358 results about "Temperature resistance" patented technology

The invention provides a corrosion-resistant and high-temperature-resistant composite quartz crucible and a preparation method thereof. The quartz crucible sequentially comprises the following laminated layers in parts by weight from inside to outside: 50-100 parts of an inner layer, 200-400 parts of a transition layer, 150-250 parts of a reinforcing layer and 40-80 parts of an outer layer, the preparation method comprises the following steps: forming layer by layer: sequentially adding inner-layer slurry, transition-layer powder, a reinforcement-layer prefabricated member and outer-layer slurry into a mold for forming; gradient drying is conducted, specifically, the formed crucible blank is put into a drying box to be subjected to gradient drying; and step-by-step sintering: putting the dried crucible blank into a high-temperature sintering furnace, carrying out step-by-step sintering, and cooling and demolding to obtain a crucible product. A composite protection system is designed and constructed through four layers of functionally graded materials, the prepared composite quartz crucible has excellent high temperature resistance, corrosion resistance and structural stability and can be applied to large-size semiconductor single crystal furnaces, and the engineering advantage of the preparation process is remarkable.

The invention relates to the field of tension and pressure sensors, in particular to a tension and pressure sensor with a compensation function, which comprises an elastic body, a strain gauge, a compensation gauge and a wiring terminal, the strain gauge and the compensation gauge are respectively arranged on the surface of the elastic body, the strain gauge, the compensation gauge and the wiring terminal are electrically connected through a plurality of high-temperature-resistant cables to form a bridge circuit, at least the strain gauge and the compensation gauge are respectively limited in the first heat insulation layer and the protection layer, and the first heat insulation layer is located between the elastic body and the protection layer. At least a first heat insulation layer used for protection, heat insulation, pressure resistance and sealing is used for wrapping a strain gauge and a compensating gauge which are packaged by a polyimide film and can resist the high temperature of 260 DEG C, so that the actual temperature of the strain gauge and the compensating gauge has a remarkable temperature difference with the current environment temperature; the actual temperature of the strain gauge and the compensating gauge is obviously lower than the environment temperature, so that the strain gauge and the compensating gauge are respectively in an ideal temperature range, and the force measurement precision of the pull pressure sensor is ensured.

The invention relates to the technical field of coatings, in particular to a coating suitable for niobium-silicon alloy surface high-temperature protection and a preparation method of the coating. The coating comprises the following raw materials in parts by weight: 100-120 parts of deionized water, 60-80 parts of nickel-chromium-aluminum-yttrium alloy powder, 60-80 parts of enamel glaze, 50-60 parts of filler, 20-40 parts of a binder, 10-20 parts of nano titanium dioxide and 6-10 parts of an additive. According to the invention, during preparation of the coating, through addition of the filler, the negative thermal expansion performance of zirconium tungstate in the filler and volume shrinkage of zirconium tungstate in a high-temperature state, a buffer space is provided for thermal expansion of other materials in the coating, cracks of the coating due to thermal stress are avoided, and the high-temperature resistance of the coating is improved; kH560 enhances the interfacial compatibility of zirconium tungstate, avoids agglomeration of zirconium tungstate, and enables the zirconium tungstate to be more uniformly distributed in a coating system.

The invention discloses a temperature self-compensation Wheatstone bridge structure, and relates to the field of Wheatstone bridges, at least one group of sub-strain gauges which are separated from adjacent arms, are mutually compatible and are attached to the same area of the same elastic beam exist in a four-arm resistor of the Wheatstone bridge structure; the temperature resistance change trends of the compatible sub strain gauges tend to be the same; wherein each group of compatible two sub-strain gauges are closely attached to each other so that the two sub-strain gauges are located in the same area of the same elastic beam, so that the two closely attached sub-strain gauges generate homodromous temperature resistance variation, resistance temperature drift caused by local temperature difference of different arms is counteracted, and temperature self-compensation is realized. According to the invention, temperature compensation can be carried out on the local temperature difference of the force sensor, so that the measurement accuracy of the six-dimensional force sensor is improved.

