Method for making magnesium-based composite material and equipment for making the same

Abstract

A method for fabricating a magnesium-based composite material, the method includes the steps of: (a) providing a large amount of magnesium-based powder and a large amount of nanoscale reinforcements; (b) uniformly mixing the magnesium-based powder and the nanoscale reinforcements to form a mixture; and (c) compacting the mixture at a high velocity in a protective gas to achieve the magnesium-based composite material. High velocity compaction equipment for fabricating the magnesium-based composite material includes a sealing chamber, a gas pumping device, a mold, and a hammer. The gas pumping device is connected to the sealing chamber. The mold is disposed in the sealing chamber with an aperture formed on the top thereof. The hammer is disposed in the sealing chamber and above the mold, and moving along longitudinal thereof at a controllable ramming speed.

Description

BACKGROUND[0001]1. Field of the Invention[0002]The present invention relates to methods for fabricating composite materials and equipments for fabricating the same, and, particularly, to a method for fabricating a magnesium-based composite material and equipment for fabricating the same.[0003]2. Discussion of Related Art[0004]Nowadays, various alloys have been developed for special applications. Among these alloys, magnesium-based alloys have relatively superior mechanical properties, such as good wear resistance, and high elastic modulus. Generally, two kinds of magnesium-based alloys have been developed: casting magnesium-based alloy and wrought magnesium-based alloy. However, the toughness and the strength of the magnesium-based alloys are not able to meet the increasing needs of the automotive and aerospace industries for tougher and stronger alloys.[0005]To address the above-described problems, magnesium-based composite materials have been developed. In the magnesium-based comp...

AI Technical Summary

Benefits of technology

[0007]In one embodiment, a method for fabricating a magnesium-based composite material includes the steps of: (a) providing a large amount of magnesium-based powder and a large amount of nanoscale reinforcements; (b) uniformly mixing the magnesium-based powder and the nanoscale reinforcements to form a mixture; and (c) compacting the mixture at a high velocity in a protective gas to achieve the magnesium-based composite material.

Problems solved by technology

However, the toughness and the strength of the magnesium-based alloys are not able to meet the increasing needs of the automotive and aerospace industries for tougher and stronger alloys.

However, in stir casting, the nanoscale reinforcements are added to metal or alloy melt and are prone to aggregation.

As such, the nanoscale reinforcements are not well dispersed.

However, the conventional HVC can't be used in the production of the magnesium-based composite materials as the magnesium is easily oxidized in powder form.

In particular, the magnesium powder may spontaneously combust due to oxidization.

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