A kind of solid-phase alloying method of Al-Si powder under high pressure condition

Abstract

The invention discloses a solid-phase alloying method of aluminum-silicon powder under high-pressure condition. The applied aluminum-silicon alloy comprises the following components by weight percent: 10% to 80% of aluminum and the balance of silicon. Appropriate granularity proportion of aluminum powder and silicon powder is selected, the prepared aluminum powder and silicon powder are mixed together by using a rotational ball mill in the three-dimensional direction, are subsequently put into a vacuum heating furnace to be subjected to activation treatment, and are further put into a carbon steel sleeve to sinter under high pressure at a temperature lower than the melting point, the sintering time is controlled, and the alloying is realized depending on dispersion under the condition that the aluminum and the silicon are not molten. The solid-phase alloying method is an aluminum-silicon powder solid-phase alloying method that the process course is short, the cost is low and high-quality aluminum-silicon alloy can be obtained under high-pressure condition; and the prepared aluminum-silicon alloy can be widely applied to electronic device materials or functional coating materials.

Description

technical field [0001] The invention relates to a method for realizing alloying through solid-phase sintering lower than the melting temperature of aluminum powder and silicon powder after activation treatment under the action of high pressure, which can be applied to the preparation of high-density aluminum-silicon alloy. Background technique [0002] Aluminum-silicon alloy has the advantages of low density, high hardness, and good thermal conductivity. It can be widely used in a large number of fields such as wear-resistant piston materials, electronic packaging materials, and vacuum sputtering coating materials. Among aluminum-silicon alloys, alloys with a silicon content of about 12% to 25% can be used to prepare lightweight, high-strength, heat-resistant piston cylinder materials, and have practical applications on engine pistons such as motorcycles and automobiles. Aluminum-silicon alloys with a silicon content of 27% to 70% can be used to prepare electronic packaging ...

AI Technical Summary

Problems solved by technology

However, using this method, the relative density of the produced silicon-aluminum alloy is generally below 97%, and some even only have about 90%, which is difficult to meet the use requirements.

Moreover, this production method must use special equipment and special technology with patent rights of Osprey Company, which is limited in production

[0007] In the production of aluminum-silicon alloys with the above processes, there are always some defects and limitations in alloy composition, process methods or production equipment, especially in large-scale production.

Images