The invention provides double-silver coated glass capable of being tempered in different places and a preparation method of the double-silver coated glass, and relates to the technical field of coated glass. The invention provides double-silver coated glass capable of being tempered in different places, which comprises a glass substrate, the bottom dielectric combination layer, the first Ag functional layer, the first metal sacrificial layer, the middle dielectric combination layer, the second metal sacrificial layer, the second Ag functional layer, the third metal sacrificial layer and the top dielectric protection combination layer are sequentially deposited on the surface of one side of the glass substrate from inside to outside. Each of the bottom dielectric combination layer and the middle dielectric combination layer is formed by laminating more than two dielectric layers; the top layer dielectric protection combination layer is formed by laminating more than two dielectric layers and a top layer protection layer, and the top layer protection layer is located at the outermost layer. The double-silver coated glass provided by the invention has excellent high-temperature resistance and supports remote tempering and laminated processing treatment, and the tempered product has excellent performance; and an excellent heat insulation effect is achieved.

The invention discloses a multi-layer heat insulation composite material based on a high-temperature-resistant modified alloy foil and a preparation method thereof, and belongs to the technical field of thermal protection materials.The preparation method comprises the following steps that (1) the alloy foil is subjected to high-temperature pre-oxidation treatment for a period of time in the air atmosphere, and the high-temperature-resistant modified alloy foil with good infrared radiation shielding performance is obtained; (2) alternately laminating the spacer material and the high-temperature-resistant modified alloy foil to obtain a multi-layer heat insulation composite material based on the high-temperature-resistant modified alloy foil; in the multi-layer heat insulation composite material based on the high-temperature-resistant modified alloy foil, the upper surface and the lower surface are both made of spacer materials, and a layer of high-temperature-resistant modified alloy foil reflecting screen is arranged between every two layers of spacer materials. The problem that a traditional reflecting screen system is insufficient in temperature resistance is solved, and the use environment of the multi-layer heat insulation composite material based on the metal reflecting screen is effectively widened.

The invention discloses a high-temperature-resistant titanium alloy and a preparation method thereof. The high-temperature-resistant titanium alloy comprises, by mass, 5.5%-6% of aluminum, 3.5%-4.2% of tin, 3.8%-4.5% of zirconium, 0.2%-0.4% of molybdenum, 0.8%-1.2% of tungsten, 0.2%-0.4% of niobium, 0.25%-0.4% of silicon, 0.4%-0.55% of manganese, 0.2%-0.5% of silicon carbide, 0.03%-0.06% of carbon and the balance titanium and inevitable impurities. The titanium alloy disclosed by the invention is excellent in room-temperature and high-temperature strength, relatively high in thermal stability, creep resistance and oxidation resistance and relatively high in high-temperature resistance, the room-temperature tensile strength is greater than 1100MPa, the high-temperature tensile strength at the temperature of 650 DEG C is greater than 650MPa, and the high-temperature tensile strength at the temperature of 750 DEG C is greater than 450MPa.

The invention discloses a release film for semiconductor packaging based on PET and ETFE compounding and a preparation method of the release film, and belongs to the technical field of film materials, the release film structurally comprises a PET base material layer, an adhesive layer and an ETFE layer which are sequentially arranged, and the adhesive layer is prepared from the following raw materials in parts by mass: 40-60 parts of fluorine-containing acrylate compound; 20 to 30 parts of epoxy modified organic silicon resin; 5 to 10 parts of nano silicon dioxide; 1 to 2 parts of a photoinitiator; wherein the surface of the contact side of the PET base material layer and the adhesive layer is subjected to plasma treatment or corona treatment, and the dyne value is larger than or equal to 50 mN / m; the surface of the side, making contact with the adhesive layer, of the ETFE layer is subjected to fluoridation treatment, and the surface roughness Ra is smaller than or equal to 1 micrometer. The release film has the advantages of controllable release force in a range of 0.1-5N / 25mm, good stability, temperature resistance of 175 DEG C, good organic solvent resistance, and wide application prospect in the field of semiconductor packaging.

