61 results about "Atomic ratio" patented technology

The invention belongs to the technical field of analysis of single particles, and particularly discloses a method for detecting the atomic number ratio of multiple elements in a single particle in a nano material, which can synchronously collect ion signals of all the elements in the single particle, accurately measure the intensity of each element in a transient signal, and improve the detection accuracy. A novel data processing method, namely a statistical distribution fitting method, is adopted, so that the real and accurate multi-element atomic ratio is calculated, and the inherent defects of the traditional SP-ICP-MS and TEM technologies are overcome; meanwhile, the problem that part of nano-particles are unstable in a water phase is solved through an organic phase oxygen adding and sampling method.

This invention relates to a high-strength, high-hardness, lightweight, high-entropy alloy and its preparation method, specifically to a high-strength, high-hardness, lightweight, high-entropy alloy and its preparation method. The aim is to address the insufficient room-temperature strength and hardness of existing as-cast lightweight high-entropy alloys. The formula for this lightweight high-entropy alloy is (AlNbTiVCr). 100‑x B x Preparation method: 1. Weigh the raw materials according to the atomic ratio expressed in the formula; 2. Place the raw materials on the crucible of a vacuum non-consumable arc furnace; 3. Before melting, turn on the circulating cooling water, and separately place sponge titanium and aluminum particles in the crucible. After evacuating the vacuum, under the protection of an inert gas, first melt the sponge titanium and aluminum particles, and then melt (AlNbTiVCr) with different cobalt contents in sequence. 100‑x B x After melting, the ingot sample is cooled to obtain a button ingot sample; fourth, the button ingot sample is repeatedly melted and cooled to obtain a lightweight high-entropy alloy. This invention is used to prepare lightweight high-entropy alloys.

The invention provides a method for calculating the oxidation rate of low-melting-point metal (Bi) by using a Raman spectrum. By controlling the sintering temperature of the metal Bi and using the Raman spectrum peak ratio, the oxidation rates of the metal Bi at different temperatures are calculated. Through contrastive analysis, the result is consistent with the results of differential thermal thermogravimetry, X-ray diffraction analysis and the oxidation rate of the atomic ratio of a scanning electron microscope, but Raman spectrum analysis is simpler, more convenient and more accurate. The method is mainly applicable to the field of material detection and analysis.

This invention relates to a coated cutting tool having at least one rake face and at least one flank face and a cutting edge therebetween. The coated cutting tool comprises a substrate and a coating comprising a (Ti,Al)N layer. The (Ti,Al)N layer is a single monolayer or a multilayer of two or more alternating (Ti,Al)N sublayers with different compositions. The total atomic ratio of the (Ti,Al)N layer, Al / (Ti+Al), is >0.67 but ≤0.85. The (Ti,Al)N layer exhibits a plane strain modulus distribution along a direction perpendicular to the cutting edge on the rake face and / or the flank face. The plane strain modulus at a point 0.5 mm away from the cutting edge is greater than 85% of the plane strain modulus at the cutting edge, and the plane strain modulus at the cutting edge is ≥450 GPa.

Provided is a catalyst metal particle containing Rh as a main component that can improve catalytic activity and a catalyst containing the catalyst metal particle. The catalyst metal particle according to the present disclosures includes a composition in terms of atomic ratio represented by the formula RhxIryPtz, wherein x+y+z=100, 40≤x≤80, 10≤y≤40, and 10≤z≤40.

A coated cutting tool is provided with a hard coating film on a base material. The hard coating film is composed of a nitride or carbonitride containing 50 at% to 70 at% (inclusive) of Al, 20 at% to 50 at% (inclusive) of Cr, and 4 at% to 15 at% (inclusive) of Si with respect to the total amount of metal including semimetal. The atomic ratio (at%) A of a metal element including a semimetal and the atomic ratio (at%) B of nitrogen in the hard coating satisfy 1.07 lt; b / Alt; 1.30, 1.30. The hard coating film exhibits a maximum peak intensity caused by a (200) plane or a (111) plane of a cubic crystal in an intensity distribution determined from an X-ray diffraction pattern or a selected area diffraction pattern of a transmission electron microscope, and does not have a peak mainly composed of a hexagonal crystal in the intensity distribution determined from the selected area diffraction pattern.

