156 results about "Amorphous matrix" patented technology

Disclosed are a nitride based semiconductor device, including a high-quality GaN layer formed on a silicone substrate, and a process for preparing the same. A nitride based semiconductor device in accordance with the present invention comprises a plurality of nanorods aligned and formed on the silicone substrate in the vertical direction; an amorphous matrix layer filling spaces between nanorods so as to protrude some upper portion of the nanorods; and a GaN layer formed on the matrix layer.

A magnetic alloy having a composition represented by the general formula of Fe_100-x-yCu_xB_y (atomic %), wherein x and y are numbers meeting the conditions of 0.1≦x≦3, and 10≦y≦20, or the general formula of Fe_100-x-y-zCu_xB_yX_z (atomic %), wherein X is at least one element selected from the group consisting of Si, S, C, P, Al, Ge, Ga and Be, and x, y and z are numbers meeting the conditions of 0.1≦x≦3, 10≦y≦20, 0≦z≦10, and 10<y+z≦24), the magnetic alloy having a structure containing crystal grains having an average diameter of 60 nm or less in an amorphous matrix, and a saturation magnetic flux density of 1.7 T or more.

A Ti-based bulk amorphous matrix composite including a composition represented by Formula 1, in at %:

Ti_aZr_bBe_cCu_dNi_eM_fI_g  Formula 1

• • where M is at least one of Nb and Ta, I is an impurity, and a, b, c, d, e, and f vary within the ranges 38≦a≦50, 11≦b≦18, 12≦c≦20, 6≦d≦10, 6≦e≦9, 1≦f≦20 and 0.01≦g≦0.5, with a+b+c+d+e+f+g=100.

The invention discloses a Fe-based amorphous or nanocrystalline soft magnetic alloy, aiming to favorable performance and low cost. Alloy components can be expressed as FeaSibBcCudNbeMf, wherein M is Al, Ni or P; a, b, c, d, e and f are atom percentages, and the change range is as follows: a is more than or equal to 65 and less than or equal to 85, b is more than or equal to 5 and less than or equal to 20, c is more than or equal to 5 and less than or equal to 25, d is more than or equal to 0 and less than or equal to 5, e is more than or equal to 0 and less than or equal to 5, and f is more than or equal to 0.1 and less than or equal to 10; and a+b+c+d+e+f=100. The preparation method comprises the following steps: placing raw materials of pure ferrum, pure copper, and the like into a vacuum electric arc furnace to smelt to obtain an alloy ingot; crushing, placing into a quartz test tube, and preparing an amorphous alloy ribbon by using a single-rolling ribbon throwing method; placing into a tubular annealing furnace, adjusting the temperature to 510-580 DEG C, isothermally annealing under the protection of Ar gas and getting out of the furnace to cool; and obtaining amorphous alloys with different microstructures or nanocrystalline alloys with nanometer crystal particles evenly arranged on an amorphous matrix through controlling alloy cooling speed and heat treatment temperature as well as time.

The invention relates to an ultrasonic accumulation preparation method for an amorphous/metal micro-laminated composite. The preparation method comprises the steps that laminating data of a part are extracted, amorphous/metal foil is welded onto a metal foil substrate layer by layer through the ultrasonic solidification technique, the welded amorphous/metal micro-laminated composite is cut layer by layer according to a set part contour, and finally the part composed of the amorphous/metal micro-laminated composite is obtained. By adoption of the method, manufacturing of the three-dimensional complex-shaped part composed of the amorphous/metal micro-laminated composite and manufacturing a large-size amorphous-matrix micro-laminated composite can be achieved easily. The micro-level multi-interface effect of the composite can overcome the disadvantages of poor indoor-temperature plasticity and low breaking tenacity of amorphous alloy, and low residual internal stress and good structural stability of the interior of the formed three-dimensional part can be guaranteed through the ultrasonic solidification technique.

The invention provides a laser welding method for an amorphous matrix material. The laser welding method comprises the following step of welding a weldment on a matrix material to be welded by using pulse laser under the protection of inert atmosphere, wherein the matrix material to be welded is amorphous alloy, and the weldment is amorphous alloy or stainless steel; and the welding conditions are as follows: the laser power is 1-6.5 kW, the spot diameter is 0.1-1.0 mm, the laser emitting frequency is 1-20 Hz, the gas pressure of the inert atmosphere is 0.1-1 MPa, and the gas flow of the inert atmosphere is 1-15 mL/min. The laser welding method for the amorphous matrix material, provided by the invention, not only can be used for welding among amorphous alloys, but also can be used for welding between the amorphous alloy and stainless steel. No obvious crystallization phenomenon occurs before and after welding, and the welding strength is higher.

The invention relates to a nano-porous copper-loaded shape-controlled copper-based oxide composite as well as a preparation method and application thereof. The composite comprises an amorphous matrixat a core layer, nano-porous copper layers clamped at the two sides of the amorphous matrix and a copper-based oxide layer prepared through in situ oxidation, wherein the amorphous matrix is a TixCuyZrz alloy ingredient, x, y and z are atomic percents, x is more than or equal to 45 and less than or equal to 60, y is more than or equal to 40 and less than or equal to 50, z is more than or equal to1 and less than or equal to 5, and the sum of x, y and z is equal to 100; and the thickness of each nano-porous copper layer is 1.5-4[mu]m, ligament width is 32-55nm, and aperture size is 18-42nm. Theinvention simplifies preparation technology and avoids unnecessary energy waste, and copper-based oxides are generated through in situ oxidation on the surface of nano-porous copper and are firmly combined with a substrate, so that the composite can be taken as electrode slices of a supercapacitor independently.