The present application relates to a kind of high-temperature-resistant inductive angle sensor, belong to angle sensor technical field.The sensor includes: gradient composite ceramic substrate Al2O3-ZrO2-Al2O3, realize thermal expansion coefficient gradient matching by intermediate layer zirconium oxide doped yttrium oxide, reduce thermal stress cracking risk;Substrate surface is formed with micro-arc oxidation porous layer in turn titanium nitride nanocrystalline layer, improve surface bonding force;Atomic layer deposition process is used to prepare TiN or TiN / Ag composite film coil, improve temperature resistance;Through electron beam welding and transient liquid phase bonding composite process coil and circuit;Insulating encapsulation layer is made of boron nitride nanosheet and high-temperature-resistant resin, improve thermal conductivity and breakdown field strength.The present application is through gradient substrate design, thin film coil integration and composite process optimization, solves the thermal stress failure of traditional inductive sensor under high temperature, coil oxidation and insulation aging problem, suitable for angle measurement under extreme environment.

The invention discloses a high and low temperature resistant organosilicon gel and a preparation method thereof, the organosilicon gel comprises a component A and a component B, the component A is prepared by mixing 100 parts of vinyl-terminated silicone oil and 0.05-0.2 part of a platinum catalyst, and the component B is prepared by mixing 50-70 parts of vinyl-terminated silicone oil, 20-40 parts of a chain extender, 5-15 parts of a cross-linking agent, 0.05-0.2 part of an inhibitor and 0.05-0.3 part of a heat-resistant additive. The organic silicon gel disclosed by the invention is low in viscosity, good in fluidity, colorless and transparent, good in flexibility and low stress after being cured, good in adhesion effect on various base materials, excellent in electric insulativity and high and low temperature resistance, capable of tolerating a high temperature of 240 DEG C for a long time, and free of chain segment crystallization behavior at a low temperature of-77 DEG C. The organic silicon gel is used for packaging protection of various different substrates and electronic components, the reliability and the service life of the components, high-power semiconductor modules and the like at high temperature can be remarkably improved, and the reliability of electronic equipment is guaranteed.

The invention relates to a high-temperature-resistant Si3N4-based wave-absorbing material based on FSS and a preparation method thereof. The high-temperature-resistant Si3N4-based wave-absorbing material based on the FSS comprises a frequency selective surface layer, a porous silicon nitride dielectric layer and a metal substrate which are sequentially stacked from top to bottom, the frequency selective surface layer is composed of M * N FSS units which are periodically arranged in a two-dimensional plane and are in a Jerusalem cross pattern, M is larger than or equal to 8, and N is larger than or equal to 8. The high-temperature-resistant Si3N4-based wave-absorbing material based on the FSS provided by the invention can realize effective absorption of C-Ku wave band electromagnetic waves, has the characteristics of thin thickness, low reflectivity, high strength, high temperature resistance, light weight and wide frequency band, and can realize the purpose that the high-temperature-resistant Si3N4-based wave-absorbing material can be used for absorbing high-temperature-resistant Si3N4-based wave-absorbing material in a complex and severe physical environment with relatively small physical burden. And efficient, reliable and lasting absorption of broadband electromagnetic waves is realized.

This invention relates to a heat-resistant, multifunctional bacterial strain and its application, belonging to the field of microbial technology and aquatic ecological restoration. This invention solves the technical problems of low high-temperature activity and limited functionality of existing bacterial strains. The heat-resistant, multifunctional bacterial strain of this invention is *Bacillus zanthoxyli* MH-168, with accession number CGMCC No. 37674. The application of this strain in the treatment of eutrophication in water bodies is also discussed. The MH-168 strain was obtained by screening from sediment in urban landscape water bodies. This strain exhibits vigorous growth at 40-50℃ and weak growth at 55℃, while also possessing siderophore production, protein degradation, organophosphate degradation, and salt tolerance. It can stably perform nutrient degradation and iron chelation functions at high temperatures, solving the technical problems of low high-temperature activity and limited functionality of existing bacterial agents.

