15 results about "Transition layer" patented technology

This invention relates to the field of materials science, specifically to a method for preparing a high-bonding, ultrahard nanolayered thin film, the film itself, and its applications. The film comprises a Cr / Ti metal bonding layer, a CrTiN intermediate layer, a TiNC transition layer, and an a-C:Ti nanocomposite surface layer sequentially deposited on a substrate surface. The a-C:Ti ultrahard nanolayered thin film prepared by this invention achieves multi-layer stacking at the microscale by controlling the periodic modulation structure of the bonding layer, intermediate layer, and transition layer, effectively suppressing dislocation and crack propagation. Through Ti doping modification and gradient periodic modulation structure design, the internal stress of the film is reduced, improving its bonding strength, wear resistance, and toughness, reducing the risk of coating cracking or peeling, and enhancing the film's service stability. The a-C:Ti ultrahard nanolayered thin film of this invention is particularly suitable for applications such as precision machining tool coatings, surface strengthening of aero-engine gears and bearings, and wear protection of microelectromechanical systems (MEMS).

The invention discloses a composite material with a near-zero temperature coefficient. The composite material comprises composite particles with three layers of core shells, the composite particle comprises a metal organic framework serving as an inner core, a conductive carbon transition layer serving as a middle layer and a gradient doped tin oxide layer serving as a shell, and the resistance temperature coefficient symbols of materials of the inner core and the shell are opposite within the range of 0-80 DEG C. According to the composite material with the near-zero temperature coefficient, a three-layer core-shell structure of a metal organic framework core / a conductive carbon transition layer / a gradient doped SnO2 shell is adopted, mutual offset of temperature coefficients can be achieved in the material, and therefore drifting of baseline resistance generated along with fluctuation of the environment temperature is reduced.

The utility model relates to the technical field of diffusion films, and discloses a scratch-resistant wear-resistant quantum dot diffusion film which comprises a protective layer, a transition layer is fixedly connected to the lower end of the protective layer, a diffusion composite layer is fixedly connected to the lower end of the transition layer, and a substrate layer is fixedly connected to the lower end of the diffusion composite layer. According to the utility model, the diamond-like carbon coating on the surface of the protective layer is used for providing protection for the surface of the membrane material and is matched with the substrate layer and the transition layer which are made of enhanced PET (Polyethylene Terephthalate) materials to provide certain absorption for the internal stress or external impact of the structure, so that the aim of providing stable protection for the subsequent use of the membrane material is fulfilled; the subsequent membrane material is prevented from being damaged due to external scraping or impact, so that the service life of the membrane material is prolonged, the subsequent maintenance cost is further reduced, and the overall practicability of the membrane material is improved.

This invention discloses a high-load-bearing backing bearing with a multi-layered composite wall thickness outer ring. The bearing's dynamic blocking transition layer is composed of polyhedral rigid microparticles and a viscoplastic matrix, with the microparticle volume fraction limited within a critical blocking threshold range. Under quasi-static radial heavy loads, the microparticles are in a blocked state, forming a rigid force chain that transmits hydrostatic stress. Under high-frequency transverse shear stress wave excitation, the matrix undergoes transient superplastic rheology, and the force chain enters a locally unblocked state, resulting in micro-rheology and a sudden drop in transverse shear stiffness. Based on the orthogonal decoupling of stress states and the dual-state phase transition characteristics, this invention actively disrupts the subsurface standing wave resonance condition, resolving the contradiction between macroscopic compressive strength and microscopic dissipation. This effectively suppresses deep peeling failure under high-speed, heavy-load conditions, and its material selection and process design fully embody the energy-saving and high-efficiency concept of green manufacturing.

The invention discloses a film coating method for the surface of a bearing disc. The film coating method comprises the steps that a transition layer is formed on the surface of the bearing disc; and forming a metal layer on the surface of the transition layer. According to the technical scheme, the metal protective film with the antibacterial effect is formed on the surface of the bearing disc, and the bearing disc does not need to be cleaned frequently, so that the problems of time, cost, environmental influence, labor conditions and the like caused by cleaning of the bearing disc can be solved.