An alloy for a hydrogen-resistant member to be used in a hydrogen-resistant member having resistance to hydrogen embrittlement comprises a fundamental component composed of one or more iron group elements, and a low-hydrogen-affinity component composed of one or more metal elements of a metal element group having a lower affinity for hydrogen than the iron group elements. The average value of the enthalpy of mixing with hydrogen, which is calculated based on the enthalpy of mixing with hydrogen and atomic ratio of each of all metal elements contained in the chemical composition of the alloy for a hydrogen-resistant member, is −20 [kJ / mol] or greater.

The invention discloses an in-situ generated high-entropy particle reinforced magnesium-based composite material and a preparation method thereof, the composite material comprises Mg, Y, Dy, Ho and Er elements, the atomic ratio of Mg / Y + Dy + Ho + Er is greater than 10: 1, and the atomic ratio of Y to Dy to Ho to Er is 1: 1: 1: 1. The atomic ratio of Mg / Y + Dy + Ho + Er is larger than 10: 1, the atomic ratio of Y, Dy, Ho and Er is 1: 1: 1: 1: 1, Mg24 (Y0.25 Dy0.25 Ho0.25 Er0.25) 5 high-entropy particles can be generated after rare earth atoms are subjected to solid solution, the high-entropy particles serving as reinforcements have high strength and high hardness, and the strength and hardness of the composite material can be remarkably improved; meanwhile, in-situ synthesized Mg24 (Y0. 25Dy0. 25Ho0. 25Er0. 25) 5 high-entropy particles and an Mg matrix form a coherent interface, dislocation can be extended, plastic deformation of the material is coordinated, and when the room temperature of the prepared composite material is 25 DEG C, the yield strength is 212 MPa, the tensile strength is 361 MPa, the Vickers hardness is 107 Hv, and the ductility is 10.6%; the high-entropy particle reinforced Mg-based composite material is generated in situ, so that the room-temperature strength and ductility of the alloy can be synergistically improved.

This invention relates to the field of alloy materials and metallurgical processing technology, and discloses an alloy, its preparation method, and its uses. The alloy comprises the following components by mass percentage: Ni: 22.0–28.0%; Al: 3.0–5.0%; Mn: 1.0–3.5%; Fe: 0.2–1.5%; Cr: 0.1–0.8%; Si: 0.05–0.30%; Ti: 0.05–0.50%; Zr: 0.02–0.20%; the balance being Cu and unavoidable impurities, and the atomic ratio of Ni to Al in the alloy is 2.6–3.3. The tensile strength, yield strength, and elongation of the alloy at room temperature are significantly improved.

The application discloses a catalyst for preparing acrylonitrile through propylene ammoxidation and a preparation method and application thereof. An active component of the catalyst comprises La, Q and R, R is at least one of Ce, Pr, Nd, Sm and Eu elements, and Q is at least one of Zr, Ca, Ti and P elements; an atomic ratio of the La to the R is 0.05-0.45, and an atomic ratio of the Q / (La+R) is 0.01-0.25. When the catalyst is used for preparing acrylonitrile through propylene ammoxidation, the catalyst has the characteristics of high activity and low two-carbon yield in a long-period running process.

