16 results about "Metglas" patented technology

The invention provides a metal glass re-toughening method, and relates to the technical field of amorphous alloy mechanical property improvement, and the metal glass re-toughening method comprises the following steps: carrying out current treatment on relaxation-state metal glass, heating the relaxation-state metal glass to a first set temperature, and then carrying out quenching treatment; wherein the first set temperature is lower than the glass transition temperature Tg of the metal glass. It needs to be explained that the relaxation state (aging state) metal glass is subjected to energizing treatment, so that the relaxation state (aging state) metal glass is rapidly heated to a higher temperature, at the moment, the memory effect can be activated, the free volume content in the metal glass is increased to a certain extent, and the energy state of the metal glass is improved; subsequently, rapid cooling by quenching is performed such that the increased free volume is retained, achieving rejuvenation of the metallic glass after aging.

The invention discloses aluminum-based metal glass and a treatment method thereof. The treatment method comprises the following steps: obtaining a target aluminum-based amorphous alloy bar; determining an elastic loading force according to the breaking strength of the target aluminum-based amorphous alloy bar; according to the elastic loading force, axial elastic loading treatment is conducted on the target aluminum-based amorphous alloy bar, external energy is introduced into the aluminum-based amorphous alloy bar through the axial elastic loading treatment, the energy state of the aluminum-based metal glass is improved, and therefore the young aluminum-based metal glass can be obtained. In the process, more free volume / flow units are introduced into the metallic glass, so that the metallic glass is converted to a state close to a supercooled liquid structure, and a large number of shear bands are generated in the deformation process, so that the mechanical property of the aluminum-based metallic glass is remarkably improved, the brittleness of the aluminum-based metallic glass is improved, and the comprehensive mechanical property of the aluminum-based metallic glass is improved. And the method is easy to operate, a high-performance solution is provided for the lightweight fields of ships, aerospace and the like, and unification of excellent performance and industrial application is achieved.

This invention discloses an ion beam sputtered high-entropy alloy glass electrocatalytic electrode, its preparation method, and its application. The method includes: firstly, fabricating a nickel microgrid with a three-dimensional nanocone array structure using micro-nano lithography and electrodeposition techniques; then, using the obtained nickel microgrid as a substrate, sputtering and depositing FeCoNiCrMn high-entropy metallic glass on its surface via ion beam sputtering to obtain the catalytic electrode. The preparation method of this invention enhances the uniformity of the high-entropy metallic glass distribution and its adhesion to the substrate; therefore, this integrated catalytic electrode can be directly used as a working electrode. Simultaneously, the preparation method is highly controllable and reproducible, suitable for industrial production. The catalytic electrode prepared by this invention is mainly applied to the water electrolysis reaction in alkaline electrolytes, exhibiting excellent catalytic performance. Its multi-component synergistic effect and high-entropy effect give it high intrinsic catalytic activity and stability. Furthermore, the amorphous structure exposes abundant active sites.

The present invention belongs to the field of metallic glass and provides a method for regulating the performance and thermal stability of CuZrAl metallic glass by melt phase transition, comprising: taking each metal element according to the composition ratio of CuZrAl metallic glass, placing it in an induction melting chamber, ‑5 Pa~10 ‑4 Pa, and repeatedly smelting for 5 to 10 times under the protection of an inert atmosphere to obtain a CuZrAl alloy; ‑6 Pa~10 ‑5 Pa, inert atmosphere protection, heated to a temperature above the melting point, quenching temperature T q Cu is heated to 1473K~1573K 46 Zr 46 The Al8 melt was cooled at a rate of 10 4 K / s freezes into a metallic glass solid, which is obtained. LLST will cause more and more dispersed icosahedral atomic clusters in its structure, thereby improving the glass forming ability and thermal stability; before and after the occurrence of LLST in high-temperature melts, the structural origin that determines the mechanical properties changes, resulting in the hardness and elastic modulus of metallic glass changing with the quenching temperature T q The decrease shows a two-stage change with the LLST occurrence temperature as the turning point, first decreasing and then increasing.

A power tool includes a drive mechanism, a housing enclosing at least a portion of the drive mechanism, a spindle rotatable in response to receiving torque from the drive mechanism, a first drive element coupled for co-rotation with the spindle, the first drive element including a first sliding contact surface, and a second drive element rotationally fixed to the housing, the second drive element including a second sliding contact surface engageable with the first sliding contact surface while the spindle rotates. At least one of the first drive element or the second drive element includes an amorphous metal material.