The application provides a base glass, a preparation method of the base glass, a glass powder, a granulation powder, a glass insulator and a temperature sensor glass sealing workpiece. 3 The base glass comprises BaO 50-80 parts, B2O3 5-30 parts, SrO 1-10 parts, SiO2 1-25 parts, Al2O3 1-15 parts, CaF2 0.1-10 parts, TiO2 0.1-5 parts, rare earth oxide 0.7-3.1 parts and Nb2O5 0.1-3 parts; the rare earth oxide comprises La2O3 and Y2O3. The glass raw material of the application is lead-free, has high strength and air tightness, the lead-free microcrystalline glass system meets the insulation requirement of high-temperature sensors under long-time high-temperature environment, is resistant to repeated temperature impact and will not crack, the electric property does not attenuate, the problem of high-temperature resistance of metal sealing parts is solved, and the performance requirements of high-temperature resistance and high insulation are met.

The application discloses Cu-Si3N4-FeCoCrNiMn nanolayer composite material and a preparation method thereof, characterized by comprising a plurality of groups of sequentially compounded and stacked layer composite units, each group of layer composite units being sequentially compounded and stacked by a Cu film, a Si3N4 film and a FeCoCrNiMn film, and the thickness of the Cu film is 30-100 nm, the thickness of the Si3N4 film is 5-15 nm, and the thickness of the FeCoCrNiMn film is 20-60 nm; the Cu-Si3N4-FeCoCrNiMn nanolayer composite material combines the high thermal conductivity and electrical conductivity of Cu, the high hardness and high-temperature resistance of Si3N4 ceramic, and the excellent mechanical properties of FeCoCrNiMn high-entropy alloy, and realizes multi-scale synergistic reinforcement. The Cu layer serves as a plastic buffer phase, passivates crack propagation and relieves interface stress concentration, the Si3N4 layer can effectively pin dislocation motion and inhibit high-temperature grain boundary sliding, and the high-temperature stability and wear resistance of the material are significantly improved. Moreover, the nanolayer structure can control the average free path of dislocation, fully utilizes the thickness size effect, and improves the strength while maintaining good toughness.

The utility model relates to the technical field of cables, and discloses a high-strength copper-core silver-plated special high-temperature cable, which comprises a conductor and further comprises a conductor shielding layer arranged on the outer side of the conductor, an insulating layer arranged on the outer side of the conductor shielding layer, and an insulating shielding layer arranged on the outer side of the insulating layer. The inner protection layer is arranged on the outer side of the insulation shielding layer, and an outer protection layer is arranged on the outer side of the inner protection layer; according to the utility model, fluoroplastic (such as PTFE and FEP) is used as the insulating layer, the long-term tolerable temperature can reach more than 200 DEG C, the chemical corrosion resistance is strong, the high-temperature resistance of the cable is improved, the high-temperature-resistant metal braid layer (such as tinned copper) is used as the outer layer to reinforce mechanical protection, the flexible silica gel is used as the inner layer to improve the bending resistance, and the service life of the cable is prolonged. Corrugated grooves are designed in the inner wall of the protective sleeve, so that the heat dissipation area can be increased; the heat conduction filling material boron nitride filling material is embedded in the protection sleeve so that internal heat conduction efficiency can be enhanced and heat radiation efficiency in the cable can be enhanced.

The application discloses a novel martensitic stainless steel plate for key equipment of nuclear power unit, and relates to the material and metallurgical technology field, which comprises the following components in percentage by mass: C: 0.07%-0.15%, Mn: 0.6%-1.50%, Ni: 0.5%-1.5%, Cr: 12%-19%, Mo: 1.00%-2.00%, Cu: 0.01%-0.2%, TiO2: 0.0001%-0.0010%, V: 0.03%-0.30%, Ti: 0.01%-0.20%, Ca: 0.0001%-0.0011%, and the balance is Fe and inevitable impurities. The stainless steel plate produced by combining smelting, casting blank heating, rolling and heat treatment with reasonable component design has the advantages of large thickness, high strength, low hardness, high-temperature resistance and low-temperature resistance, and meets the high-end use requirements.

