A kind of chopped carbon fiber reinforced magnesium aluminum matrix composite material and preparation method thereof

Abstract

The invention provides a preparation method of a short carbon fiber reinforced magnesium-aluminum based composite. The preparation method comprises the following steps of providing zirconium carbide powder and silicon carbide powder; performing ball milling on the zirconium carbide powder and the silicon carbide powder to obtain first mixed powder; performing isostatic cool pressing on the first mixed powder to obtain a first reinforced particle mass; performing vacuum heat treatment on the first reinforced particle mass to obtain a second reinforced particle mass; putting a magnesium-aluminummetallic ingot and the second reinforced particle mass in a vacuum heating furnace for compound heat treatment to obtain a particle reinforced magnesium-aluminum metal liquid; providing short carbonfibers, and performing preheating on the short carbon fibers; performing semi-solid stirring on the particle reinforced magnesium-aluminum metal liquid, and adding the preheated short carbon fibers inthe particle reinforced magnesium-aluminum metal liquid in the semi-solid stirring process to obtain a short carbon fiber reinforced magnesium-aluminum metal liquid; and using the short carbon fiberreinforced magnesium-aluminum metal liquid to perform pouring to obtain the short carbon fiber reinforced magnesium-aluminum based composite.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a chopped carbon fiber reinforced magnesium-aluminum matrix composite material and a preparation method thereof. Background technique [0002] Magnesium-aluminum alloy is a kind of alloy, the general density is 1.8g cm -3 Or so, the low density of alloys of magnesium and aluminum gives them increased specific properties. Magnesium-aluminum alloy has good strength, rigidity and dimensional stability. At present, magnesium-aluminum alloy is usually used for the casing of mid-to-high-end ultra-thin or small-sized notebooks. The silver-white aluminum-magnesium alloy shell can make the product more luxurious and beautiful, and it is easy to color, and can be turned into personalized powder blue and pink through the surface treatment process, which adds a lot of color to the laptop. This is engineering plastics and carbon fiber incomparable. However, the performance of ordinary m...

AI Technical Summary

Problems solved by technology

However, it is well known that magnesium-aluminum alloys are difficult to process, and how to uniformly add these particles into magnesium-aluminum alloys is a long-standing technical problem in this field.

In the prior art, an in-situ method has been developed to add the second phase particles to the magnesium-aluminum alloy, but this prior art still has certain defects: 1. The method of the prior art can only ensure that TiC particles are added to the magnesium-aluminum alloy, Mg 2 Si-based particles, etc., cannot be added to particles of other systems; 2. The in-situ method of the prior art can only reduce the difficulty of adding particles, but cannot greatly improve the mechanical properties of magnesium-aluminum alloys

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