291results about How to "Enhanced Amorphous Formation Ability" patented technology

The invention relates to braze welding Si3N4 ceramics containing the boron Ti-based amorphous solder and the preparation method thereof, and belongs to the brazing material in the field of amorphous state and metallurgy. The ingredients of the brazing material consist of the following according to the mass percent: Zr of 12.0-28.0 percent, Ni of 12.0-28.0 percent, Cu of 12.0-28.0 percent, and B of 0.05-0.5 percent, and the remains is Ti. The melting scope of the brazing material ranges 1,150K to 1,250K, and the brazing temperature is from 1,273K to 1,373K. The Ti-Zr-Ni-Cu-B amorphous braze vacuum braze welding Si3N4 ceramics, which is produced by the rapid solidification technology, has superior high-temperature performance to Ag-Cu-Ti solder and Ti-Zr-Ni-Cu solder. The tie-in high-temperature bend strength reaches 145MPa under 673K DEG,108MPa under 773K DEG, and still 93MPa under 873K DEG.

The invention relates to a preparation technology of a block zirconium-base amorphous alloy, in particular to a Zr-Cu-Ni-Al-Ag alloy with higher glass-forming ability and a preparation method thereof, and the characteristic thermodynamics parameter and the mechanical property of the alloy are characterized and tested at the same time. The alloy system is the Zr-Cu-Ni-Al-Ag alloy, which has the component ranges (by atom percentage) that Zr is 41 to 63, Cu is 18 to 46, Al is 4 to 15, Ni is 1.5 to 12.5, and Ag is 1.5 to 26. Based on a Zr-Cu-Ni-Al quaternary alloy, the forming ability of the amorphous alloy is increased through inhibiting the precipitation of a crystalline state phase. The preparation technology adopts an electric arc melting method to prepare a master alloy ingot, then adopts a copper mold casting method to prepare amorphous alloy rods with different diameters, and the alloy in the system can easily prepare amorphous round bars, the diameter of which can reach 2cm. Due to stronger amorphous forming ability and good mechanical property, the alloy has good application prospect.

The invention relates to a preparation method for a zirconium-based amorphous alloy as well as powder and a large-sized block of the zirconium-based amorphous alloy, which belongs to the field of amorphous alloys, and is characterized by comprising the component of Zr61(Cu, Ni)27.5Al10Re1.5(at%), wherein Re is Y, La, Ce, Nd, Gd and Er, and adopting a manner of combination of the gas atomization powder milling technology and the spark plasma sintering technology. The preparation method comprises the following steps: preparing raw materials according to components of the amorphous alloy, and placing the raw materials into an induction crucible of gas atomization powder milling equipment; vacuumizing and filling inert gas for shielding; smelting to obtain an alloy solution with uniform components under the action of induction heating; pouring the alloy solution after smelting into an insulation bag at a constant speed slowly, and filling high-pressure inert gas as an atomizing medium at the same time; atomizing the alloy solution flow into small droplets under the impact of high-pressure airflow, and finally cooling to form amorphous alloy powder; collecting and screening the amorphous alloy powder; and under the protection of the inert gas, utilizing the spark plasma sintering technology to perform sintering on the amorphous alloy powder at different temperatures and pressure to obtain an amorphous alloy block.

The invention discloses braze welding Si3N4 porcelain Ti base high temperature non-crystalline brazing filler metal and the preparing method thereof, in particular to Ti-Zr-Ni-Cu high temperature active non-crystalline brazing filler metal and the preparing method thereof, and pertains to the braze welding material of non-crystalline state and metallurgy field. The brazing filler metal has the ingredients and the contents (matching according to the quality percentage) as follows: Ti of 30.0 to 45.0 percent, Zr of 22.0 to 26.0 percent, Ni of 12.0 to 16.0 percent, and Cu of 15.0 to 30.0 percent. The melting temperature range of the brazing filler metal is 1100 to 1170 K; the braze welding temperature is 1223 to 1323 K. Compared with the brazing filler metal prepared by normal melting technique with the same component, the Ti-Zr-Ni-Cu high temperature active non-crystalline brazing filler metal leaf obtained by the rapid solidifying technique has favorable wetting property and tie-in dynam performance; adopting the non-crystalline brazing filler metal to vacuum braze weld Si3N4 porcelain, the tie-in chamber temperature bending intensity is 160 MPa; when the temperature is 673 K, the tie-in high temperature bending intensity is 126 MPa; when the temperature is 773 K, the high temperature bending intensity is 83 MPa.

