9 results about "Zirconium diboride" patented technology

The application relates to a preparation method of a low-density zirconium diboride-silicon carbide foam ceramic material and belongs to the technical field of foam ceramic preparation. The application aims at solving the problems of forming difficulty and sintering shrinkage of the zirconium diboride-silicon carbide foam ceramic. The preparation method is simple. The silicon carbide template prepared by impregnating a ceramic impregnation solution under vacuum conditions is dried and sintered in subsequent steps, and finally, the low-density zirconium diboride-silicon carbide foam ceramic is obtained. The low-density zirconium diboride-silicon carbide foam ceramic material prepared by the application has the characteristics of uniform structure, nanometer-level grains and excellent mechanical properties, and has a good application prospect in the high-temperature heat insulation field.

The application relates to the technical field of ultrahigh-temperature ceramic materials, and discloses a nano ZrB2-SiC composite ceramic powder based on gradient proportioning regulation and a low-temperature preparation method thereof; in view of the technical bottlenecks such as high reaction temperature (>=1600 DEG C), large powder particle size (>=10 mu m) and difficult two-phase proportion regulation in the prior art, the application innovatively proposes a gradient temperature-subsection proportioning preparation process. By accurately controlling the raw material proportioning of n(ZrO2):n(B4C):n(Si):n(C)=3:(1.8-2.0):1:(5.5-6.0), adopting a two-stage heating procedure (SiC crystal nuclei are preferentially generated at 1200 DEG C, and ZrB2 synthesis is completed at 1500 DEG C), the low-temperature and high-efficiency synthesis of ZrB2-SiC composite powder is realized in a single process. The complete reaction temperature is successfully reduced to 1500 DEG C, the average particle size of the obtained powder is 0.5-0.6 mu m, the oxygen content is <=0.8 wt%, and the ZrB2:SiC molar ratio can be accurately regulated in the range of 2:1 to 4:1 by adjusting the Si content. The ZrB2 (101) plane and the SiC (111) plane in the powder form a semi-coherent interface, and the crystal lattice distortion rate is <=3%.

The application discloses a kind of high thermal shock resistance magnesium carbon brick, which is made of the following raw materials by weight percentage: fused magnesite aggregate 60-75%, fused magnesite fine powder 10-20%, flake graphite 8-12%, thermosetting phenolic resin binder 3-4%, vitamin C 0.3-0.8%, and zirconium diboride 2.2-4.9%. The preparation process of the magnesium carbon brick disclosed in the application includes: dissolving VC in part of the phenolic resin to form an acid-based pretreatment solution; using the strategy of dry mixing aggregate with ZrB2 to make ZrB2 preferentially adhere to the surrounding of aggregate particles; then using a two-step wet mixing and material packing process of adding the VC pretreatment solution first and then adding the remaining resin, the functions of vitamin C and zirconium diboride are coordinated in resisting thermal shock, which fundamentally inhibits the structural spalling of the magnesium carbon brick in the ladle.

The present application relates to the technical field of battery shell production, and particularly relates to a production method of a battery aluminum shell.The present application discloses a production method of a battery aluminum shell, which comprises the following steps: after 6-series aluminum alloy is subjected to melting, degassing, continuous casting and rolling forming, the aluminum alloy is subjected to two-stage ball milling together with zirconium diboride and modified lignin to prepare a composite plate; after pretreatment through alkali washing and acid etching, the plate is coated with a lignin-zinc compound coating and solidified; after preheating, the plate is pulled through a gradient temperature mold to perform hot draw forming, and an interface reaction occurs simultaneously; after laser repair welding of defects, the plate is subjected to preheating, cooling and stabilization heat treatment; finally, the plate is subjected to precise machining such as milling and polishing to obtain a finished product.The present application can make the aluminum shell have stable microstructure and optimized interface bonding, excellent mechanical properties and corrosion resistance by means of phase composite, gradient coating and heat treatment regulation, and the process is controllable, so the present application is suitable for large-scale production of battery aluminum shells.

