Intermetallic compound ultrafine particle reinforced metal-based composite material and preparation method thereof

Patent metadata

Field	Value
Publication number	US-9869006-B2
Application number	US-201314375034-A
Country	US
Kind code	B2
Filing date	May 31, 2013
Priority date	Oct 25, 2012
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

This invention disclosed a method for preparing the ultrafine intermetallic particles reinforced metal matrix composites (MMC). The particle size of ultrafine intermetallic particles is about 0.01˜5 μm. In this method, intermetallic particles and metal matrix were first ball milled together to get the mixed powder. Then, powders were cold-pressed then vacuum melting with metals to prepare the reinforced metal matrix composites materials. The intermetallic particles addition amount in this is 1˜30 wt %. This invention improve the dispersion properties of intermetallic particles while increase the particle/matrix interface strength. The ultrafine intermetallic particles reinforced MMC shows the very good performance with good ductility and strength.

First claim

We claim:

1. A preparation method of an ultrafine intermetallic particle reinforced metal matrix composite (MMC), including the following steps:
Step 1: grinding reinforcement intermetallic particles and a metal additive together using a planetary ball mill to obtain a mixed composite powder with particle size 0.01-5μm;
Step 2: cold-pressing the mixed composite powder, at a pressure of 1-20 MPa, to obtain a pre-pressed block;
Step 3: vacuum melting the pre-pressed block and metal elements of an alloy to obtain the ultrafine intermetallic particle reinforced MMC, wherein
the reinforcement intermetallic particles are uniformly dispersed in an alloy matrix comprising the metal elements of the alloy in Step 3 and the metal additive; and
the amount of the reinforcement intermetallic particles in the ultrafine intermetallic particle reinforced MMC is 1-30 wt %.

2. The preparation method according to claim 1 , wherein the reinforcement intermetallic particles are rare earth metal compounds.

3. The preparation method according to claim 1 , wherein the alloy in Step 3 is a magnesium alloy or an aluminum alloy.

4. The preparation method according to claim 3 , wherein the magnesium alloy is a Mg-0.1-40wt % Li alloy.

5. The preparation method according to claim 1 , wherein the metal additive is magnesium-based metal shavings or powder, aluminum metal shavings or powder.

6. The preparation method according to claim 1 , wherein the mass ratio of the metal additive and the reinforcement intermetallic particles are from 1:3 to 3:1.

7. The preparation method according to claim 2 , wherein the reinforcement intermetallic particles are YAl 2 or CeAl 2 .

8. The preparation method according to claim 3 , wherein the aluminum alloy is a Al-0.1-15wt % Li alloy.

Assignees

• Univ Beihang

Inventors

• Wu Guoqing
• Zhang Qingqing
• Li Zhiyan
• Huang Zheng

Classifications

• C22C21/06

  with magnesium as the next major constituent · CPC title

• C22C24/00

  Alloys based on an alkali or an alkaline earth metal · CPC title

• C22C1/026

  Alloys based on aluminium · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• C22C1/02 Primary

  by melting {(C22C1/1036 takes precedence)} · CPC title