9 results about "Bonded interface" patented technology

This invention discloses a method for metal hot-press bonding and its application. The method specifically includes: providing a first substrate and a second substrate, the first substrate having a first metal bonding surface and the second substrate having a second metal bonding surface; aligning the first and second substrates to bring the first and second metal bonding surfaces into contact; and performing hot-press bonding by controlling temperature and applying pressure. The hot-press bonding includes a heating and high-pressure stage, a heat-holding and low-pressure stage, and a cooling and pressure-releasing stage; the temperature of the heat-holding and low-pressure stage is the bonding temperature. This invention achieves hot-press bonding of metals in an air environment through coordinated temperature and pressure control, resulting in a well-bonded interface that is free of oxidation, dense, and pore-free.

The application belongs to the field of material mechanical property experiment, and discloses a universal clamp for a testing machine for mixed adhesive interface testing, which comprises two clamp assemblies with the same structure, each clamp assembly comprising a clamp, upper and lower pins and symmetrically arranged gaskets; the clamp is connected with the testing machine through threads and locked by a nut; the main body of the clamp is provided with a pin through hole, the pin passes through the pin through hole on one side of the clamp, the pin hole on the gasket, the pin hole on the test piece, the pin hole on the gasket arranged on the other side, and the pin through hole on the other side of the clamp, and then the test piece is limited and installed; and the gasket and the test piece are locked by a bolt, and the positioning of the test piece is realized. The application can be installed on a universal tensile testing machine and an electric fatigue testing machine, and the designed upper and lower clamps, pins and gaskets can realize the mechanical testing of the mixed lap joint interface.

This invention discloses a high-strength carbon fiber modified plastic and its preparation method. By weight, it comprises the following raw materials: 90-100 parts polypropylene, 8-12 parts modified carbon fiber, 3-5 parts maleic anhydride-grafted polypropylene, 2-4 parts toughening agent, 0.7-1.1 parts antioxidant, and 0.5-0.8 parts lubricant. This high-strength carbon fiber modified plastic achieves its goal by subjecting the carbon fiber surface to specific multi-step modification, sequentially introducing an aminosilane coupling layer, a gallic acid amide bond linking layer, and an itaconic acid active double bond functional layer. This forms an inside-out covalently bonded interface system, transforming the simple physical contact between the carbon fiber and the polypropylene matrix into a chemical bond. Furthermore, by combining maleic anhydride-grafted polypropylene as an interface compatibilizer and ethylene-octene copolymer as a toughening agent, the formulation design ensures both high strength and material toughness, resulting in a high-strength carbon fiber modified polypropylene composite material with balanced mechanical properties.

This invention discloses a wear-resistant self-lubricating resin for composite surface layer structures and its preparation method, belonging to the field of composite surface layer technology. It includes a matrix resin component A, a lubricating component B, a curing agent component C, and a coupling agent component D. Reactive functional groups are introduced onto the surface of solid lubricating particles through coupling agent component D. This invention uses a silane coupling agent to perform surface grafting modification on PTFE and MoS₂, introducing reactive functional groups onto the particle surface. These functional groups participate in the curing and crosslinking network of the epoxy resin, forming a "chemically bonded interface." This structure allows the lubricating particles to wear uniformly in the form of a "molecular brush" during friction, while deep lubricating particles are continuously exposed and replenished to the friction interface, achieving a long-term mechanism of lubrication reserve and continuous release. The low surface energy of PTFE fills the gaps in the transfer film, forming a "continuous, dense, low surface energy" composite lubricating film on the mating surface. This synergistic effect significantly reduces the coefficient of friction.

This invention relates to the field of polymer materials technology, specifically to a weather-resistant rubber material for sealing strips and its preparation method: It is made from the following raw materials in parts by weight: 60-80 parts rubber matrix, 5-10 parts silica, 20-40 parts composite weather-resistant filler, 1-3 parts dioxane, 0.5-1.5 parts triallyl isocyanurate, 5-10 parts paraffin oil, 1-2 parts phenolic antioxidant, and 0.5-1.5 parts lubricant. In this invention, the modified filler uses cerium-doped zirconium phosphate as the core component. The variable valence of cerium ions continuously captures and passivates the active free radicals generated during the thermo-oxidative aging of rubber. Simultaneously, the layered structure of zirconium phosphate forms a physical barrier against oxygen and ozone. The modified filler inhibits the oxidation chain reaction at its source, while the chemically bonded interface prevents filler detachment during aging, thus preventing protective failure and maintaining material stability in long-term thermo-oxidative and ozone environments.

