61 results about "Metglas" patented technology

Methods and compositions relating to powder metallurgy in which an amorphous-titanium-based metal glass alloy is compressed above its glass transition temperature Tg with a titanium alloy powder which is a solid at the compression temperature, to produce a compact with a relative density of at least 98%.

Disclosed in this invention is a family of ternary and multi-nary iron-based new compositions of bulk metallic glasses which possess promising soft magnetic properties, and the composition selection rules that lead to the design of such new compositions. The embodiment alloys are represented by the formula M_aX_bZ_c, where M represents at least one of ferromagnetic elements such as iron and may partly be replaced by some other substitute elements; X is an element or combinations of elements selected from those with atomic radius at least 130% that of iron and in the mean time is able to form an M-rich eutectic; and Z is an element or combinations of elements selected from semi-metallic or non-metallic elements with atomic radius smaller than 86% that of iron and in the meantime is able to form an M-Z eutectic; a, b, c are the atomic percentage of M, X, Z, respectively, and a+b+c=100%. When 1%<b<15% and 10%<c<39%, the alloys show a bulk glass forming ability to cast amorphous ribbons/sheets at least 0.1 mm in thickness. When 3%<b<10% and 18%<c<30%, the alloys show a bulk glass forming ability to cast amorphous rods at least 1 mm in diameter. The amorphous phase of these as-cast sheets/rods is at least 95% by volume. This invention also discloses the existence of nano-crystalline phase outside of the outer regime of the bulk glass forming region mentioned above.

A high-frequency core is a molded body obtained by molding a mixture of a soft magnetic metallic glass powder and a binder in an amount of 10% or less in mass ratio. The powder has an alloy composition represented by a general formula (Fe_1-a-bNi_aCo_b)_100-x-y-z(M_1-pM′_p)_xT_yB_z (where 0≦a≦0.30, 0≦b≦0.50,0≦a+b≦0.50,0≦p≦0.5, 1 atomic %≦x≦5 atomic %, 1 atomic %≦y≦12 atomic %, 12 atomic %≦z≦25 atomic %, 22≦(x+y+z)≦32, M being at least one selected from Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, and W, M′ being at least one selected from Zn, Sn, R (R being at least one element selected from rare earth metals including Y), T being at least one selected from Al, Si, C, and P). An inductance component includes the high-frequency core and at least one turn of winding wound around the core.

A forging apparatus and method of uniformly heating, rheologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool are provided. The RCDF method utilizes the discharge of electrical energy stored in a capacitor to uniformly and rapidly heat a sample or charge of metallic glass alloy to a predetermined “process temperature” between the glass transition temperature of the amorphous material and the equilibrium melting point of the alloy in a time scale of several milliseconds or less. Once the sample is uniformly heated such that the entire sample block has a sufficiently low process viscosity it may be shaped into high quality amorphous bulk articles via forging in a time frame of less than 1 second.

An objective of the present invention is to form a hyper-elastic flange integrally within a shield case body around a periphery thereof while decreasing an occupied area for grounding. The shield case 2 according to the present invention is disposed to cover electronic parts 6 on a circuit board 1, and which has a flange 7 formed integrally therewith so as to contact with a metallic ground line 3 on the circuit board 1. The flange 7 is elastically deformed to be grounded, thus a leakage of electromagnetic waves to the outside of the shield case 2 is prevented. The flange 7 is made of metallic glass. By forming the flange 7 from metallic glass, a displacement due to viscous flowing on the atomic level, which is different from a plastic deformation, can be utilized, and thus a high precision flange can be formed without a spring-back.

The invention relates to a cobalt-based bulk amorphous alloy and a preparation method thereof. The alloy comprises the following components by atomic percentage: 33 to 55 percent of Co, 13 to 34 percent of Fe, 18 to 26 percent of B, 2 to 7 percent of Si, and 3 to 8 percent of Nb. Cobalt-based bulk metallic glass is proportioned according to the atomic mol ratio as required by the components, then the glass is forged for a plurality of times in a vacuum arc furnace, and the bulk amorphous alloy is prepared by casting in a vacuum copper mold. The bulk amorphous alloy has strong amorphous forming ability and excellent soft magnetic property, the size of the prepared amorphous material is not less than 3 millimeters at each dimensionality, the maximum size can reach 5 millimeters, the coercive force is between 1.17 and 2.35 A/m, and the maximum effective magnetic conductivity can reach 36,000 (1KHz 1A/m). The cobalt-based bulk amorphous alloy can be applied to magnetic devices in the fields of information, communication and the like.

