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The preparation methods of amorphous materials

by:Transmart     2020-05-31
Preparation technology of amorphous materials mainly include two categories: one is the freezing method, because of the multiple sets of yuan block amorphous system has the very high amorphous formation ability, the critical cooling rate is small, so the use of some traditional metallic melts involving eutectic solidification technology can, 2 it is powder metallurgy method, which is in the supercooled liquid phase within the temperature range of district, amorphous powder by hot pressing or form block amorphous alloy extrusion method, this method is mainly used the multiple sets of alloy system of supercooled liquid of high stability, and have the characteristics of viscous liquid. 1, liquid quenching method: the alloy for quartz tube, after the melt quenching into flowing water, along with quartz tube to realize fast cooling, forming a bulk amorphous alloy. 2, arc smelting of copper casting: under inert gas protection using the arc rapid alloy is heated to liquid, and then use the molten alloy directly negative pressure suction by circulating water cooling of copper, the use of water cooling copper heat conduction quickly realize rapid cooling, to get the bulk amorphous alloy. 3, induction heating of copper casting method: put alloy at the bottom of the hole of the quartz tube, make through inductor in the alloy produced by eddy current heating of the alloy melt quickly. 4, jet molding in: jet molding in is to master alloy at the bottom there are holes in the quartz tube, after the mother alloy melt, guide people hydrogen gas in the upper part of the quartz tube, let mother liquid alloy spewing from the hole, under the action of the pressure on people at the bottom of the water-cooled copper mold, make the fast cooling of amorphous alloy. 5, pressure casting process model: the alloy melt in the melting chamber, and then the molten alloy to a certain speed and pressure into the metal mould cavity, in order to realize fast cooling and formation of bulk amorphous alloy. 6, directional solidification method: directional solidification method can get continuous bulk amorphous alloy, it has two main control parameters, namely the directional solidification rate V G the solid-liquid interface and the liquid phase and temperature gradient, the cooling rate of directional solidification method can be calculated by these two parameters, namely the Rc = GV. 7, mechanical alloying method: is the element powder mixed in proportion, under the protection of high purity argon, mechanical alloying preparation of amorphous alloy in ball mill. 8, consolidation molding in: is the element of powder in the supercooled temperature range for the superplastic deformation and consolidation molding. 9, continuous casting method.
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