A zirconium-based amorphous alloy and a preparation method therefor. The composition of the amorphous alloy is ZraCubAlcMd(Er1-xYx)e, wherein M is at least one selected from Ni, Fe, Co, Mn, Cr, Ti, Hf and Ta, 40≤a≤70, 15≤b≤35, 5≤c≤15, 3≤d≤15, 0.2＜e≤2.5, and 0＜x＜0.5, and the amorphous alloy is obtained by smelting and cooling molding under the protection of an inert gas or a vacuum condition.

The invention relates to a zirconium-based amorphous alloy. The zirconium-based amorphous alloy comprises zirconium, copper, nickel, aluminum and sliver; and the zirconium-based amorphous alloy is shown by the following formula: Zr70-xCu12.5Ni10Al7.5Agx, wherein x is more than or equal to 1 and less than or equal to 10. The preparation method comprises the steps of replacing zirconium element by a silver part, and melting by arc under vacuum, and then carrying out suction casting, so as to obtain the zirconium-based amorphous alloy. The zirconium-based amorphous alloy is excellent in plastic deformation capacity and high in strength; the amorphous alloy is high in glass transition temperature and initial crystallizing temperature, and wide in sub-cooled liquid phase area, and has a potential application prospect.

The invention relates to a technique for enhancing amorphous forming ability of an alloy melt. The technique is characterized by comprising the following steps: 1. measuring the viscous characteristic of an superheating circulation treatment alloy melt; 2. establishing the relation between the superheating circulation treatment temperature and alloy melt viscous characteristic of the Fe-Si-B alloy melt; 3. selecting the Fe-Si-B alloy melt superheating treatment temperature, and carrying out heat treatment; and 4. cooling the Fe-Si-B alloy melt subjected to superheating treatment to the set melt temperature, and quickly setting to obtain the solid amorphous alloy. The technique can enhance morphous forming ability of lloy melt and lower morphous solid alloy preparation difficulty by utilizing the viscous characteristic of the superheating treatment on the premise of not changing lloy composition and quick setting technological conditions. The technique has dvantages of low implementation cost, high efficiency, high controllability, high repetitiveness, high technical reliability and the like, and can be widely used in the technical field of metal functional material preparation.

The invention relates to a method adopting laser cladding to form an amorphous alloy coating on the surface of carbon steel, and as the laser cladding method is adopted on a laser welder, the carbon steel plate is intensified. The technical scheme comprises the following steps: sand blasting the surface of the carbon steel; preparing mixed powder of zirconium, nickel, aluminum and copper; cladding the surface of the carbon steel by utilizing a laser beam, and enabling the laser beam to perform all-directional irradiation along a locus curve set by a computer program; forming the amorphous alloy coating after amorphous alloy powder is fused and cured on the surface of the carbon steel. By the adoption of the method, the surface hardness, abrasion resistance and corrosion resistance of the carbon steel are greatly improved; compared with the performances before treatment, the surface hardness of the carbon steel is increased by four times, the abrasion resistance is increased by four times, and the corrosion resistance is increased by 1000%; the intensifying method has the advantages of advanced process, detailed and accurate data, short technological process and simplicity in realization, and is safe, stable and reliable; the cladding coating is solid and not easy to drop off; the method is ideal in intensifying the surface of the carbon steel.

The invention provides a cobalt-base block amorphous soft magnetic alloy with high amorphous forming ability and a preparation method thereof. The molecular formula of the amorphous soft magnetic alloy is CoaFebNicBdSieNb5, in which a, b, c, d and e are atomic percents, wherein a is larger than or equal to 25 and smaller than or equal to 60, b is larger than or equal to 10 and smaller than or equal to 28, c is larger than or equal to 2 and smaller than or equal to 10, d is larger than 0, e is larger than 0, d+e is larger than or equal to 14 and smaller than or equal to 39, and a+b+c+d+e+5 is equal to 100. Compared with the prior art, the alloy material has the advantages of high amorphous forming ability, excellent soft magnetic property and mechanical property, the reduced glass transition temperature of the alloy material reaches 0.5-0.7, the coercive force of the alloy material reaches below 1.5A/m, the rupture strength of the alloy material is larger than 4200MPa, and the alloy material can be prepared into amorphous bars with the diameters of 1mm-7mm due to the high amorphous forming ability; therefore, the alloy material can be widely applied in the fields of transformers, magnetic sensors and the like, and has good application prospect.