This invention relates to a weather-resistant and anti-aging protective layer for offshore wind power facilities and its preparation method, belonging to the field of anti-corrosion coating technology. The preparation method includes: preparing a latent reactive conductive primer slurry; applying the latent reactive conductive primer slurry to a substrate surface and allowing it to semi-cure, followed by electrophoretic penetration treatment to obtain an electrophoretic latent reactive conductive primer layer; subjecting the electrophoretic latent reactive conductive primer layer to thermal curing treatment to obtain a cured primer layer; and applying a topcoat to the cured primer layer and curing it to obtain a weather-resistant and anti-aging protective layer. This invention improves the interfacial bonding strength and wet adhesion of the coating system by constructing a chemically bonded interface instead of a traditional physical interface; and effectively fills coating defects through electrophoretic penetration, improving the long-term protective performance of the coating under damaged conditions.

This invention discloses an MPCVD growth method for peelable polycrystalline diamond with a weakly bonded interface structure, belonging to the field of diamond material preparation technology. By constructing a slow-release interface layer, low-temperature high-methane concentration nucleation, and high-temperature low-methane gradient growth, a diamond film thickness of 100-1000 µm can be achieved. By controlling the cooling stress through a mechanical model and supplementing it with laser cutting or thermal pulse induction, the diamond film can be automatically peeled from the silicon substrate with a peel surface roughness ≤1 nm, requiring no polishing. This process eliminates the need for chemical etching of the silicon wafer, is simple, environmentally friendly, and produces a self-supporting thick diamond film with high thermal conductivity and high surface quality, suitable for applications such as chip heat dissipation, optical windows, and quantum devices.

This disclosure provides a method for controlling the interfacial microstructure and properties of TiAl / Ti2AlNb alloy diffusion-bonded joints, comprising: subjecting the TiAl / Ti2AlNb alloy diffusion-bonded joints to electro-pulse treatment and thermomechanical treatment respectively; wherein the electro-pulse parameters are: pulse voltage of 30~50V, pulse frequency of 120~180Hz, and pulse time of 10~30s; the thermomechanical treatment parameters are: deformation temperature of 1050℃~1150℃, holding time of 20~40min, and deformation controlled below 15%, wherein the deformation direction during the thermomechanical treatment is parallel to the alloy diffusion-bonded interface. This invention employs an integrated technology of post-weld electro-pulse and thermomechanical coupling treatment, which can eliminate the defect of equal brittleness at the interface of the TiAl / Ti2AlNb alloy joint, while simultaneously allowing for more complete microstructure evolution, a more uniform and finer diffusion layer microstructure, and ultimately resulting in better strength and toughness at the TiAl / Ti2AlNb alloy joint, yielding a bi-alloy material with excellent comprehensive mechanical properties.

This invention relates to the field of microwave absorbing materials, specifically disclosing a high-entropy alloy FeCoNiCuW microwave absorbing material and its preparation method. This invention uses different porous materials as conductive substrates, and through the synergistic reduction and in-situ assembly of multiple metal ions (Fe, Co, Ni, Cu, W) during electrodeposition, forms a tightly bonded interface between the alloy layer with a high-entropy structure and the substrate. The resulting composite material combines the magnetic loss of the high-entropy alloy with the conductive network advantages of the substrate, effectively improving impedance matching and interface polarization capabilities, thereby achieving wide-bandwidth, high-efficiency, and stable electromagnetic wave absorption performance. This invention achieves in-situ bonding of the high-entropy alloy and the substrate through a low-temperature electrodeposition method. The preparation process can be completed at ambient pressure and low temperature, is simple to operate, and has good repeatability. This invention not only simplifies the preparation process and improves the bonding strength, but also provides a new technical path for the design and engineering application of high-performance electromagnetic protection materials.