The invention discloses a drill bit double-layer surfacing method based on interlayer temperature control, and belongs to the technical field of surfacing processes. The double-layer surfacing technology is adopted, layer-by-layer surfacing of a base material, a transition layer and a working layer is achieved by controlling the interlayer temperature of double-layer surfacing, and the problems that in actual use of a drill bit, cracks and peeling are prone to occurring, bending fatigue resistance and interface bonding strength are seriously insufficient, and reliability is poor are solved.

The invention relates to a composite contact and a preparation method thereof. The composite contact comprises a contact layer, a transition layer and a core layer, wherein the contact layer is connected with the core layer through the transition layer; the material of the contact layer comprises a first copper-chromium material, the material of the transition layer comprises a second copper-chromium material, the material of the core layer comprises a third copper-chromium material, the copper content in the first copper-chromium material is 55-65% by mass, the copper content in the second copper-chromium material is 45-53% by mass, and the copper content in the third copper-chromium material is 38-43% by mass. Compared with a traditional homogeneous material, the composite contact can maintain excellent durability while having high conductivity, and the problem of local failure of the contact under high current load can be effectively reduced.

The application discloses a multilayer structure high bearing self-lubricating erosion-resistant coating and a preparation method and application thereof, and belongs to the technical field of composite coatings. The multilayer structure high bearing self-lubricating erosion-resistant coating comprises a metal ceramic support layer, a transition layer and a DLC layer arranged on the surface of a substrate in sequence; the transition layer comprises an Nb main transition layer away from the DLC layer and an NbC transition layer close to the DLC layer; the transition layer has a columnar crystal morphology as a whole; and the total thickness of the transition layer is 0.1 microns to 2 microns. The multilayer structure high bearing self-lubricating erosion-resistant coating gradually relieves the thermal / pressure stress between layers through specific multilayer structure design, effectively improves the bonding strength, bearing capacity, corrosion resistance and protective durability of the coating, realizes the synergistic improvement of the self-lubricating erosion-resistant performance of the coating, and can improve the service life of parts and the safety of equipment under marine working conditions.

The application belongs to the technical field of semiconductor manufacturing, and provides an avalanche photodiode and a preparation method thereof, wherein a transition layer structure is constructed by using an InGaAlAs quaternary material layer, the growth rate of the quaternary material layer in contact with an absorption layer is V2, the growth rate of the remaining quaternary material layer is V3, the growth rate of the absorption layer and other layers is V1, the avalanche photodiode is obtained by molecular beam epitaxy growth with V1=0.4 μm / h~0.8 μm / h, V2 / V1=1~1.1, and V3 / V1=1.5~2.5; V1 is small, which is helpful to improve the electrical performance, reduce the background concentration, reduce the surface defects, and provide a prerequisite for the smooth growth of the transition layer structure; V2 is close to V1, which can ensure the interface performance of the transition layer structure and the absorption layer; thus, by controlling V3 to be greatly improved, it is beneficial to improve the efficiency and realize the balance between high quality and high-speed production.

The utility model relates to a transfer layer steel bar positioning system, and belongs to the technical field of steel bar engineering, the transfer layer steel bar positioning system comprises a fixed sleeve, the outer surface of the fixed sleeve is slidably connected with two sliding blocks, the left sides of the sliding blocks are fixedly provided with a steel pipe, and the outer surface of the steel pipe is slidably connected with a plurality of positioning assemblies; the positioning assemblies are used for positioning steel bars, adjusting assemblies are fixed to the left side of the steel pipe, and positioning rods are arranged in the two adjusting assemblies. According to the transfer layer reinforcing steel bar positioning system, by arranging the positioning assembly, when reinforcing steel bars are positioned, the reinforcing steel bars can be effectively prevented from deviating, then the overall stability is effectively guaranteed, the positioning assembly can move, the position of the positioning assembly can be conveniently adjusted according to site requirements, the overall structure is simple, and the practicability is high. And the position accuracy of the steel bars is effectively guaranteed, so that subsequent machining is facilitated, and the machining period is shortened.