A method to grow metallic glass films utilizes engineering steep, spatially modulated compositional gradients during physical vapor deposition. This method can be used to enhance the thermal stability (increase glass transition and crystallization temperature) of thin film metallic glasses or can be used to produce amorphous films of metallic alloys that do not readily form a glassy structure.

The invention discloses an ultrasonic amplitude-change pole based on a Metglas composite pasting layer and a simulation method of the ultrasonic amplitude-change pole, and belongs to the technical field of mechanical antennae. The ultrasonic amplitude-change pole comprises an amplitude-change pole body and a Metglas amorphous alloy strip layer; the amplitude-change pole body can amplify and transmit ultrasonic mechanical vibration and is a main carrier of vibration energy; the Metglas amorphous alloy strip layer is adhered to the characteristic area of the surface of the amplitude-change pole body, the stress propagation path is changed by utilizing the mechanical property of the Metglas amorphous alloy strip layer, sharp point stress is dispersed into gentle area stress, and loss of vibration energy on the surface of the amplitude-change pole is reduced. According to the amplitude-change pole, the Metglas amorphous alloy strip layer is attached to the stress concentration area, the multi-physical-field coupling simulation and parameterization optimization method is combined, stress concentration is remarkably reduced, the fatigue life is doubled, and the problems that traditional design is low in precision, long in period and single in performance are solved.

The invention is related to nickel-based metallic glass alloys that can be produced in an amorphous structure, that contain metals with a high melting point and a high boron content, and that, when subjected to heat treatments above their crystallization temperatures, both a phase with high fracture toughness (nickel solid solution) and borides with high hardness values can be precipitated.

The application provides a method for re-toughening metal glass, and relates to the technical field of mechanical property improvement of amorphous alloy, and comprises the following steps: performing current treatment on the relaxed state metal glass, heating the relaxed state metal glass to a first set temperature, and then performing quenching treatment; wherein the first set temperature is lower than the glass transition temperature Tg of the metal glass. It should be noted that the current treatment is performed on the relaxed state (aged state) metal glass to rapidly heat the metal glass to a higher temperature, at this time, the memory effect can be activated, the free volume content in the metal glass is increased to a certain extent, the energy state of the metal glass is improved, and then the increased free volume is retained through rapid cooling by quenching, so that the aging of the metal glass is realized.

The invention belongs to the technical field of sensors, and particularly relates to a broadband response low-noise magnetoelectric sensor working in a room temperature environment, which comprises a magnetoelectric sensing unit, a pre-amplifier and a frequency-selecting amplifying circuit, and is characterized in that the output of the magnetoelectric sensing unit is connected with the input end of the pre-amplifier; the output end of the preamplifier is connected with the frequency-selecting amplifying circuit, and the other end of the magnetoelectric sensing unit is grounded; the magnetoelectric sensing unit comprises a piezoelectric layer, and the piezoelectric layer is formed by arranging five PZT piezoelectric fibers in parallel; two interdigital electrodes with the electrode distance of 850 microns are taken as a group and are respectively adhered to the upper side and the lower side of the piezoelectric layer through epoxy resin; and four Metglas amorphous strips are respectively adhered to the upper surface and the lower surface of each interdigital electrode through epoxy resin. The problem that the-3dB bandwidth of the magnetoelectric sensor is too narrow is solved.

Fuel cell alloy bipolar plates. The alloys may be used as a coating or bulk material. The alloys and metallic glasses may be particularly suitable for proton-exchange membrane fuel cells because of they may exhibit reduced weights and / or better corrosion resistance. The alloys may include any of the following AlxCuyTiz, AlxFeyNiz, AlxMnyNiz, AlxNiyTiz, CuxFeyTiz, CuxNiyTiz, AlxFeySiz, AlxMnySiz, AlxNiySiz, NixSiyTiz, and CxFeySiz. The alloys or metallic glass may be doped with various dopants to improve glass forming ability, mechanical strength, ductility, electrical or thermal conductivities, hydrophobicity, and / or corrosion resistance.