The application discloses a low-residual-stress superhard titanium alloy zirconium diboride film and a preparation method thereof, and steps are as follows: step 1: a zirconium diboride target, a titanium target and a zirconium target are respectively installed on three radio frequency power sources; step 2: a substrate is subjected to impurity removal treatment and is placed on a base; step 3: a reaction chamber is vacuumized; inert gas is introduced until the pressure of the reaction chamber is 0.1 Pa; and pre-sputtering treatment is carried out; step 4: the base bias is set to 20 V, and the rotating speed is 5 rpm; the radio frequency power source provided with the zirconium target is first started, the power is set to 50 W, and a transition layer is plated on the surface of the substrate; then the other two radio frequency power sources are simultaneously started to carry out sputtering, and a preliminary composite film is obtained; and step 5: the preliminary composite film is annealed in a vacuum environment at 800 DEG C to obtain a final composite film. The hardness of the application reaches 42 GPa, the residual stress is only 0.359 GPa, and the oxidation resistance and high-temperature friction and wear resistance are simultaneously improved.

This invention discloses an electro-erosion resistant metal-based composite contact material with a gradient textured interface and its preparation process, relating to the technical field of metal-based electrical contact materials for low-voltage electrical appliances. The process includes the following steps: S1. Preparation of surface functional phase precursor: Preparing a preform containing nano-scale zirconium diboride-titanium diboride multiphase precursor clusters as an intermediate raw material for introducing the multiphase reinforcing phase; S2. Gradient preform forming: Preparing a core high-conductivity layer preform, an intermediate gradient transition layer preform, and a surface electro-erosion resistant functional layer preform respectively; wherein, the surface preform is obtained by cold pressing after mixing the surface functional phase precursor with matrix metal powder in a certain proportion. Through the core processes of asynchronous rolling pre-control and segmented gradient annealing, the material texture orientation is directionally controlled, resulting in a core high-conductivity layer. This texture exhibits the lowest lattice scattering probability and the smallest effective electron mass along the electron transport direction.

This invention discloses a titanium alloy composite material based on fused ring conjugated molecules and its preparation method. In the composite material, the surface of the titanium alloy is coated with a fused ring conjugated molecular film. The titanium alloy has a multilayer deposition structure, and a mixture of zirconium diboride (ZrB2) powder or V powder is coated between the layers. In this invention, the titanium alloy material is formed by multilayer deposition, and a mixture of ZrB2 powder or V powder is added between the layers. Cyclic heat treatment modification is adopted, which significantly improves the hardness value of the titanium alloy composite material. At the same time, coating the titanium alloy component with a fused ring conjugated molecular film improves the photothermal properties of the titanium alloy composite material and solves the problems existing in the existing titanium alloy materials. After the above-mentioned multi-step heat treatment process, the hardness of the titanium alloy component is increased by 64.96% compared with that before treatment. After uniformly coating the surface of the component with a fused ring conjugated molecular film, the temperature increases to 41.4 °C after 50 min of irradiation without heat treatment, and to 50.8 °C after 50 min of irradiation with heat treatment.

The application provides an anti-erosion ceramic-magnesium-based composite refractory brick and a preparation method thereof, and belongs to the technical field of ceramic composite magnesium refractory bricks. Raw material components of the refractory brick include ceramic composite material, fused magnesia, boron-nitrogen-doped carbon-silane modified magnesium-aluminum spinel intermediate, fused magnesium-chromium powder, zirconium diboride, silicon powder, silicon-iron-nitride boron composite additive and the like. The boron-nitrogen-doped carbon-silane modified magnesium-aluminum spinel intermediate is prepared by coating fused magnesium-aluminum spinel powder with PEG and boron-nitrogen-doped carbon black, then modifying with a silane coupling agent, and sintering. The ceramic composite material includes tabular corundum particles, micron alumina and ZrO2@SiC whiskers. The silicon-iron-nitride boron composite additive is prepared by ball milling silicon-iron alloy powder, boron nitride powder and PEG2000. The multi-phase synergistic design breaks through the performance short board of traditional single-system refractory bricks, and realizes overall balance and balanced improvement of hardness, wear resistance, corrosion resistance, thermal shock resistance and hydration resistance.

The application discloses a surface coating of an induction coil of a medium-frequency welding machine and a preparation method thereof. The surface coating comprises a transition layer and a surface layer. The transition layer is composed of nickel-aluminum, aluminum oxide and coated powder in a weight ratio of 85-90:5-8:5-10. The surface layer is composed of aluminum oxide and potassium silicate in a weight ratio of 94-98:2-6. The coated powder is formed by coating zirconium diboride with calcium fluoride. The thickness of the transition layer is 30-150 microns. The thickness of the surface layer is 200-500 microns. The prepared coating has good bonding strength and insulation performance, and the preparation method is simple and efficient, and is suitable for various industrial applications.