The invention relates to the field of Ti-based amorphous alloys, in particular to a Ti-Zr-Cu-Ni(Fe)-Be alloy with extremely high glass forming capacity and a preparation method. The alloy system is Ti-Zr-Cu-Ni(Fe)-Be alloy, of which the composition range varies according to the following principle (atomic percent): the proportion mode is [TiaZrb(NixFe1-x)cBed]100-yCuy, wherein a is equal to 31-40percent; b is equal to 23-38 percent, c is equal to 0-9 percent, d is equal to 20-35 percent, x is equal to 0-1 and y is equal to 0-20. In the invention, initial alloy which can be used for developing amorphous alloy with high glass forming capacity is discovered by systematically analyzing a Ti-Zr-Cu-Ni(Fe)-Be alloy solidification structure, and has a typical solidification structure characteristic, namely the initial alloy mainly consists of an amorphous structure and a primary crystalline state structure; and a plurality of types of titanium-based amorphous alloys with extremely high glassforming capacity are successfully obtained by further optimizing the amorphous phase composition in the alloy. The titanium-based amorphous alloy with maximum size of at least more than phi 50mm is obtained by using a water quenching technology. The alloy shows superior mechanical property and has great application prospect.

The invention discloses a ferrum-based amorphous soft magnetic material. The ferrum-based amorphous soft magnetic material is FeaYbSicBd, wherein a, b, c and d are atomic percentage contents of corresponding components respectively; the sum of a, b, c and d is 100; and a is more than or equal to 72, but less than or equal to 78, b is more than or equal to 1, but less than or equal to 5, c is more than or equal to 8, but less than or equal to 10, and d is more than or equal to 11, but less than or equal to 14. The invention further discloses a preparation method of the ferrum-based amorphous soft magnetic material. Compared with amorphous alloy of the conventional Fe-Si-B ternary system, the ferrum-based amorphous soft magnetic material is prepared by adding a rare earth element Y on the basis of Fe-Si-B. The ferrum-based amorphous soft magnetic material has the advantages as follows: the amorphous alloy of the FeaYbSicBd system has a relatively high amorphous formation ability, excellent saturation magnetic induction intensity, low coercivity and high initial permeability, has the maximum supercooled liquid region width of 65K and the maximum saturation magnetic induction intensity of 1.67T, and is an ideal material for an iron core of a novel distribution transformer and other electronic and electrical components.

The invention discloses a high-iron content Fe-Si-B-P-Cu-Nb series amorphous and nanocrystalline alloy and a preparation method. A chemical composition expression of the alloy is FeaSibBcPdCueNbf, where a, b, c, d, e and f correspondingly represent the atomic percentages of various corresponding components of Fe, Si, B, P, Cu and Nb, and the following conditions: 85.5<=a<=86.5, 1<=b<=2, 8<=c<=9.8,2.6<=d<=4, 0<=e<=1, 0<=f<=0.55, and a+b+c+d+e+f=100 are achieved. The alloy is low in cost, a quenched state nanocrystallization soft magnetic thin band and a quenched state amorphous soft magnetic thin band can be prepared through an existing single-roller rotating quenching technology; due to adding of a little amount of the Cu and Nb elements, the amorphous forming capacity, the toughness andthe saturation magnetization strength of the alloy are improved, and the grain size of nanocrystalline is refined. The saturation magnetization strength of the quenched state nanocrystalline thin bandin the alloy reaches 1.82 T. After crystallization annealing of the amorphous thin band, the saturation magnetization strength of the nanocrystalline thin band reaches 1.84 T. The prepared amorphousand nanocrystalline alloy serves as a motor, a mutual inductor and other devices to be applicable to the fields of electric power industry transformer iron cores, inverter welding machines, new energy, wireless charging, digital, automation and the like.

The invention discloses nanometer TiF3 catalyzed high-volume hydrogen-storing alloy and a preparation method thereof. The compositions of the alloy are shown as the following: La2-xRExMg17-yNiy+100 wt% Co+z wt% TiF3, wherein 0.2<x<0.5, 1<y<3, 3<z<10, RE is at least one of rare earth elements neodymium, yttrium and samarium. The preparation method comprises: in the protection of inert gas, employing induction heating for melting, injecting fused alloy into a copper mold to obtain cylinder ingots; filling a quartz tube with the ingots, performing induction heating fusion, continuously spraying liquid alloy on the surface of a rotating water-cooling copper roller by a slit nozzle at the bottom of the quartz tube to obtain rapid-quenched alloy; and mixing fragmented alloy powder and cobalt powder, performing ball milling, adding trace TiF3 catalyst and continuing to perform ball milling to obtain the alloy powder. Through composition design and structure adjusting, the thermal stability of alloy hydride is reduced and the hydrogen adsorption/desorption capacity and the dynamic performances of the alloy are improved.