The invention discloses a magnetoelectric resonator based on a tuning fork structure, which comprises a PZT-5 integrated tuning fork base body, a Metglas magnetostrictive film and an electrode unit, and is characterized in that the tuning fork base body is integrally formed by a rectangular rigid base part and two parallel symmetrical vibrating arms; the magnetostrictive film only covers an effective vibration section of the vibration arm and avoids an arm root stress concentration area, a bubble-free and gapless interface is formed by vacuum hot-pressing lamination, the lower surface of the vibration arm is provided with a fully-covered lower electrode, the upper surface of the vibration arm is provided with strip-shaped upper electrodes on two sides of the film and is not overlapped with the film, and a lead is led out from a base part. According to the invention, the two vibrating arms can generate reverse same-frequency bending resonance, magnetic-mechanical-electric and electric-mechanical-magnetic reversible conversion is realized, and the coupling efficiency and the anti-interference stability are improved.

The application provides a layered nanometer metal glass film with high hardness and high deformation capacity and a preparation method thereof. The method is used for preparing a metal glass film with a high-density nanometer amorphous / amorphous layered interface by co-sputtering. The unique microstructure of the film is that the component layer is an amorphous CuTa alloy with the same element but different content, and the thickness of the amorphous component layer is controlled to be in a very small scale. The application fully utilizes the excellent amorphous forming capacity of the binary Cu-Ta alloy, and can form a nanometer amorphous / amorphous interface by using two metal elements, thereby greatly reducing the consumption of alloy elements, avoiding the complex preparation process of alloy target material or the customization of expensive alloy target material, and greatly reducing the preparation cost of the material. The metal glass film has excellent mechanical properties of high hardness and high deformation capacity (no shear band under micro-scale indentation), and has wide application prospects in the fields of high-strength electronic devices, wear-resistant and corrosion-resistant coatings and the like.

An embodiment relates to an ultrasonic additive manufacturing process, comprising joining a foil comprising a bulk metallic glass to a substrate; and forming a cladded composite comprising the foil and the substrate; wherein a thickness of the cladded composite is greater than a critical casting thickness of the bulk metallic glass, wherein the cladded composite comprises a cladding layer of the bulk metallic glass on the substrate and the bulk metallic glass comprises approximately 0% crystallinity, approximately 0% porosity, less than 50 MPa thermal stress, approximately 0% distortion, approximately 0 inch heat affected zone, approximately 0% dilution, and a strength of about 2,000-3,500 MPa.

The invention discloses a method for realizing rejuvenation of an as-cast amorphous alloy or an aging amorphous alloy through low-temperature thermal cycle treatment, and relates to the technical field of amorphous alloy materials. According to the method, as-cast amorphous alloy or aging amorphous alloy is soaked in boiling water for 2 min + / -4 s after being soaked in liquid nitrogen for 2 min + / -4 s to serve as a low-temperature heat cycle period; and the low-temperature thermal cycle period is repeated, and rejuvenation of the as-cast amorphous alloy or the aging amorphous alloy is achieved. According to the method, liquid nitrogen-boiling water low-temperature thermal cycle treatment is conducted, rejuvenation of the amorphous alloy in the cast state and the aging state can be rapidly achieved in batches, complex equipment is not needed, operation is easy and convenient, and the cost is controllable. After being treated by the method, the average hardness of the as-cast amorphous alloy and the aging amorphous alloy is reduced, the compressive strength is reasonably regulated and controlled, the plasticity is remarkably improved, the plasticity improvement effect of the as-cast alloy is better, the core limitation of room-temperature macroscopic brittleness of metallic glass is broken through, and the practical application scene of the metallic glass in the fields of machinery, electronics and the like is widened.

The invention discloses a high-strength and high-toughness pearlite steel wire with a surface-induced multi-scale gradient heterogeneous structure as well as a preparation method and application of the high-strength and high-toughness pearlite steel wire, and belongs to the technical field of pearlite material processing. The invention discloses a high-strength and high-toughness pearlite steel wire with a surface-induced multi-scale gradient heterogeneous structure. The pearlite steel wire has a granular-fibrous-multi-layer rock gradient structure from the edge part to the core part; and the surface of the steel wire is provided with a metal glass-nanocrystalline composite coating which is metallurgically bonded with a matrix and has the thickness of 3-8 microns. The matrix strength is improved through solid solution strengthening; the amorphous / nanocrystalline structure plays a key role in relieving stress concentration and promoting coordinated deformation; and the dispersively distributed particles and fibrous sheet layers further provide the work hardening capability. The Vickers hardness of the aluminum alloy reaches up to 500-520 HV < 0.1 >, the tensile strength of the aluminum alloy is 3060-3080 MPa, and the ductility of the aluminum alloy is 15.0-18.0%.