The invention aims at providing a preparation method and application of a Pt-N-C catalyst with the N atomic ratio of pyridine to pyrrole being 1 / 1, and belongs to the technical field of electro-catalytic materials and alkaline electrolytic water hydrogen production. ZIF-8 and ZIF-67 serve as precursors, the proportion of Zn / Co is adjusted, then pyrolysis is conducted at the temperature of 920 DEG C in the H2 / Ar atmosphere, the reaction that H2 and C are hydrogenated into methane at the high temperature is utilized, and the Pt-N-C catalyst with the N atomic ratio of pyridine to pyrrole being 1 / 1 is obtained. According to the method, pyrrole N (N5) and pyridine N (N6) are used as raw materials, carbon ring reconstruction is catalyzed by means of Co nanoparticles (Con) generated in situ, the proportion of pyrrole N (N5) to pyridine N (N6) is close to 1: 1, Pt single atoms are anchored through N coordination, and the Con-Pt1 (at) N [5] / [6] C catalyst is prepared. The catalyst has high activity and high stability, the overpotential is as low as 17 mV and is superior to that of commercial Pt / C, and the catalyst can stably run for 400 hours under the conditions of 70 DEG C and 1A / cm in an anion exchange membrane water electrolyzer (AEMWE).

The present invention provides a composite particle that can achieve both high silicon utilization and oxidation inhibition during water dispersion. The composite particle of the present invention is a composite particle having a particle containing carbon material and silicon, and a coating layer containing carbon and oxygen on the surface of the particle, and has a true density of 1.80 to 1.99 g / cm 3 In the Raman spectrum, a peak exists at 450 to 495 cm ‑1 If the intensity of the peak is I Si , and the intensity of the G band is I G , then I Si / I G is 1.3 or less, and in X-ray photoelectron spectroscopy, if the atomic ratios of Si, O, and C are A Si , A O , and A C , and the ratios of SiO2 and SiO are B SiO2 , B SiO , then A Si is 0.05 or more, and I Si / I G and A C / (A C +A Si ×(B SiO2 +B SiO )) have a prescribed relationship.

A magnetic powder contains Sm, Zr, Fe, B, and N. An atomic ratio of a content of Zr to a sum of a content of Sm and the content of Zr is greater than 0.10 and smaller than 0.30. A content of B is greater than 0.0 atom% and smaller than 0.4 atom%.

Catalyst comprising an active phase comprising copper and a Group IIIA element and an alumina support, the copper content being between 0.5 and 25 wt%, based on copper element, relative to the total weight of the catalyst, the atomic ratio of copper to Group IIIA element being between 1 and 50 mol / mol, characterized in that the support is provided in the form of beads or extrudate having a specific surface area between 10 and 250 m2 / g.

The invention provides a CoCrNi-based high-entropy alloy material and a preparation method of the CoCrNi-based high-entropy alloy material. The chemical expression of the CoCrNi-based high-entropy alloy material is as follows: (CoCrNi) (100-x-y) Al < x > Ti < y >, wherein the atomic ratios of Co, Cr and Ni are the same, the value of x is more than or equal to 5 and less than or equal to 10, and the value of y is more than or equal to 5 and less than or equal to 10. According to the CoCrNi-based high-entropy alloy material, Al and Ti are introduced into the CoCrNi-based high-entropy alloy material, and an FCC + L12 + BCC + B2 four-phase heterostructure is formed by accurately regulating and controlling the content of Al and Ti elements and the type, particle size and distribution of a precipitated phase. The L12 precipitated phase size of the (CoCrNi) 90Al5Ti5 alloy is about dozens of nm; along with the increase of the contents of Al and Ti, the size of an L12 precipitated phase is gradually reduced. The CoCrNi-based high-entropy alloy material is high in yield strength, low in alloy corrosion current density and good in ductility.

The invention provides a Ti8AlSn-based alloy and a preparation method thereof, the alloy is a titanium-based intermetallic compound material taking a Ti8AlSn phase as a matrix, and the alloy comprises the following components in percentage by atom: 5%-15% of Al, 5%-15% of Sn and the balance of Ti and inevitable impurity elements. The Ti8AlSn phase is an ordered phase of a close-packed hexagonal structure, and the atomic ratio of Ti to Al to Sn is 8: 1: 1. The preparation method of the alloy comprises the steps of raw material preparation, vacuum consumable smelting and heat treatment. After the alloy prepared according to the design concept is subjected to heat treatment, the room-temperature hardness value of a matrix is not lower than 420 HV.