The invention discloses a high saturation magnetic induction intensity iron-based amorphous soft magnetic composite material and a manufacturing method of the composite material. The atomic ratio expression of the alloy composition forming the amorphous soft magnetic composite material is Fe100-a-b-c-dREaMbPcSd, wherein 0<a<=8, 10<=b<=25, 0<c<=10, 0<d<=0.5, RE is one or a mixture selected from Y, La, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and M is one or a mixture selected from C, Si and B. The manufacturing method of the iron-based amorphous soft magnetic composite material includes the technical steps of alloy smelting, atomizing and pulverizing, insulating cladding, compression molding and heat treating. The iron-based amorphous soft magnetic composite material prepared through the method is high in saturation magnetic induction intensity and can be applied to electronic devices high in power and frequency.

The invention discloses a boracic Cu-P-based amorphous brazing filler metal and a method for preparing the same, which belong to the technical field of the brazing of amorphous brazing filler metal and copper as well as copper alloy. The amorphous brazing filler metal comprises the following components in percentage by weight: 7.2 percent of P, 14.0 percent of Ni, 5.4 percent of Sn, 0.02 to 0.04 percent of B, 0.2 percent of Si, and the balance of Cu. The amorphous brazing filler metal is prepared by adopting a rapid solidification technique, and the prepared brazing filler metal has a bright and clean surface, two smooth sides and better toughness. The melting temperature of the amorphous brazing filler metal is between 602 and 663 DEG C and the brazing temperature is between 670 and 720 DEG C. The amorphous brazing filler metal is applicable to the brazing of the copper and the copper alloy, and applicable brazing process methods comprise flame brazing, furnace brazing, gas shield brazing, salt bath brazing, and the like. By adopting the amorphous brazing filler metal to perform flame brazing of red copper, the wetting property of the brazing filler metal is obviously better than the brazing filler metal with same components prepared by a conventional melting technique, and the shear strength of a brazed joint is more than 112 MPa.

The invention discloses a strong-permanent-magnetic nano-porous Fe-Pt alloy and a preparation method thereof. The strong-permanent-magnetic nano-porous Fe-Pt alloy has the composition of FewCoxPtyPdz, is composed of an L10-FePt ordered hard magnetic phase, and has a complete doubly-connected nano-porous structure, a pore diameter of 10-50nm and a ligament thickness of 20-80nm; the coercivity, the magnetization intensity and the residual magnetism of the alloy under a 50kOe external magnetic field are 13.4-18.5kOe, 40.4-56.3 and 28.3-37.4emu/g respectively. A master alloy ingot is prepared by electric arc melting or induction melting during preparation; an alloy strip is prepared by single-roll spinning; a nano-complex-phase precursor containing hard-magnetic L10-FePt and soft-magnetic Fe2B is obtained directly or through an annealing treatment; the nano-porous Fe-Pt alloy with a single L10-FePt phase structure is obtained through an electrochemical dealloying process, thus filling up the technical gaps of a permanent-magnetic metal nano-porous material.

The invention discloses an iron-based amorphous/nanocrystalline thin band with low cost and excellent soft magnetic properties and a preparation method thereof and belongs to the field of soft magnetic alloy in functional materials. The material comprises the following components in percentage by atom: 1.05 to 3 percent of cu, 13.6 to 15 percent of Si, 9.05 to 12.5 percent of B, 0.1 to 10 percent of Al and the balance of Fe. The preparation method comprises the following steps of: mixing materials according to the alloy formula; melting by using a vacuum medium frequency induction melting furnace for multiple times to prepare master alloy; preparing the amorphous thin band in a single-roller quenching device by controlling the speed of a rotary roller; and annealing properly to obtain the final product. The product has excellent soft magnetic properties such as high saturated magnetization intensity, low coercive force and the like. Compared with the traditional iron-based nanocrystalline soft magnetic alloy Finemet, the cheap Al is used for replacing expensive Nb, thus the production cost of the iron-based amorphous/nanocrystalline thin band is greatly lowered. At the same time, the thin band is high in surface finishment, high in toughness, simple in production process and wide in application range.