The present disclosure relates to the field of coating, in particular to a kind of anticorrosive coating and preparation method thereof, the anticorrosive coating includes: connecting layer, transition layer and Mo-Cr-C functional layer, the connecting layer is used to connect with base material;The transition layer is coated on the side of the connecting layer away from the base material;The Mo-Cr-C functional layer is coated on the side of the transition layer away from the connecting layer, to connect the Mo-Cr-C functional layer and the connecting layer by the transition layer;Wherein, the thickness of the Mo-Cr-C functional layer is 1.3 μm-3.8 μm, the atomic percentage ratio in the Mo-Cr-C functional layer is 28%≤Mo≤36%, 22%≤Cr≤40%, 32%≤C≤42%.Can improve the corrosion resistance, wear resistance and wear resistance of marine equipment.

The invention discloses a method for improving the strength of a metal material. The method comprises the following steps that S1, a metal base material is subjected to refined pretreatment; s2, low-temperature plasma bombardment modification; s3, gradient doping pretreatment; s4, performing ultrasonic-assisted interface fusion; s5, dynamic aging strengthening; s6, gradient cooling stress regulation and control; and S7, post-treatment is conducted. According to the method, low-temperature plasma bombardment modification is different from pure surface polishing activation in the prior art, grains on the surface of the base material are refined through the bombardment effect of plasma, meanwhile, a tiny concave-convex structure is formed on the surface, the binding force of a subsequent gradient doped transition layer is improved, and the surface strength of the base material is enhanced; besides, through the synergistic process of gradient doping, ultrasonic-assisted interface fusion, dynamic aging and gradient cooling, comprehensive improvement of the material strength is achieved, parameters of all the steps can be flexibly adjusted according to the type of the base material and environmental conditions, and the environmental adaptability is high.

The utility model discloses a composite gradient lining structure for a highway tunnel in a cold region, which relates to the technical field of tunnel construction and comprises a tunnel primary support serving as an outermost support structure, a tunnel inverted arch arranged at the bottom of the tunnel and connected with the tunnel primary support, and a tunnel filling layer arranged above the tunnel inverted arch. Through optimal combination of different materials, a gradient transition layer is formed, material stress concentration caused by freeze-thaw cycle is effectively relieved, lining cracking and peeling risks are remarkably reduced, and the service life of a tunnel in a low-temperature environment is prolonged; according to the design of the tunnel composite gradient lining structure in the scheme, the thickness can be adjusted according to the grade of surrounding rock when a new project is applied, but due to the excellent performance of materials used by the composite gradient lining, the total thickness of the lining structure is smaller than that of a common structure, the excavation volume of the surrounding rock can be reduced, the construction risk is integrally reduced, and the engineering economy is improved.

The invention discloses a high-bearing-capacity backing bearing with a multi-layer composite wall thickness outer ring, and relates to a bearing, a dynamic blocking transition layer of the high-bearing-capacity backing bearing is composed of polyhedral rigid microparticles and a viscoplastic matrix, and the volume fraction of the microparticles is limited in a critical blocking threshold value interval. When the micro-particles bear quasi-static radial heavy load, the micro-particles are in a blocked state to form a rigid force chain to transmit hydrostatic pressure stress; when high-frequency transverse shear stress wave excitation is borne, transient superplastic rheology happens to a base body, a force chain enters a local unblocking state to generate micro rheology, and sudden reduction of transverse shear rigidity is triggered. Based on the stress state orthogonal decoupling double-state phase change characteristic, the subsurface standing wave resonance condition is actively destroyed, the contradiction between macroscopic compression resistance and microcosmic dissipation is solved, deep stripping failure under the high-speed heavy-load working condition is effectively restrained, and the energy-saving and efficient concept of green manufacturing is fully embodied through material selection and process design.

The utility model belongs to the field of railway electromagnetic relays, and particularly relates to a composite contact applied to a railway electromagnetic relay and an assembly thereof. The utility model provides a composite contact applied to a railway electromagnetic relay. The composite contact comprises a substrate layer, a transition layer and a wear-resistant layer. The substrate layer is made of Ag-Cu-Ni alloy; the outer surface of the substrate layer is coated with the transition layer, and the transition layer is made of AgSnO2; the outer surface of the transition layer is coated with the wear-resistant layer, and the wear-resistant layer is made of Ag-Graphene. According to the composite contact applied to the railway electromagnetic relay and the assembly thereof provided by the utility model, the arc erosion resistance of the contact can be improved, the steady-state contact resistance can be reduced, and cadmium-free environment-friendly materials are used.