The invention discloses high-toughness corrosion-resistant iron-based self-fluxing alloy powder which comprises the following chemical components in percentage by mass: 17.00 to 19.00 percent of Cr, 1.50 to 1.70 percent of B, 1.20 to 1.50 percent of Si, 0.80 to 1.20 percent of Ni, 1.80 to 2.00 percent of Mo, 0.20 to 0.28 percent of C, 0.10 to 0.30 percent of Mn, 0.12 to 0.22 percent of V, 0.25 to 0.45 percent of Ti, 0.05 to 0.10 percent of Nb, 0.04 to 0.10 percent of N and the balance of Fe and inevitable impurities. Wherein the atomic ratio Ti / N of Ti to N is 1.5: 1-4.0: 1, and the atomic ratio (V + Nb) to C of (V + Nb) to C is 0.25: 1-0.5: 1. According to the high-toughness corrosion-resistant iron-based self-fluxing alloy powder disclosed by the invention, a cladding layer has excellent corrosion resistance, wear resistance, plasticity and toughness and cold and hot fatigue resistance while stably reaching high hardness of 55-60 HRC.

A magnetic powder contains Sm, Zr, Fe, B, and N. An atomic ratio of a content of Zr to a sum of a content of Sm and the content of Zr is greater than 0.10 and smaller than 0.30. A content of B is greater than 0.0 atom % and smaller than 0.4 atom %.

A cutting tool includes a substrate and a hard layer disposed on the substrate. The hard layer comprises a first unit layer and a second unit layer, wherein the first unit layer and the second unit layer are alternately stacked in one or more layers. The thickness of the first unit layer is 2 nm or more and 100 nm or less, and the thickness of the second unit layer is 2 nm or more and 100 nm or less. The first unit layer is made of Ti. a Al b B c The compound shown in N is composed of the second unit layer, which is made of Ti. d Al e B f The compound represented by N is composed of the above Ti. a Al b B c The atomic ratio 'a' of titanium in N is greater than 0.25 and less than 0.45. The aforementioned Ti... a Al b B c The atomic ratio of aluminum in N is greater than or equal to 0.55 and less than 0.75. The above-mentioned Ti... a Al b B c The atomic ratio c of boron in N is greater than 0 and less than 0.1, and the total of the above atomic ratios a, b, and c is 1. The above Ti... d Al e B f The atomic ratio d of titanium in N is greater than 0.35 and less than 0.55. The above-mentioned Ti d Al e B f The atomic ratio of aluminum in N is greater than 0.45 and less than 0.65, and the above-mentioned Ti d Al e B f The atomic ratio f of boron in N is greater than 0 and less than 0.1. The total of the above atomic ratios d, e, and f is 1. The above atomic ratios a and d satisfy 0.05 ≤ d - a ≤ 0.2. The above atomic ratios b and e satisfy 0.05 ≤ b - e ≤ 0.2.

A method for making an alloy thin film, includes: providing a reaction chamber, wherein a spraying device and a supporting platform are disposed in the reaction chamber; disposing a pre-processed structure on a surface of the supporting platform; forming an alloy thin film with a characteristic atomic ratio of a first element to an M-th element on a surface of the pre-processed structure, wherein the spraying device is set to have a characteristic temperature, a characteristic distance is set between the spraying device and the supporting platform, a flow-stabilizing device is set to have a characteristic flow, a first precursor to an M-th precursor are introduced into the reaction chamber, and M is an integer greater than or equal to 2; and adjusting the characteristic atomic ratio by adjusting any one or more selected from the group consisting of the characteristic temperature, the characteristic distance, and the characteristic flow.

