37results about How to "Good Amorphous Formation Ability" patented technology

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 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.

An iron-based amorphous alloy material with high glass-forming capability consists of the elements of Fe, Cr, Mo, C, B, Y and Co, wherein the atomic number ratio of the Fe, Cr, Mo, C, B, Y and Co are (24-32%):(16-24%):15%:14%:15%:6%:2%; the atomic number ratio of the elements of Fe, Cr, Mo, C, B, Y and Co are 24%:24%:15%:14%:15%:6%:2%; the atomic number ratio of the elements of Fe, Cr, Mo, C, B, Y and Co are 28%:20%:15%;14%:15%:6%:2%; and the atomic number ratio of the elements of Fe, Cr, Mo, C, B, Y and Co are 32%:16%:15%:14%:15%;6%:2%. The iron-based amorphous alloy material not only has a simple preparation technology, is low in cost, but also has good amorphous-forming capability and glass-forming capability, and also has mechanical properties with high strength and high hardness.

A CuZrNb-series non-crystal alloy block with high thermal stability, hardness and yield strength has a formular: (CuxZr1-x)1-yNby, where x=40-65 wt.% and y=1-15 wt.%.Its preparing steps include smelting pure Zr and Nb metals in non-consumable electroarc furnace under protection of argon gas, cooling, turning it over, loading in water-cooled copper crucible, smelting several times to obtain Zr(Nb) prealloy, mixing with Cu, smelting several times to obtain uniform CuZrNb alloy and negative-pressure casting with copper mould.

The invention discloses a Fe-based block noncrystal alloy and making method, which comprises the following steps: (1) allocating raw material with 48-70% Fe, 23-37% Nd, 4-10% Al and 2-6% B; (2) adopting copper mould suction adsorbing casting method to make the non-crystal alloy; (3) adding 2-8T pulse magnetic field with frequency at 0.02-0.05Hz; annealing in the vacuum under 100-350 deg.c for 10-30 min.

The invention provides a multielement Mg-based amorphous alloy and belongs to the technical field of amorphous alloy. The multielement Mg-based amorphous alloy is characterized in that Mg65Cu22Ni3Y10-xNdx (x is 0,2,4,5,6 or 8) block amorphous alloy is prepared by using a wedge-shaped copper mould casting method, wherein the alloy with the best amorphous formation capacity is a Mg65Cu22Ni3Y5Nd5 amorphous alloy, and the amorphous formation critical thickness of the Mg65Cu22Ni3Y5Nd5 amorphous alloy is 3.6mm which is the maximum; the amorphous formation critical thickness of the Mg65Cu22Ni3Nd8Y2 alloy with the poorest amorphous formation capacity is also equivalent to that of the Mg65Cu22Ni3Y10 alloy, which indicates after Y is replaced by Nd, the amorphous formation capacity of the alloy is improved at different degrees; and the alloy with the best thermal stability is Mg65Cu22Ni3Y8Nd2 amorphous alloy, and the thermal stability of the Mg65Cu22Ni3Y8Nd2 amorphous alloy is greatly improved as compared with that of the Mg65Cu22Ni3Y10 alloy.

The application discloses a corrosion-resistant composite for a water turbine, and a preparation method and an application thereof. The corrosion-resistant composite for the water turbine is formed by compositing Fe-based amorphous material and in-situ synthesized boride, and consists of components by following specific weight percentage: 26wt% of Cr, 5-15wt% of B, 3wt% of Si, 3wt% of Cu, 5wt% of Ni, 10wt% of Mo and the balance Fe. The raw materials for preparing the corrosion-resistant composite for the water turbine are fed into a vacuum gas atomization furnace so as to be smelted and atomized, and amorphous material/boride composite powder is obtained after powder screening. When the amorphous material/boride composite powder is used for preparing a corrosion-resistant composite coating, the coating is prepared by adopting a hypersonic flame spraying technology. The corrosion-resistant composite for the water turbine can obtain the composite coating good in bonding strength with a base body, high in hardness, and excellent in corrosion resisting performance.

The invention discloses an Al-Ni-Y-Ca aluminum-based amorphous alloy and a preparation method thereof, and relates to the field of amorphous alloys. Nominal chemical components of the aluminum-based amorphous alloy are Al85-xNi7Y8Cax, where x is greater than 0 and smaller than 6; the atomic percent of Al+Ca is 85 percent, the atomic percent of Ni is 7 percent, and the atomic percent of Y is 8 percent. The alloy is prepared by using a melt-spinning method, Ar gas is adopted for protection, the injection pressure is 0.8MPa, the rotating speed of a copper roller is 30m/s, and the vacuum degree is 0.1 to 2Pa. The obtained aluminum-based amorphous alloy has a simple system, is low in cost, has good amorphous forming ability and thermal stability, and has a wide application prospect.

The invention discloses a method for inducing A184Ni10Gd6 amorphous alloy to generate phase separation. The method comprises the following steps: performing corrosion treatment on an A184Ni10Gd6 amorphous alloy strip in a nitric acid methanol solution, and washing to obtain an amorphous sample subjected to phase separation. The amorphous strip can be induced to generate phase separation by using a simple corrosion method, the method is simple and feasible, and the prepared sample is still in an amorphous state without conspicuous crystallization phenomenon. The corroded amorphous strip has honeycomb shaped holes, can be used for preparing a nano porous material and can be used in the fields such as catalysis and batteries. In addition, the plasticity of the amorphous alloy subjected to phase separation can be improved, expansion of a shearing zone can be obstructed by the second phase in partial areas, and thus the plasticity can be improved.

The invention discloses an iron-based amorphous/carbon nanotube composite material for a low-loss and high-corrosion-resistance transformer iron core and a preparing method and application of the iron-based amorphous/carbon nanotube composite material. The material comprises 98.5 wt%-99.5 wt% of an iron-based amorphous structure and 0.5 wt%-1.5 wt% of a carbon nanotube. The iron-based amorphous structure comprises following components including, by weight percent, 28 wt% of Cr, 3 wt% of B, 6 wt% of Si, 4 wt% of P, 5 wt% of Ni, 8 wt% of Mo 3wt% of Nb, and the balance Fe. The carbon nanotube isprepared through a chemical vapor deposition method. Firstly, raw materials for preparing the iron-based amorphous structure are added into a vacuum gas atomization furnace to be smelted and atomized,powder screening is conducted, then, 304 stainless steel is adopted for wrapping the powder, and a wire is formed. According to application of the finished wire to preparing of iron-based amorphous/carbon nanotube composite electromagnetic shielding materials, the rapid quenching technology is adopted for preparing an amorphous strip, and two spraying ports are adopted in the rapid quenching process for continuous and uniform spraying of the iron-based amorphous structure and the carbon nanotube. The prepared composite material is low in loss, high in energy efficiency and good in corrosion resisting performance, and wide application prospects are achieved.

The invention discloses zircon-based amorphous alloy. The zircon-based amorphous alloy is composed of Zr, Hf, Al, Cu, Ni, Y and Ag elements. The zircon-based amorphous alloy is composed of, by atomic molar percentage, 40-70% of Zr, 1-10% of Hf, 15-40% of Al, 5-15% of Cu, 5-15% of Ni, 0.2-5% of Y and 0.2-5% of Ag. The zircon-based amorphous alloy is good in glass forming ability (GFA) and good in glass forming capacity, the zircon-based amorphous alloy is a specular surface after being formed and does not need to be additionally machined, and the cost is low.