This utility model relates to the field of circuit board performance testing technology, and proposes a circuit board chip temperature resistance testing device, including: a frame, an isolation shell located in the center, and a base located below the frame. The inner wall of the isolation shell of the frame is fixedly connected to a test shell. A fan draws external gas into the heating shell through an air supply pipe, guides the gas flow through a guide plate, and heats the gas inside the heating shell through a heating wire. Then, the hot gas enters from the top of the test shell through a second delivery pipe, and simultaneously enters the chamber where the circuit board chip is placed in the test shell through an airflow port on the surface of the partition. In addition, a semiconductor cooler lowers the temperature of the gas in the cooling shell, and then the low-temperature gas enters from the top of the test shell through a first delivery pipe, and simultaneously enters the chamber where the circuit board chip is placed in the test shell through an airflow port on the surface of the partition. In summary, this application provides a method for testing the performance of circuit board chips in both high-temperature and low-temperature environments.

The invention provides a device for assisting packaging and column planting of a ceramic column grid array and a manufacturing method of the device, and relates to the field of microelectronic packaging manufacturing and assembling. The problems that according to an existing column planting device, a resin piece is prone to deformation at high temperature, a metal piece and ceramic thermal expansion are not matched, stress warping is prone to being generated, welding column positioning precision and perpendicularity are insufficient, multi-specification chips are poor in universality, and high-temperature stability and micron-level positioning are difficult to consider at the same time are solved. According to the invention, the rigid-flexible coupling structure of the AlSi10Mg aluminum alloy shell and the resin plug board with the temperature resistance of not less than 210 DEG C is adopted, and the double-layer boss and the through hole array are matched, so that the precise positioning of the welding column is realized, chips of multiple specifications are adapted, and high-temperature stability and micron-sized alignment are both considered.

The invention provides heat-conducting silicone grease for spaceflight electronic equipment and a preparation method of the heat-conducting silicone grease. The heat-conducting silicone grease is prepared from the following components in parts by weight: 3-8 parts of ethyl silicone oil with the viscosity of 50-1000 mPa.s, 3-8 parts of phenyl silicone oil with the viscosity of 50-1000 mPa.s, 1-5 parts of modified silicone oil, 60-80 parts of zinc oxide with the particle size of 2-7 microns and 15-25 parts of zinc oxide with the particle size of 0.1-1 micron. The invention aims to provide the heat-conducting silicone grease which has high heat-conducting property, good low-temperature resistance and cosmic ray resistance and is stable and reliable, so that the heat dissipation requirement of spaceflight electronic equipment in an extreme space environment is met, and the effective thermal design of the prepared heat-conducting silicone grease can greatly prolong the service life of a spacecraft and improve the working reliability of the spacecraft.

The present invention relates to the field of carbon-ceramic composite materials, in particular to a non-dense carbon-ceramic friction material, and a preparation method therefor and the use thereof. The non-dense carbon-ceramic friction material is obtained by subjecting a C / C-Si green body to a silicon infiltration treatment using silicon powder. The raw materials for preparing the C / C-Si green body comprise chopped carbon fibers, graphite powder, a ferrosilicon mixture, silicon carbide powder, boron nitride powder, and phenolic resin powder. The non-dense carbon-ceramic friction material is made to have a porosity of 15-25 vol.%, a high-temperature resistance limit of 1350°C and a compressive strength of 80.5 ± 2.4  MPa; therefore, a friction plate prepared therefrom exhibits a wear amount of 52.8-95.0  μm and a friction coefficient of 0.6-0.7 in an AK master program test. Compared with friction materials in the prior art, the non-dense carbon-ceramic friction material has the advantages of a non-dense structure, a light weight, high-temperature resistance, etc.

The invention discloses a high-temperature-resistant thermal control film and a preparation method thereof, relates to the technical field of thermal control materials, and aims to solve the problems that the high temperature resistance, the mechanical strength and the component compatibility of a traditional thermal control film are difficult to consider at the same time, and the aging resistance and the environmental corrosion resistance are poor. The preparation method comprises the following steps: by taking polytetrafluoroethylene and fluorinated ethylene propylene as matrixes, firstly preparing silicon-fluorine modified graphene and a modified cross-linking agent, and then preparing a product through the steps of preparation of fluoroalkene grafted graphene composite powder, preparation of pre-crosslinking type mixed slurry, film casting and stepped drying, cross-linking curing, segmented post-curing and the like. Through synergistic modification, a compact three-dimensional cross-linked network is constructed, and process optimization is matched, so that the prepared film has excellent high-temperature-resistant stability, mechanical strength, heat insulation and temperature control effects and flame retardance, and can be widely applied to the fields with strict requirements on thermal control materials, such as aerospace, electronic and electrical engineering and the like.