The invention belongs to the field of preparing a soft magnetic alloy in functional materials, in particular relates to a novel iron-based nanocrystalline soft magnetic alloy material with excellent comprehensive performance, such as low cost, high saturation magnetic induction intensity, low loss, and the like. The novel iron-based nanocrystalline soft magnetic alloy material comprises the following chemical constituents by atomic percentage: 6-9 Si, 4-7 B, 3-6 P, 0.5-1.5 Cu, 0.05-0.15 Nb and the balance of Fe. Compared with traditional iron-based amorphous or nanocrystalline soft magnetic alloys, such as Metglas, Finemet, Nanoperm and the like, the iron-based nanocrystalline soft magnetic alloy greatly decreases the consumption of the noble element Nb, has the advantages of simple constituent design, low cost and excellent comprehensive performance of the materials by substituting low-price P for noble B, can substitute the prior silicon-steel sheets and iron-based amorphous or nanocrystalline soft magnetic alloys and can be widely applied to the fields, such as power transformers, mutual inductors, and the like.

A high-frequency magnetic core, which is a molded body obtained by molding a mixture of soft magnetic metallic glass powder and a binder in a mass ratio of 10% or less. The powder has an alloy composition represented by the following general formula: (Fe1-a-bNiaCob)100-x-y-z(M1-pM'p)xTyBz (wherein 0≤a≤0.30, 0≤b≤0.50, 0 ≤a+b≤0.50, 0≤p≤0.5, 1at%≤x≤5at%, 1at%≤y≤12at%, 12at%≤z≤25at%, 22≤(x+y+ z)≤32, M is at least one selected from Zr, Nb, Ta, Hf, Mo, Ti, V, Cr, and W, M' is selected from Zn, Sn and R (wherein R is selected from including Y is at least one of at least one element in rare earth metals), and T is at least one selected from Al, Si, C and P). An inductive element includes a high-frequency magnetic core and at least one coil wound around the high-frequency magnetic core.

A bulk-glass forming Ni—Cr—Nb—P—B alloy is provided. The alloy includes Ni_{(100−a−b−c−d)}Cr_aTa_bP_cB_d, where the atomic percent a is between 3 and 11, the atomic percent b is between 1.75 and 4, the atomic percent c is between 14 and 17.5, and the atomic percent d is between 2.5 and 5. The alloy is capable of forming a metallic glass having a lateral dimension of at least 3 mm.

The invention relates to an amorphous composite structure steel which comprises the following components in percentage by weight: 0.02-0.2% of C, 13-16% of Mn, 3-5% of Si, 10-12% of Cr, 0-2% of Re and the balance of Fe. The structure of the composite material is a gamma austenite phase+amorphous composite structure, and can generate gamma austenite-martensite phase transformation under the induction of stress to strengthen and toughen the metallic glass. The composite material has low yield-tensile ratio, can generate plastic deformation, and can reach high strength through the excellent work hardening capacity.

Disclosed herein is a flexible substrate, made of metallic glass that is of high resilience suitable for use in electronic devices. The metallic glass is composed of a commercial alloy that can be produced in a continuous process on a mass scale, and may be selected from among Mg-, Ca-, Al-, Ti-, Zr-, Hf-, Fe-, Co-, Ni-, and Cu-based metallic glass. Preferably, its crystallization temperature, which determines the process allowable temperature, is 200° C. or higher. The flexible metallic glass substrate exhibits excellent fatigue properties as well as resilience of 1.5 MJ/m³ or higher. Its coefficient of thermal expansion is within a small range of 1 to 20 ppm/° C., so that the flexible metallic glass substrate shows a better interfacial property with electronic devices.

The invention discloses a high magnetostrictive Fe-based metal glass magnetic material and a preparation method thereof. The chemical formula of the high magnetostrictive Fe-based metal glass alloy is Fe100-x-y-zMozByTbx, wherein, x, y and z are respectively the atomic percents of Tb, B and Mo, 100-x-y-z is the atomic percent of Fe, x is more than 0 and less than or equal to 10, y is more than or equal to 20 and less than or equal to 25, z is more than 0 and less than or equal to 10. The preparation method of the alloy is as follows: the industrial pure metals Fe, Mo, Tb and FeB alloy are proportioned according to the alloy formula and melted repeatedly by induction-arc under the protection of argon to make master alloy, then the high magnetostrictive Fe-based metal glass magnetic material is obtained through casting by using the copper mold spray-casting method. The magnetostrictive coefficient of the magnetic material is 420 ppm to 985 ppm, and the magnetic material has simple components, high thermal stability, and good mechanical properties and amorphous forming ability. The high magnetostrictive Fe-based metal glass magnetic material can be widely applied to the fields of sonar transducer, sensor, ultrasonic technology, communication technology, and the like.

The invention discloses a zirconium-based metal glass endogenic composite material and a preparation method thereof. According to the invention, an atomic percent expression of components of the zirconium-based metal composite material is ZraTibCucNidBee, wherein a is not less than 44 and not more than 49, b is not less than 14 and not more than 16, c is not less than 13 and not more than 17, d is not less than 11 and not more than 13, e is not less than 5 and not more than 18, and a+b+c+d+e=100. A method for preparing the zirconium-based metal glass endogenic composite material comprises the following steps of: selecting a block metal glass alloy system, and adjusting alloy components according to a phase selection principle so as to separate out an intermetallic compound phase in a condensation process; smelting the alloy components obtained in the first step to a mother alloy according to an electric arc smelting method; remelting the mother alloy, and carrying out suction cast through a copper mold so as to obtain a section bar; placing the section bar into a processed crucible, adopting induction smelting to a molten state, thermally insulating and quickly condensing in sequence so as to an as-cast endogenic composite material, wherein a second phase of the intermetallic compound is uniformly distributed on a metal glass substrate. According to the invention, the high intensity and the high hardness of the block metal glass are kept, and the room-temperature plasticity is greatly improved.

