Amorphous alloy-reinforced and toughened aluminum matrix composite and preparation method thereof

Patent metadata

Field	Value
Publication number	US-12084753-B2
Application number	US-202318112075-A
Country	US
Kind code	B2
Filing date	Feb 21, 2023
Priority date	Jun 22, 2022
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

Provided are an amorphous alloy-reinforced and toughened aluminum matrix composite (AMC) and a preparation method thereof. The amorphous alloy-reinforced and toughened AMC includes 55 vol. % to 95 vol. % of an aluminum-based alloy and 5 vol. % to 45 vol. % of an amorphous alloy, wherein the amorphous alloy is Fe 52 Cr 26 Mo 18 B 2 C 12 .

First claim

What is claimed is:

1. A method for preparing an amorphous alloy-reinforced and toughened aluminum matrix composite (AMC), comprising the following steps:
(1) mixing a powder of an aluminum-based alloy with an amorphous alloy to obtain a third mixed powder; and
(2) subjecting the third mixed powder obtained in step (1) to continuous extrusion and heat treatment sequentially to obtain the amorphous alloy-reinforced and toughened AMC,
wherein the amorphous alloy-reinforced and toughened AMC comprises 55 vol. % to 95 vol. % of an aluminum-based alloy and 5 vol. % to 45 vol. % of an amorphous alloy, wherein the amorphous alloy is Fe 52 Cr 26 Mo 18 B 2 C 12 .

2. The method of claim 1 , wherein in step (2), the continuous extrusion is conducted at a rotational speed of 4 rpm to 10 rpm and a strain capacity of greater than 1.

3. The method of claim 1 , wherein in step (2), the heat treatment is conducted by heating an extruded material obtained after the continuous extrusion to a treating temperature of 400° ° C. to 550° C., and holding at the treating temperature under a pressure of 30 MPa to 60 MPa for 5 min to 15 min.

4. The method of claim 1 , wherein the amorphous alloy-reinforced and toughened AMC comprises 60 vol. % to 90 vol. % of the aluminum-based alloy and 10 vol. % to 40 vol. % of the amorphous alloy.

5. The method of claim 1 , wherein the amorphous alloy-reinforced and toughened AMC comprises 70 vol. % to 80 vol. % of the aluminum-based alloy and 20 vol. % to 30 vol. % of the amorphous alloy.

6. The method of claim 1 , wherein the aluminum-based alloy comprises one selected from the group consisting of Al-12Si, a 7075 aluminum alloy, and an Al-9Si-3Cu-0.8Zn alloy.

7. The method of claim 1 further comprising the following steps:
1) mixing an iron powder, a chromium powder, a molybdenum powder, a boron powder, and a carbon powder according to an atomic percentage of each atom of the amorphous alloy to obtain a first mixed powder; and
2) adding a protective agent to the first mixed powder obtained in step 1) to obtain a second mixed powder, and subjecting the second mixed powder to mechanical alloying to obtain the amorphous alloy.

8. The method of claim 7 , wherein in step 2), the protective agent is stearic acid, and is used in an amount of 1 wt. % to 2 wt % of the first mixed power, and
the mechanical alloying is conducted by ball milling in an inert atmosphere.

Assignees

• Univ Kunming Science & Technology

Inventors

• Li Lu
• Lin Guojian
• Wang Xiuchang
• Guo Zhengwei
• Li Chuanyong
• Zhang Xingguo
• Yuan Zhentao

Classifications

• C22F1/04

  of aluminium or alloys based thereon · CPC title

• C22C2200/02

  Amorphous · CPC title

• C22C1/0416

  Aluminium-based alloys · CPC title

• B22F2003/208

  Warm or hot extruding · CPC title

• B22F2009/043

  by ball milling · CPC title