A method for preparing a sealing ring material for ultra-supercritical steam turbines belongs to the field of metallic materials. A master alloy is prepared by vacuum induction melting, followed by gas-supported electroslag remelting to obtain an electroslag ingot. The composition of the electroslag ingot is (3.5–4 wt%) Fe, (7.5–8 wt%) Mn, (1.8–2.0 wt%) Nb, (1.5–1.8 wt%) Si, (1.9–2.1 wt%) Ti, (17–18 wt%) B, with the remainder being Co. The electroslag ingot is then processed into a sealing ring blank of the required size using conventional hot deformation technology, held at 250–280°C for 60–90 minutes, and then precision-machined to obtain the finished sealing ring. The material of this invention exhibits excellent wear resistance, corrosion resistance, and high-temperature resistance. Two highly hard submicron-scale dispersed reinforcing phases are formed in the Co matrix. These two reinforcing phases possess high hardness and high strength, and are small in size, ensuring excellent high-temperature resistance of the sealing ring. At application temperatures above 400°C, some Co... 54 B 40 Fe6 can dissolve into the matrix, causing the amorphous matrix lattice to expand, which is beneficial to improving the sealing performance of the sealing ring.

The invention discloses a light collimator based on magnetic particles and low-melting-point glass and a manufacturing method thereof. The manufacturing method comprises the following steps: uniformly mixing a low-melting-point glass raw material and the magnetic particles; the melting point of the low-melting-point glass is 300 DEG C to 500 DEG C; placing the obtained mixture in a heating device, and controlling the heating temperature to be within the melting point range of the low-melting-point glass raw material and to be lower than the Curie temperature of the magnetic particles; then adding a dispersing agent; pouring the uniformly mixed solution into a mold, and placing the mold in a uniform magnetic field with an unchanged magnetic field direction, so that the magnetic particles are arranged into a plurality of chain-shaped aggregates parallel to the magnetic field direction under the action of the magnetic field, and the chain-shaped aggregates are parallel to one another; and after complete cooling and solidification, the magnetic field effect is removed, and the optical collimator based on the magnetic particles is manufactured. Therefore, the technical problems that an existing optical collimator is poor in high temperature resistance and corrosion resistance and limited in light-transmitting wave band are solved.

This invention provides a device and method for magnetic field-assisted plasma modification of laser cladding coatings under ultra-high pressure. A nickel-based alloy substrate is placed in a sealed working chamber. Inert gas is continuously injected into the sealed working chamber to maintain an ultra-high pressure environment. A molten pool is formed by laser irradiation of nickel-based alloy powder deposited on the surface of the substrate. Simultaneously, metal plasma is used as an element dopant in the nickel-based alloy coating. The metal plasma is sprayed onto the surface of the nickel-based alloy substrate, and the plasma-state active element dopant accumulates on the surface of the molten pool under the control of a magnetic field. Under the synergistic effect of the ultra-high pressure environment and the alternating magnetic field, the metal plasma penetrates into the molten pool and reacts with the molten material, resulting in a nickel-based alloy cladding coating with uniform active element doping. This invention achieves effective doping of the active element Hf into the nickel-based alloy coating, improving the coating's high-temperature resistance.

The invention relates to the field of coating materials, in particular to a coating material, a coating base material, application of the coating material, a preparation method of the coating base material and a hydrocarbon source rock thermal simulation method. According to the total mass of the coating material, the coating material comprises the following components of 0.1 wt%-5 wt% of manganese, 3 wt%-4 wt% of niobium and tantalum, 1 wt%-3 wt% of copper, 0.02 wt%-1.8 wt% of carbon, 0.01 wt%-3 wt% of silicon, 83.19 wt%-95.86 wt% of chromium and gold and not larger than 0.01 wt% of iron and / or titanium. The coating material disclosed by the invention has excellent high temperature resistance, high pressure resistance and corrosion resistance.

