbTaCu high-entropy alloy through high-energy ball milling and spark plasma sintering. The atomic ratio of titanium powder, zirconium powder, niobium powder and tantalum powder is 1-5:1:1:1, the mass ratio of copper powder and TiZrNbTa powder is 3-7:97-93, and the mass ratio of stearic acid and titanium-zirconium-niobium-tantalum-copper powder is 0.05-1.5:100. The ZrO2 reinforced TiZrNbTaCu high-entropy alloy prepared by the application has the integrated characteristics of low modulus, high strength, high wear resistance, strong antibacterial property and good biocompatibility, and is a very potential hard tissue repair substitute material.
Owner:GUANGDONG OCEAN UNIVERSITY
A rare earth permanent magnet material with high temperature stability and a preparation method thereof
ActiveCN113903538BMagnetic materialsInductances/transformers/magnets manufactureMaterials scienceHeat treated
The application discloses a rare earth permanent magnet material with high temperature stability and a preparation method thereof. x Co 100‑x‑y‑z Hf y M z , wherein M is one or more of Zr, Fe and Cu elements, x, y and z represent mass percentages, 24 < x < 27, 0 < y <= 2 and 0 < z < 30. Sm x Co 100‑x‑y‑z Hf y M z The magnetic powder is prepared into a bulk rare earth permanent magnet material with small grain size and excellent coercivity temperature stability through a spark plasma sintering technology and heat treatment. The rare earth permanent magnet material with small grain size and high temperature stability is obtained by optimizing the alloy composition and microstructure. In addition, the application also has the characteristics of short sintering time and simple process flow, and effectively improves the coercivity temperature stability of the material.
Owner:JIANGXI UNIV OF SCI & TECH
A precision aluminum nitride ceramic for semiconductor devices and its preparation process
This invention discloses an aluminum nitride precision ceramic for semiconductor devices and its preparation process, comprising the following steps: mixing and ball-milling aluminum nitride powder, sintering aid, modified binder, dispersant, and plasticizer to obtain a slurry; degassing the slurry to obtain a degassed slurry; casting the degassed slurry into a green body; debinding the green body at 550-600℃ for 3-5 hours to obtain a debinded green body; sintering the debinded green body in a spark plasma sintering furnace in a three-stage process; and cooling the sintered body to room temperature to obtain the aluminum nitride precision ceramic for semiconductor devices. The aluminum nitride precision ceramic for semiconductor devices and its preparation process of this invention result in ceramics with good thermal conductivity and strength.
Owner:FUJIAN HUAQING ELECTRONICS MATERIAL TECH
A spark plasma sintering apparatus coupling pressure oscillation and electric field
The present application relates to the technical field of sintering, and particularly relates to a discharge plasma sintering equipment coupled with pressure oscillation and electric field. The equipment comprises a furnace body system, a pressure oscillation loading system, a multi-state current-thermal field response system, a multi-field collaborative control system and an auxiliary system. The present application realizes rapid heating and active defect regulation through the "copper bar-press head-mold" passage by the cooperation of pressure oscillation and multi-state current, and realizes defect-oriented sintering under high temperature and large load conditions through the precise matching of each system.
Owner:HOHAI UNIV
A two-site reverse gradient doped and in-situ modified garnet solid-state electrolyte, and a preparation method and application thereof
The application provides a garnet-type solid-state electrolyte modified by two sites and a reverse gradient, a preparation method and application thereof, and adopts a three-in-one synergistic strategy of a two-site reverse gradient doping, a grain boundary in-situ fast ion conductor modification and a surface isomorphic passivation layer construction, so that inherent contradictions between uniform doping and structural stability and body phase conductivity can be fundamentally solved. In addition, the preparation process of the application combines a conventional sol-gel method with a spark plasma sintering, has strong controllability, has a short sintering period and is suitable for large-scale production, and provides a feasible technical scheme for industrial application of the LLZO solid-state electrolyte.
Owner:GUIZHOU MATERIAL IND TECH INSTITUE
A copper alloy with TiC and TiB2 hybrid reinforcing phase and preparation method and application
PendingCN122105182AManufacturing dynamo-electric machinesSupports/enclosures/casingsMetallurgyCopper alloy
The application belongs to the technical field of copper alloy, and particularly relates to a copper alloy with TiC and TiB2 hybrid reinforcing phase, a preparation method and application. The preparation method of the copper alloy with TiC and TiB2 hybrid reinforcing phase provided in the application is to mix Ti, SiC and CuB and then sinter into a hybrid reinforcing phase body, so as to introduce the reinforcing phase such as TiC and TiB2 into the copper alloy by means of the reaction wetting method, avoid the defects such as poor wettability, weak interface bonding and uneven dispersion between the added reinforcing phase and the copper matrix, reduce the reaction between the Ti powder and the Si powder in the copper alloy raw material, increase the generation amount of the hybrid reinforcing phase such as TiC and TiB2, and improve the copper alloy. By using the spark plasma sintering and controlling the amount of Ti, SiC and CuB in the copper alloy raw material, the performance of the copper alloy is further improved, so as to solve the technical problem of low performance of the copper alloy prepared in the prior art.
Owner:ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
Carbon ceramic closing resistor for high-voltage circuit breaker and preparation method thereof
PendingCN122079598Ano structural defectsuniform performanceResistor manufactureNon-adjustable resistorsMulliteKaolin clay
The invention discloses a carbon ceramic closing resistor for a high-voltage circuit breaker and a preparation method of the carbon ceramic closing resistor, and belongs to the technical field of power elements. The problems of poor resistor compactness, non-uniform performance, insufficient mechanical property and the like caused by high pressing and sintering difficulty, process instability and high and non-uniform resistor porosity of the carbon ceramic resistor are solved. The preparation process of the resistor comprises the following steps: by taking aluminum oxide and quartz as ceramic phases, presintered kaolin, mullite and potassium feldspar as clay phases and carbon black or graphite as conductive phases, pre-coating the ceramic phases with the clay phases, carrying out vacuum calcination on pre-coated powder, mixing the pre-coated powder with the secondarily added clay phases and the conductive phases, carrying out spray granulation, pressing a green body, sintering and spraying. And obtaining the carbon ceramic closing resistor. According to the invention, the kaolin is pre-sintered, and the clay phase is pre-coated with the ceramic phase, so that the subsequent blank pressing uniformity and density are increased, the structural defects of the carbon ceramic resistor are reduced, and in combination with the spark plasma sintering technology, the batch rapid production of the resistor can be realized.
Owner:JILIN CHANGYU SPECIAL CERAMICS NEW MATERIAL TECH CO LTD