49results about How to "Excellent hydrogen resistance" patented technology

There is prepared an optical fiber preform 2 whose core region is doped with Ge in such a quantity of dopant that the relative refractive-index difference [Ge] expressed in % with respect to pure SiO₂ satisfies the condition [Ge]≧0.3%, where upon after being heat drawn with a drawing furnace 11 into an optical fiber 3, the optical fiber 3 is annealed in a heating furnace 21 downstream of the drawing furnace 11 under a condition that the cooling speed is 2000° C./second or less, and the period of annealing time is equal to or longer than the relaxation time. Further, the annealed optical fiber 3 is introduced into a cooling means 31 at an entry temperature of 700° C. or more, and the optical fiber 3 is forcibly cooled by the cooling means 31. As a consequence, there are achieved an optical fiber and a method of fabricating the same capable of fabricating the optical fiber having a reduced Rayleigh scattering loss as well as excellent hydrogen-resisting property with favorably high productivity.

Hydrogen embrittlement is prevented in Sm₂Co₁₇-based magnets and R₂Fe₁₄B-based magnets by metal plating the magnet, then carrying out heat treatment, or by forming a metal oxide or metal nitride layer on the metal plating layer or directly on the magnet itself.

The invention discloses a two-dimensional material adjusting and controlling silicon-carbon composite structure hydrogen resisting coating. The two-dimensional material adjusting and controlling silicon-carbon composite structure hydrogen resisting coating is characterized in that a coating structure comprises a silicon-carbon compound and a two-dimensional material; a two-dimensional material coating is formed by stacking graphene of a two-dimensional structure or hexagonal boron nitride of a two-dimensional structure or molybdenum disulfide of a molybdenum disulfide layer by layer, the layer number ranges from 1 to 10, and the thickness of the two-dimensional material coating ranges from 0.34 nm to 28 nm; and the silicon-carbon compound is formed by sputtering a silicon carbide target material, and the thickness of the silicon-carbon compound ranges from 0.5 micron to 2 microns. A preparing method of the two-dimensional material adjusting and controlling silicon-carbon composite structure hydrogen resisting coating includes the step that the two-dimensional material is prepared by adopting a chemical vapor deposition (CVD) technology and an ion beam sputtering deposition (IBSD) technology and with the combination of an etching transferring technology. A composite coating technology is adopted and has a hydrogen resisting effect superior to that of a single coating; introduction of the two-dimensional material is brought forwards for the first time on the basis of an original silicon-carbon compound hydrogen resisting coating; and by the adoption of an existing technological method, composite structures of different forms are designed and prepared, and the layer number is taken into consideration.

The invention provides a cable which comprises at least one optical fiber (1), a fiber paste layer (2), a first protective layer (3), a hydrogen blocking layer (4) and a second protective layer (5), wherein the fiber paste layer (2), the first protective layer (3), the hydrogen blocking layer (4) and the second protective layer (5) are sequentially wrapped on the surface of the optical fiber (1) from inside to outside. The invention further provides a manufacture method of the cable. The method includes: sequentially forming the fiber paste layer (2), the first protective layer (3), the hydrogen blocking layer (4) and the second protective layer (5) on the surface of the optical fiber (1) from inside to outside. The cable has excellent hydrogen blocking performance and can meets the requirements of being used in severe environment under wells.

The invention relates to an Y2O3/Al2O3 composite gradient hydrogen resistant coating and a preparation method thereof. The coating is used for resisting hydrogen permeation in a high-temperature vacuum collector tube. The composite gradient hydrogen resistant coating is composed of the stainless steel tube and an Y2O3/Al2O3 composite coating which is applied on an inner surface of the stainless steel tube. The composite coating is prepared through a metal-organic chemical vapor deposition method, wherein an Al2O3 coating and an Y2O3 coating are deposited repeatedly on the inner surface to form the multilayer Y2O3/Al2O3 composite gradient hydrogen resistant coating being 0.1-20 [mu]m in thickness. The coating is in a multilayer alternated structure with the most inner layer being Al2O3 and the most outer layer being Y2O3. The hydrogen resistant coating is strong in combination strength with a substrate, is simple in preparation process and is low in cost, and is improved in hydrogen resistant performance by more than 200 times.

The invention discloses a metal uranium surface water-blocking hydrogen-blocking Al/Al2O3 composite plating layer and a preparing method thereof. The purpose is to develop the corrosion-resistant plating layer which has high density and particularly can effectively block water and hydrogen penetration so as to solve the problem about surface corrosion of metal uranium materials. The composite plating layer uses uranium as a base body and is formed by alternately depositing an Al plating layer and an Al2O3 plating layer. According to the composite plating layer and the preparing method, the aluminum oxide plating layer has a function of closing pores of the aluminum plating layer, and the following effects are achieved, wherein on one hand, introduction of the aluminum oxide plating layer prevents continuous growth of columnar grains of the aluminum plating layer, so that penetrating holes and defects in the plating layer are greatly reduced, the compactness of the plating layer is improved, and the number of permeation channels of corrosive media such as water and hydrogen is significantly reduced; and on the other hand, aluminum oxide is of a dense structure, is stable in performance and low in hydrogen permeability and can more effectively block penetration of small atomic size corrosion media such as hydrogen, and the protection performance of the plating layer on the base body is improved. It is determined that the composite plating layer can effectively block penetration of environmental atmospheres such as the water and the hydrogen on the uranium.