The invention relates to a device comprising a perovskite layer, a hole transport layer, an electron transport layer and a transparent conductive layer arranged on a substrate, the perovskite layer comprising a perovskite compound of formula (I): CsaFAbMacPbdSn (1-d) X3-wherein Cs represents cesium; fA represents-CH (NH2) 2 +-; mA represents-CH3NH3 < + >-; pb represents lead; sn represents tin; x represents I <->, Br <->, Cl <->, F <-> or a mixture thereof; and a, b, c and d represent atomic ratios, wherein a is in the range of about 0.03 to about 0.07; b is in the range of about 0.1 to about 0.7; c is in the range of about 0.1 to about 0.7; d is in the range of from about 0.2 to about 0.8; and a, b, and c satisfy the equation a + b + c = 1. The invention also relates to a method for preparing such a device.

The present invention relates to a photomask blank comprising a transparent substrate and a chromium-containing film. The chromium-containing film consists of a chromium compound layer formed of a chromium compound comprising Cr, N and optionally O and having a composition with a Cr content of > 30 at%, a total content of Cr + N + O of > 93 at% and fulfilling the formula: 3Cr ≤ 2O + 3N. The first composition is: an atomic N / Cr ratio of > 0.95, a Cr content of > 40 at%, a total content of Cr + N of > 80 at% and an O content of ≤ 10 at%.

This invention relates to the field of magnetostrictive materials, specifically to a Ni-Fe-Mn-Ga magnetostrictive alloy and its preparation method, comprising: an alloy with an atomic percentage of Ni. 57‑x Fe x Mn 20 Ga 23 ,in, x The content is: 1≤ x ≤14. This invention is based on the atomic ratio of Ni. 57 Mn 20 Ga 23 By replacing Ni with Fe to introduce point defects, Ni was obtained from the alloy composition. 57‑x Fe x Mn 20 Ga 23 (1≤ x ≤14) alloy system. When Fe replaces Ni, the strength and toughness of Ni-Mn-Ga alloy can be greatly improved; Fe, as a point defect, causes local lattice distortion in the austenitic matrix of the alloy, resulting in the formation of nano-martensite domains with low structural anisotropy and low reorientation energy barrier in the austenitic matrix, which can be generated in low saturation driving fields ( H S Reorientation under these conditions can also yield higher magnetostriction values. l This allows for the attainment of extremely high magnetostrictive sensitivity. l / H S ).

Provided is a surface-treated steel sheet which can be manufactured without using hexavalent chromium and which has excellent corrosion resistance to a BPA-free coated portion. This surface-treated steel sheet is provided with a steel sheet and a chromium-containing layer disposed on at least one surface of the steel sheet, and is characterized in that an oxygen-rich region containing 10% or more of O in terms of atomic concentration exists in the vicinity of the interface between the steel sheet and the chromium-containing layer, and the vicinity is a region in which the atomic ratio of Fe to Cr is in the range of 0.7-1.3.

This invention relates to wires and steel wires that both possess excellent resistance to hydrogen embrittlement and methods for manufacturing the same, and more specifically, to wires that possess excellent resistance to hydrogen embrittlement and comprise, by weight percent: C: 0.20% to 0.40%, Si: 0.20% to 0.50%, Mn: 0.50% to 1.00%, Ti: 0.050% to 0.100%, S: 0.030% to 0.080%, and the balance Fe and unavoidable impurities, wherein the atomic ratio of Ti to S (Ti / S) satisfies the following formula (1), and when the diameter of the wire is D, the microstructure in the region of 1 / 2D to 3 / 2D of the cross-section of the wire comprises 20% to 30% ferrite by area fraction and the balance pearlite, formula (1): 0.5 ≤ (Ti weight) / (Ti mass) / (S weight) / (S mass) ≤ 1.8.

This invention discloses a catalyst for the synthesis of olefins from syngas, its preparation method, and its application. The catalyst, by weight, comprises A) 50-80 parts of a support; B) 20-50 parts of an active component, the active component containing a composition with the following chemical formula on an atomic basis: Co 100 Mn a K 2b Fe b O x The value of 'a' ranges from 30 to 60; the value of 'b' ranges from 1 to 10; and 'x' represents the total number of oxygen atoms required to satisfy the oxidation states of all elements in the catalyst. This catalyst is suitable for the preparation of α-olefins from syngas and has the advantage of high olefin content, especially high α-olefin content, in the product.