Optical glass constituted by an amorphous matrix and crystal grains dispersed in the amorphous matrix, wherein the amorphous matrix comprises a first oxide of at least one of silicon oxide and phosphor oxide and a second oxide of at least one of titanium oxide and zirconium oxide, and wherein the crystal grains is at least one of titanium oxide, zirconium oxide and silicon, an average grain size of the titanium oxide grain being 3 nm to 20 nm, and the average grain size of the silicon crystal being 3 nm to 8 nm.

The present invention provides optoelectronic devices containing at least one conforming, thin film barrier coating provided on a nonplanar surface comprising a plurality of junctures. The barrier coating has a hybrid morphology including crystalline domains distributed in an amorphous matrix. The conformal coatings protect the optoelectronic device with long-lasting, durable, high quality barrier protection even though the coatings have sufficient crystalline characteristics so that many embodiments are electrically conductive.

The invention provides a Fe-based nano crystal soft magnetic alloy material and a preparation method thereof. A molecular formula of the material is FeaNbbBcCud, wherein, a, b, c and d respectively present atom percentage content of corresponding elements, a is greater than or equal to 80 and less than or equal to 85, b is greater than or equal to 1 and less than or equal to 3, c is greater than or equal to 12 and less than or equal to 18, d is greater than or equal to 0.8 and less than or equal to 1.2, wherein, sum of a, b, c and d is 100. The alloy material has high Fe element content and low Nb element content, production cost is reduced; a structure comprises an amorphous matrix and an alpha-Fe NANO crystal grain phase with average crystal grain size less than 20nm body-centered cubic, the alloy material has high saturation magnetic induction intensity and low coercive force, so that the Fe-based nano crystal soft magnetic alloy material has the advantages of low cost and good soft-magnetic performance, and has good application prospect.

A nanocrystalline alloy ribbon has an alloy composition represented by FeCu_xB_ySi_zA_aX_b where 0.6≦x<1.2, 10≦y≦20, 0<z≦10, 10≦(y+z)≦24, 0≦a≦10, 0≦b≦5, with the balance being Fe and incidental impurities, where A is an optional inclusion of at least one element selected from Ni, Mn, Co, V, Cr, Ti, Zr, Nb, Mo, Hf, Ta and W, and X is an optional inclusion of at least one element selected from Re, Y, Zn, As, In, Sn, and rare earth elements, all numbers being in atomic percent. The ribbon has a local structure having nanocrystals with average particle sizes of less than 40 nm dispersed in an amorphous matrix, the nanocrystals occupying more than 30 volume percent of the ribbon and has a radius of ribbon curvature of at least 200 mm.

The invention discloses an Fe-based nanocrystalline soft magnetic alloy. The molecular formula of the alloy is FeaSibBcMdCuePfAlg, M refers to the metallic element Nb, Mo, V, Mn or Cr, a, b, c, d, e,f and g are mole percentage content of corresponding atoms, b is larger than or equal to 6 but smaller than or equal to 15, c is larger than or equal to 5 but smaller than or equal to 12, d is largerthan or equal to 0.5 but smaller than or equal to 3, e is larger than or equal to 0.5 but smaller than or equal to 1.5, f is larger than or equal to 0.5 but smaller than or equal to 3, g is larger than or equal to 0.5 but smaller than or equal to 10, and the balance is Fe and inevitable trace impure elements; the structure of the Fe-based nanocrystalline soft magnetic alloy is the two-phase alloywith the Fe adopting the body-centered cubic structure and Fe(Si, Al) mixed nanocrystalline grains embedded in an amorphous matrix, and the average size ranges from 10 nm to 13 nm. The invention further provides a preparation method of the Fe-based nanocrystalline soft magnetic alloy. The method includes two-step heating and two-step cooling heat treatment. The Fe-based nanocrystalline soft magnetic alloy has the advantages of low cost, excellent soft magnetic property, high corrosion resistance as well as good manufacturability and heat treatment processability, and has the broad applicationprospects in the fields of noise suppression, filtration, wireless charging and the like in complex and harsh environments.

Magneto-elastic amorphous alloy material and a preparation method thereof are provided. The material is composed of FexReyBz, wherein, Re is one or more than two of La, Sm, Tb, Dy and Y. The preparation method is to mix and melt the FexReyBz into master alloy according to the atom percentage, produce amorphous wires on self-developed wire spraying equipment, strengthen internal stress through drawing the wires and improve the magneto-elastic performance of the wires. The material is provided with the 10<-3> vertical large magnetostrictive coefficient. And through the quenching and rapid setting preparation method, extremely large inner stress gradient from the surface to the core of the wires is made. The material is also provided with large inner stress anisotropy performance, and part of magneto-elastic performance is produced. The surface crystallization layer of the wires, the thickness of which is tens of nanometers to hundreds of nanometers, and amorphous matrixes produce magnetocrystalline anistotropy energies which strengthen the magneto-elastic performance of the wires. The material is provided with the vertical large magnetostrictive coefficient and makes use of a self-developed displacement sensor and a measurement instrument. Compared with the present import super-magnetostrictive displacement sensor, the sensor has the advantages of large investigation depth, high precision and strong vibration resistance capacity.

The invention relates to a glass-ceramic material having SiO₂, Na₂O and CaO as main components and comprising crystalline particles of SiO₂ dispersed homogeneously in the volume of an amorphous matrix. Such a material has good mechanical strength, in particular good resistance to scratch propagation and allows improved tempering. This material furthermore has a pleasant aesthetic appearance.