9 results about "Composite repairs" patented technology

The application discloses a seven-layer gradient function composite repairing construction method for concrete freeze-thaw damage, and the method comprises the following steps: investigating a freeze-thaw damage area, determining damage depth and range, removing all loose, peeled and cracked concrete by using mechanical tools until the base surface is exposed, carrying out rust removal and corrosion prevention treatment on the exposed steel bars, cleaning the interface by using high-pressure water jet, removing dust and debris, and coating, in sequence, a primer, anti-freezing repair mortar, nano-enhanced coating, cement-based anti-freezing, waterproof and corrosion-proof protective coating, alkali-resistant sealing primer and protective coating on the base surface, wherein the protective coating is coated in two layers, the damaged base body is reconstructed in a gradient mode, the structural integrity is restored, a long-acting protection system with the functions of active protection and passive barrier is constructed from inside to outside and with gradient transition of material properties, and the service life of the repaired structure in an extreme environment is significantly prolonged.

This invention discloses a method for preparing a coal-based solid waste-based microbial composite remediation material, belonging to the technical field of soil remediation material preparation and high-value utilization of industrial solid waste. The method includes four core steps: low-damage pretreatment of coal-based solid waste, low-concentration alkali-ultrasound synergistic mild pre-activation, in-situ directional acclimatization-biological secondary activation integrated treatment, microenvironment enhancement, and low-temperature binder-free molding. This invention breaks the technical bias of existing technologies that involve "high-strength modification first, then passive loading of microorganisms," transforming the conflict between solid waste activation modification and microbial compatibility acclimatization into a synergistic process, fundamentally resolving the core technical contradiction between solid waste activation efficiency and microbial survival requirements. The material prepared by this invention possesses both excellent pollutant adsorption and passivation capabilities and long-term microbial activity, and can be widely applied in the field of heavy metal contaminated soil remediation, while simultaneously achieving the harmless and high-value utilization of coal-based solid waste.

The application relates to a composite material repairing assembly and a composite material repairing method, wherein the composite material repairing assembly comprises: a pretreatment layer, which can be laid on a wind power blade and covers a to-be-repaired area; a pouring auxiliary material layer, which is arranged on one side of the pretreatment layer in a thickness direction of the composite material repairing assembly; a first vacuum layer, which is arranged on a side of the pouring auxiliary material layer away from the pretreatment layer, and covers the pouring auxiliary material layer; and a second vacuum layer, which is arranged on a side of the first vacuum layer away from the pretreatment layer, and has an area greater than that of the first vacuum layer. The composite material repairing assembly can improve repairing efficiency and convenience.

This invention belongs to the field of medical technology and discloses a rapid bone repair implant manufacturing method based on medical imaging and 3D printing. The method first involves CT scanning of the damaged bone area to obtain image files, then using Mimics software to reconstruct a 3D model. The model is imported into 3-Matics software for preprocessing, and a composite repair algorithm combining mirror symmetry and surface fitting is used to digitally repair the bone defect. The repair model is then converted to STL format and sliced, 3D printed using biocompatible materials, sterilized, and implanted into the patient. The innovations of this invention lie in the collaborative processing of Mimics and 3-Matics software, the composite repair algorithm combining mirror symmetry and surface fitting, and the end-to-end digital solution. This allows for personalized and precise customization of implants, reduces the risk of rejection, significantly improves repair accuracy and manufacturing efficiency, shortens the treatment cycle, reduces medical costs, and shows promising clinical application prospects.

This invention relates to a composite repair method for bevel drive gears, belonging to the field of gear repair technology. This invention combines the structure of the bevel drive gear with continuous drive friction welding technology, using additive manufacturing through continuous drive friction welding to repair the gear. This solves the problems of difficult procurement and high cost of using bevel drive gears in auxiliary power units, achieving cost reduction and efficiency improvement.

This invention discloses a method and apparatus for dry in-situ magnetically controlled repair of cavitation erosion on turbine blades. The method includes: after the turbine is shut down and the accumulated water is drained to create a dry environment, a repair actuator is inserted into the flow channel through a manhole in the volute and moved to the cavitation erosion area on the blade surface; geometric feature data of the cavitation erosion area is collected, and a thixotropic composite repair material containing magnetic particles is prepared; the composite repair material is injected into the cavitation erosion area according to the geometric feature data, and a controllable magnetic field is applied, using the magnetic force to drive the magnetic particles to migrate, thereby making the material dense and compacted and conforming to the blade profile; the compacted composite repair material is cured, and the repair actuator is withdrawn after reaching a preset strength. This invention enables unmanned in-situ repair of cavitation erosion areas on turbine blades, significantly shortening the maintenance cycle and reducing safety risks. The magnetic field compaction technology improves the density of the repair material and the bonding strength with the matrix, effectively ensuring the repair quality.

This invention relates to a high-performance polymer-cement-based composite repair material and its preparation method. The high-performance polymer-cement-based composite repair material, by mass fraction, comprises the following components: 690-710 parts cement; 130-150 parts fly ash; 45-55 parts silica fume; 200-210 parts mixing water; 950-1050 parts fine aggregate; 21-23 parts modified polymer; 9-10 parts expansion agent; 4-5 parts water-reducing agent; 5-6 parts modified fiber; and 0.16-0.18 parts defoamer. This invention utilizes nano-toughened modified polymer and modified fiber. The nano-modified polymer improves the microstructure of the repair material, while the modified fiber limits shrinkage and enhances the crack resistance of the matrix. The synergistic effect of both effectively improves the toughness and mechanical properties of the repair material, ensuring that early cracking does not occur.

This invention relates to the field of light-emitting diode (LED) technology, and discloses an AlGaInP LED epitaxial wafer and its fabrication method. The fabrication method of the AlGaInP LED epitaxial wafer includes the following steps: S1, providing a substrate; S2, sequentially depositing a buffer layer, an N-type confinement layer, an N-type waveguide layer, an active layer, a P-type waveguide layer, a P-type confinement layer, and a P-type window layer on the substrate; S3, depositing an ohmic contact layer on the P-type window layer; S4, dry etching the ohmic contact layer to retain the nanomaterial at the target location, forming multiple nanopillars, with grooves formed between the nanopillars; S5, fabricating a composite repair layer on the inner surface of the grooves; the composite repair layer includes a sequentially stacked in-situ passivation layer, an AlGaAs transition layer, and an AlAs layer. Implementing this invention can improve crystal quality, repair etching defects, enhance radiative recombination to improve internal quantum efficiency, and improve device reliability.

This invention relates to the field of polyvinyl chloride (PVC) insulation material preparation technology, specifically to a PVC insulation material for ultra-scratch-resistant cables and its preparation process. By weight, it comprises 100 parts PVC resin, 10-15 parts chlorinated polyethylene, 5-7 parts calcium-zinc composite stabilizer, 30-45 parts plasticizer, 0.5-1.5 parts lubricant, 0.5-0.7 parts antioxidant, 10-15 parts flame retardant, 0.5-0.8 parts colorant, 3-8 parts wear-resistant fiber, and 5-15 parts composite repair filler. The composite repair filler is a composite structure obtained by coating a repair agent onto a nano-container. The wear-resistant fiber added to the PVC matrix forms a skeleton structure. During friction, the fiber skeleton initially bears wear, and the nano-container releases the repair agent when needed, filling and repairing micro-cracks, achieving high initial wear resistance and subsequent repairability, thus extending the service life of the cable under high-frequency, high-intensity scratching conditions.