The invention relates to a plurality of tin sulfide quantum dots having a mean atomic ratio of tin to sulfur of from 1.1:1 to 10.0:1, a mean diameter of 0.50 nm to 5.00 nm, and which are photoluminescent at wavelengths of (a) 360 to 470 nm, (b) 475 to 545 nm and (c) 550 to 740 nm.

The present invention provides a member which makes is possible to obtain excellent residue defect inhibition properties and excellent bridge defect inhibition properties of a chemical liquid in a case where the member is brought into contact with the chemical liquid. The present invention also provides a container, a chemical liquid storage body, a reactor, a distillation column, a filter unit, a storage tank, a pipe line, and a chemical liquid manufacturing method. The member according to an embodiment of the present invention is a member that will be brought into contact with a chemical liquid. A surface of the member is constituted with stainless steel containing chromium atoms and iron atoms. In a case where an atomic ratio of the chromium atoms to the iron atoms is measured from the surface of the member to a position 10 nm below the surface in a depth direction, a maximum value of the atomic ratio is found in a region extending 3 nm from the surface of the member in the depth direction. The maximum value is 0.5 to 3.0, and an average surface roughness of the surface of the member is equal to or lower than 10 nm.

This invention discloses a method for preparing a La-containing high-entropy alloy based on lattice distortion and multiphase synergy. The atomic ratio of the La-containing high-entropy alloy is Ti:Fe:Ni:Cr:La = 22.5:22.5:22.5:22.5:10, and it simultaneously contains LaNi phase, TiFe2 phase, Cr solid solution phase, and Ni solid solution phase. The preparation method involves: arc melting Ti, Fe, Ni, Cr, and La, followed by grinding, crushing, milling, and sieving to obtain TFNC-La. A method for preparing a magnesium hydride hydrogen storage material based on a La-containing high-entropy alloy involves: ball milling TFNC-La and MgH2 to obtain MgH2-TFNC-La. When the obtained MgH2-TFNC-La is used in the field of hydrogen storage, the initial hydrogen release temperature drops to 186.20-190.12 ℃ and the hydrogen release amount reaches 6.66-6.68 wt.% when the catalyst doping amount is 10 wt.%; the hydrogen release amount is 6.02-6.10 wt.% when the dehydrogenation temperature is 300 ℃ and the dehydrogenation time is 7 min; and the hydrogen absorption amount is 5.03-5.07 wt.% when the hydrogen pressure is 2.5 MPa, the hydrogen absorption temperature is 175 ℃ and the hydrogen absorption time is 6 min.

Coated cutting tool (4) comprising a carbide (1) and a coating layer (3) formed on the carbide (1), wherein the coated cutting tool (4) is arranged such that the coated cutting tool (4) has a rake face, a clearance face and a cutting edge line part which is located between the rake face and the clearance face, the coating layer (3) has a composite layer (2) which contains a compound with a composition represented by the following formula 1: (Al x Ti 1-x )N Formula 1, In formula 1, x represents the atomic ratio of elemental Al relative to the total of elemental Al and elemental Ti and satisfies 0.70 ≤ x ≤ 0.90. if the average thickness of the coating layer (3) in the cutting edge line part is expressed as T1 and the average thickness of the coating layer (3) in the rake face at a position 2 mm or more away from the cutting edge line part in the direction of the rake face is expressed as T2, T1 is 4.0 µm or more and 10.0 µm or less, T2 is 2.0 µm or more and 7.0 µm or less, and T2 < T1 is satisfied, and if the residual stress of the carbide (1) in the cutting edge line part is expressed as S1 and the residual stress of the carbide (1) in the rake face at a position 2 mm or more away from the cutting edge line part in the direction of the rake face is expressed as S2, S2 < S1 is satisfied.