The solid lubricating agent contains MoS2, and is characterized by that it also contains (wt%) 0.3%-3% of Ca-S dispersing agent, 0.15-2% of ZnDTP antioxidant, 0.25%-2% of PIB tack producer, 0.15%-2% of SI-P antiform additive, and 0.15%-2% of P.P cleaning agent. It not only can reduce friction and wear, but also can greatly prolong the service life of parts, and can save fuel and engine oil, and can reduce discharge of tail gas, and can remove dampness and rust from parts to protect parts. Said solid lubricating agent possesses excellent high temp. resistant and high pressure resistant properties, can be used in the machine with explosive friction, and possesses excellent lubricating action at high and low temp. environments.

The invention discloses a corrosion-resistant shake-proof hammer and a surface treatment technique thereof and relates to the technical field of shake-proof hammers of power transmission equipment. The corrosion-resistant shake-proof hammer is composed of, by mass, 0.35%-0.87% of carbon, 0.75%-2.58% of silicon, 12.25%-15.87% of chromium, 3.6%-5.3% of nickel, 0.8%-1.2% of molybdenum, 5.2%-12.6% of manganese, 0.005%-0.009% of niobium, 2.3%-3.5% of aluminum, 3%-8% of copper and the balance ferrum. The corrosion-resistant shake-proof hammer has the advantages of being large in density and good in shake-proof effect; and by spraying a surface coating on the shake-proof hammer, the corrosion resistance and abrasion resistance of the shake-proof hammer are remarkably improved, and thus the service life of the shake-proof hammer is remarkably prolonged.

The invention relates to the field of permanent magnet materials, and discloses a high-temperature-resistant and hydrogen-resistant samarium-cobalt permanent magnet motor which comprises a rotor body (1); a rotor spline shaft (2), assembled at the axis of the rotor body; a plurality of samarium cobalt permanent magnets (3) which are uniformly embedded in the rotor body; a stator body (4), arranged on the outer side of the circumferential surface of the rotor body; an air gap (5), formed between the rotor body and the stator body; and a plurality of stator coils (6), uniformly embedded in the inner circumferential surface of the stator body. According to the permanent magnet motor, the samarium cobalt permanent magnets with excellent hydrogen resistance and high temperature resistance are adopted, so that the use of the permanent magnet motor in a high-temperature and high-pressure pure hydrogen environment is ensured.

The invention provides a photoelectric composite cable for an oil well. The photoelectric composite cable comprises an optical unit, a conductive layer, a high-temperature resistant insulation layer and an external steel pipe, wherein the conductive layer wraps a surface of the optical unit and is formed by laser continuous welding, the high-temperature resistant insulation layer is formed outside the conductive layer by continuous extrusion, and the external steel pipe wraps the high-temperature resistant insulation layer. In the photoelectric composite cable, the optical unit and the conductive layer are of a coaxial structure, the space in the pipe of the photoelectric composite cable is effectively utilized, so that an optical fiber can have an enough space and the extra length of the optical fiber can be extended to be adaptive to thermal expansion extension of the optical cable or external tensile stress; and meanwhile, the thickness of the insulation layer outside the conductive layer can also be increased, and the insulativity of the conductive layer can be improved. The invention also provides a manufacturing method of the photoelectric composite cable.

The invention discloses a composite proton conductive ceramic electrolyte film as well as a preparation method and application thereof. The film is formed on the surface of a ceramic tube and is a composite film formed by alternately compounding multiple layers of film materials SrCe<1-x>Yb<x>O<3-alpha> and SrCe<1-x>Er<x>O<3-alpha>, the innermost layer is the SrCe<1-x>Yb<x>O<3-alpha> film, and theoutermost layer is the SrCe<1-x>Er<x>O<3-alpha> film. The preparation method comprises the following steps: (1) carrying out ultrasonic cleaning on the surface of the ceramic tube for 15-30 minutes,and drying; and (2) sequentially and alternately forming a SrCe<1-x>Yb<x>O<3-alpha> film and a SrCe<1-x>Er<x>O<3-alpha> film on the surface of the ceramic tube by adopting a metal organic chemical vapor deposition technology, and finally obtaining the multi-layer SrCe<1-x>Yb<x>O<3-alpha>/SrCe<1-x>Er<x>O<3-alpha> composite proton conductive ceramic electrolyte film. According to the preparation method, the preparation of the composite proton conductive ceramic electrolyte film alternately formed by SrCe<1-x>Yb<x>O<3-alpha> and SrCe<1-x>Er<x>O<3-alpha> is realized on the surface of the ceramic tube for the first time, and the film is good in combination with a matrix, high in compactness, uniform, stable and excellent in hydrogen resistance.

The invention provides an anti-hydrogen material and a preparation method thereof, and the preparation method comprises the following steps: (1) controlling the content of dissolved hydrogen in molten steel to be 8-20 ppm during smelting, and when the content of Ca is lower than 5 * 10 <-12 > ppm, adding Mg into the molten steel until the content reaches 5 * 10 <-6 >-7 * 10 <-5 > ppm; (2) reducing the hydrogen content in the molten steel to 3 ppm or below by adopting an AOD furnace and a VD furnace; (3) carrying out secondary remelting by adopting electroslag; (4) the electroslag ingot is forged, the initial forging temperature ranges from 1140 DEG C to 1250 DEG C, the final forging temperature ranges from 900 DEG C to 1050 DEG C, and the forging heating rate ranges from 80 DEG C/h to 100 DEG C/h; and (5) hot rolling is conducted after cogging, the heating temperature during hot rolling ranges from 1120 DEG C to 1250 DEG C, the initial rolling temperature ranges from 1080 DEG C to 1180 DEG C, and the final rolling temperature ranges from 900 DEG C to 1050 DEG C. The obtained material is excellent in hydrogen resistance, low in hydrogen content and oxygen content, low in inclusion content and excellent in room temperature performance.