A challenge of the present invention is to develop a method for repeatedly forming a reverse transferred pattern in a simple and efficient manner onto the surfaces of Zr based, Ti based, Cu based, Ni based and Fe based metallic glass that have supercooled liquid temperatures of not lower than 400° C. and are also required to be molded at not lower than 400° C. (a) An image pattern is converted into bitmap data being mirror reversed with respect to a real image, (b) high energy density light 15 is repeatedly flashed, and the surface of a mold 20 is scanned while one of dot holes 24 is formed by one-time irradiation, to form an image pattern as dots assembled pattern 21 onto the surface of the mold 20 in accordance with the bitmap data, and (c) the dots assembled pattern 21 is reverse-transfer molded onto a metallic glass 1 within a supercooled liquid temperature range Tg-Tx by means of the mold 20 which is for dots assembled pattern formation.

A class of alloys is provided that form metallic glass upon cooling below the glass transition temperature Tg at a rate below 100° K/sec. The alloys have a high value of temperature difference (DT) between the crystallization temperature (Tx) and the glass transition temperature (Tg) of the intermetallic alloy. Such alloys comprise zirconium in the range of 70 to 80 weight percent, beryllium in the range of 0.8 to 5 weight percent, copper in the range of 1 to 15 weight percent, nickel in the range of 1 to 15 weight percent, aluminum in the range of 1 to 5 weight percent and niobium in the range of 0.5 to 3 weight percent, or narrower ranges depending on other alloying elements and the critical cooling rate and value of DT desired. Furthermore, methods are provided for making such metallic glasses.

The invention belongs to the field of biosensors, in particular to a method for improving the sensitivity of a magnetostrictive material biosensor. In the invention, a Fe40Ni38Mo4B18(Metglas 2826MB) amorphous film alloy strip magnetostrictive material is selected and cut into a diaphragms, the dimension range of which is (2-25)mm*(04-5mm)*15mum; in the adopted heat treatment process, the heating temperature is 150-300 DEG C, the heating time is 2-4 hours and the vacuum is 10-3 torr. By using the technology of reducing the dimensions of the magnetostrictive material biosensor and carrying out certain process of vacuum annealing heat treatment, the goals of reducing the dead weight of the magnetostrictive material biosensor, removing the internal residual stress and regulating the microstructure are achieved and the target of improving the sensitivity of the magnetostrictive material biosensor is achieved.

A method for improving room-temperature plasticity of amorphous alloy belongs to the field of material technology research and particularly relates to a method for improving the amorphous plasticity by plating a metallic nickel layer on the surface of an amorphous body aiming to the characteristics that the amorphous body is high in strength, but low in plasticity. The method is characterized in that an electroplating method is adopted to improve the plasticity of formed block metallic glass structural members and comprises the following basic steps: first, preparing required real amorphous test samples by a high-vacuum non-self-consuming arc-melting furnace; second, performing preplating processing on the samples; third, plating a crystal metal layer on the surface of each amorphous sample through an electroplating way. The amorphous composite manufactured by the method is greatly improved in plasticity, and the amorphous body still maintains original glass state structure.

The invention discloses blocky high-entropy metallic glass. The blocky high-entropy metallic glass comprises, by atomic percent, 23-31% of copper, 22-32% of zirconium, 9-31% of titanium, 14-31% of nickel, 5-18% of aluminum and less than 0.5% of impurities. The blocky high-entropy metallic glass has high strength, high plasticity and high amorphous material-forming ability. The invention also discloses a preparation method of the blocky high-entropy metallic glass. The preparation method has simple processes. Through the preparation method, high-entropy metallic glass rods of which the diameters greater than or equal to 1.5mm are obtained.

A method and resulting gas turbine engine component (40) having a protective layer of metallic glass (14) deposited over a superalloy substrate (12). A further layer of ceramic insulating material (42) may be deposited over the metallic glass. The metallic glass functions as a bond coat to provide thermal insulation and mechanical compliance. The metallic glass may be deposited onto the substrate by a flux mediated laser deposition process wherein powdered alloy material (18) is melted together with powdered flux material (20). The flux material can facilitate the glass forming process by adding to the solidification confusion effect and/or by providing an active cooling effect.

A conductive paste including a conductive powder, a metallic glass, and an organic vehicle, wherein the metallic glass includes an alloy of at least two elements selected from an element having a low resistivity, an element which forms a solid solution with the conductive powder, or an element having a high oxidation potential, wherein the element having a low resistivity has a resistivity of less than about 100 microohm-centimeters, and the element having a high oxidation potential has an absolute value of a Gibbs free energy of oxide formation of about 100 kiloJoules per mole or greater.