Producing method of high steam pressure chalcogen alloy block

Abstract

The invention provides a producing method of high steam pressure chalcogen alloy block. The producing method is to prepare chalcogen (one of gallium, indium, thallium, germanium, tin, lead, antimony, bismuth, selenium, tellurium or polonium) having 0.5-30 atomic percent and metallic materials having the left atomic percent in a predetermined atomic percent, and are placed in a ceramic container for vacuum melting. The alloy melting soup is cooled in a gas or liquid manner, and is condensed and shaped into a casting blank which is crushed into alloy powder. Uniform alloy powder is obtained through screening, and block alloy can be produced by cold press molding and hot pressed sintering. Accordingly, the block alloy having over 99% of high purity, content difference controlled within plus or minus 1%, fine particles and over 90% of density.

Description

technical field [0001] The invention relates to a method for manufacturing a high vapor pressure chalcogen alloy block material, especially a method for manufacturing a chalcogen element alloy block material whose composition accuracy is difficult to control. The alloy is melted, and then prepared into powder and densified and sintered at high temperature to obtain a manufacturing method with correct composition, high uniformity, fine grain, high purity, and high density. Background technique [0002] Vacuum metallization (VM) refers to the organic conversion of metal alloy bulk targets under vacuum conditions by using specific means such as chemistry and physics, so that the metal targets are converted into molecular particles, deposited or adsorbed on plastic or The surface of the metal material forms a metal film, which is what we commonly call the coating; and because the alloy coating has excellent wear resistance, corrosion resistance, coating thickness uniformity, and...

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, it can be used as an alloy manufacturing method for the target. The steps are as follows: First, alloy elements, such as aluminum, copper, nickel, silver, titanium, magnesium, manganese, zinc, indium, tin, chromium and other raw materials, according to After weighing according to the required ratio, put it into the melting crucible; after that, heat the ingot in the atmosphere to completely melt the ingot into a uniform alloy soup; then, pour the molten soup into the mold to form an ingot, and take it out after cooling; finally, carry out For example, heat treatment processes such as forging, hot and cold rolling, and high-temperature annealing, to homogenize the internal structure of the alloy, and then mechanically process it to make the desired shape; however, the above-mentioned alloy manufacturing method is practical. When it is used, it has the following shortcomings: (a) smelting is carried out in the atmosphere, if the melting point of the elements in the alloy is low (for example: the melting point of tin is 232 ° C, the melting point of indium is 157 ° C, etc.), and the vapor pressure If the concentration is too high, it will easily volatilize in the smelting process, thus changing the proportion of alloy components, and even oxidizing with air, so that the target concentration of the alloy cannot be correctly controlled, resulting in changes in the properties of the alloy material; (b) the smelting and casting process often occurs Uneven distribution, leading to segregation (segregation) problems, has a serious impact on the high-temperature properties of the alloy, thereby reducing the reliability of the alloy in high-temperature environments; and (c) some elements (such as: chromium, titanium, silicon, etc.) The oxidation activity at high temperature is extremely high, making it easy to chemically react with crucibles mainly made of magnesia and alumina during atmospheric smelting, which not only erodes the material of the crucible, but even affects the purity of the alloy produced. and quality; in addition, the above-mentioned alloy manufacturing method is mainly a process developed for transition metal elements

[0005] In the periodic table of elements, the elements located between transition metals and gas elements on the right side of the periodic table, whose properties are between metals and non-metals, are collectively called chalcogens, including: Gallium (Ga, Melting point 30°C), indium (In, melting point 115°C), thallium (Tl, melting point 303°C), germanium (Ge, melting point 937°C), tin (Sn, melting point 232°C), lead (Pb, melting point 328°C), Antimony (Sb, melting point 631°C), bismuth (Bi, melting point 271°C), selenium (Se, melting point 217°C), tellurium (Te, melting point 450°C), polonium (Po, melting point 254°C) and other elements; the above elements It is characterized by low melting point, so it often has special phase transition characteristics, and is widely used in recording media, phase transition memory, solar power generation, etc. , so it is very easy to lose a lot during the smelting process, resulting in a large difference between the concentration and the target composition

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