The invention belongs to the field of alloys, and particularly discloses a high-strength heat-resistant aluminum alloy conductor material and a preparation method thereof. The aluminum alloy conductor material is prepared from the following components in percentage by mass: 0.5 to 1.2 percent of Fe, 0.10 to 0.15 percent of Zr, 0.01 to 0.03 percent of B, 0.01 to 0.04 percent of RE, 0.005 to 0.01 percent of Sr, less than or equal to 0.15 percent of inevitable impurities and the balance of Al. RE is selected from at least one of La and Ce. The aluminum alloy conductor material has high iron content, and the type, morphology and distribution of an iron-rich phase in aluminum alloy are improved by introducing low-content Sr and RE elements, so that the aluminum alloy conductor material has high room-temperature tensile strength, excellent electric conductivity and good high-temperature resistance.

The invention discloses a fiber grating displacement sensor and system for an ultra-high temperature environment. The sensor comprises a shell, a displacement input piece, a displacement-strain conversion assembly and a high-temperature sensing core body. A displacement measuring grating and a temperature reference grating are arranged in the core body, and non-adhesive high-temperature anchoring components are integrated at two ends of the core body; the measuring grating is stress-coupled, and the reference grating is mechanically isolated and is in the same temperature field. The demodulation unit collects the central wavelengths of the two gratings and carries out difference / weighted difference, and temperature drift is eliminated to obtain displacement. The scheme is suitable for being larger than or equal to 1000 DEG C, and temperature resistance and reliability can be improved through grating types and material selection.

The invention discloses a metallurgical-defect-free high-temperature wear-resistant cobalt-based alloy coating and a preparation method and application thereof.The preparation method comprises the following steps that (1) Fe powder, Co powder, Cr powder, Ti powder, Mo powder and Ni powder are accurately weighed according to the stoichiometric equation Co57Fe5Ni5Cr25Ti5Mo3, and (2) the weighed powder is put into a ball milling tank to be subjected to ball milling, so that the powder is evenly mixed, and then drying, sieving and drying storage are conducted; (3) 5NiCrMo hot work die steel is selected as a base material, a sand mill is used for polishing the surface of the base material so as to remove surface oxide skin until a bright surface is exposed, and oil stains on the surface are removed; and (4) a laser directional energy deposition method in laser additive manufacturing is used for continuously depositing the crack-free cobalt-based alloy coating with high temperature resistance, wear resistance and no cracks one by one. The high-temperature wear-resistant alloy shows excellent wear resistance at a high temperature, the alloy has a shallower wear depth and a narrower grinding crack width at the high temperature, and the wear rate at the high temperature of 800 DEG C is reduced from 2.171 * 10 <-4 > mm < 3 > / N.m of a 5CrNiMo base material to 2.45 * 10 < 6 > mm < 3 > / N.m of a coating.

The utility model discloses a kind of sealing structure suitable for high temperature / low temperature environment, it is related to sealing technical field, specifically includes: solar water heater, drain pipe, connecting pipe, the outer surface of drain pipe and connecting pipe is equipped with sealing mechanism, the sealing mechanism is used to seal protection and detection treatment to the connecting place of drain pipe and connecting pipe, to assist adaptation high-low temperature environment.This device is by the adsorption of left magnetic plate and right magnetic plate in sealing mechanism, so that the silicon rubber inside left half circle sleeve pipe and right half circle sleeve pipe can be closely fitted in the connecting place of pipeline, complete sealing, by the high temperature resistance and material flexibility of silicon rubber itself, in the case of high and low temperature, can assist to strengthen the protection of pipeline connecting place, avoid the problem of sealing failure caused by temperature change in pipeline connecting place.This device can detect whether there is the problem of leakage in connecting place by the water absorption function of water absorption expansion block in detection component.

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.