A method of adding rare earth oxides to improve the uniformity of composite materials prepared by friction stir processing

A technology of rare earth oxide and friction stir, which is applied in the field of in-situ synthesis of intermetallic compound reinforced metal matrix composites in friction stir processing, which can solve the problems of inhomogeneity of reinforced metal matrix composites and achieve the effect of increasing the amount of formation

Inactive Publication Date: 2017-08-08
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method of adding rare earth oxide (REO) powder to improve friction stir processing (FSP) for the inhomogeneity problem that is difficult to solve by in-situ synthesis of intermetallic compound reinforced metal matrix composites in pure alloy powder friction stir processing. Method for making composite homogeneity

Method used

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  • A method of adding rare earth oxides to improve the uniformity of composite materials prepared by friction stir processing
  • A method of adding rare earth oxides to improve the uniformity of composite materials prepared by friction stir processing
  • A method of adding rare earth oxides to improve the uniformity of composite materials prepared by friction stir processing

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specific Embodiment approach 1

[0029] Such as figure 1 As shown, a method for adding rare earth oxide powder to improve the uniformity of composite materials prepared by friction stir processing, specific implementation mode 1: this implementation mode is achieved through the following steps:

[0030] Step 1: Take a certain percentage of La 2 o 3 The powder and Ni powder are evenly mixed by mechanical stirring, and then sealed and stored; a blind hole is made in the middle of the base pure aluminum plate, the diameter of the blind hole is D, the interval is L, and the depth is H (less than the thickness of the plate); La 2 o 3 The content is La 2 o 3 + 0-9% of the total mass of Ni, the diameter of the holes is 3-6mm, and the hole interval is 4-6mm.

[0031] Step 2: Fill the uniformly mixed powder into the prepared matrix pure aluminum plate and compact it;

[0032] Step 3: Friction stir processing is performed on the powder-filled area on the base pure aluminum plate. The rotation speed of the stirri...

specific Embodiment approach 2

[0033] Specific implementation mode two: combination figure 1 Describe this embodiment mode, the La among the step one of this embodiment mode 2 o 3 The content is 1%, the diameter of the hole is 3mm, the interval is 4mm, the depth of the blind hole is 4mm, the rotation speed of the stirring head is 950 r / min, the welding speed is 30mm / min, the inclination angle of the stirring head is 2°, and the processing passes are 5 times.

specific Embodiment approach 3

[0034] Specific implementation mode three: combination figure 1 Describe this embodiment mode, the La among the step one of this embodiment mode 2 o 3 The content of is 3%, and other steps are identical with specific embodiment two.

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Abstract

The invention discloses a method for adding rare earth oxides to improve the uniformity of composite materials prepared by friction stir processing. Fill the uniformly mixed powder into the prepared base pure aluminum plate and compact it; perform friction stir processing on the filled powder area on the base pure aluminum plate, under the action of shoulder friction heat generation and stirring needle rotation, REO promotes M alloy The powder fully reacts with Al to form Al-M intermetallic compounds and evenly distributes on the matrix, and finally obtains uniform intermetallic compound reinforced metal matrix composites. The invention has the following advantages: it solves the agglomeration phenomenon in the process of in-situ synthesis of composite materials during friction stirring processing of pure alloy powder, and the intermetallic compound reinforcement phase is evenly distributed in the matrix by adding REO.

Description

technical field [0001] The invention relates to a method for in-situ synthesis of intermetallic compound-reinforced metal matrix composite materials by friction stir processing, and in particular to a method for improving the uniformity of composite materials prepared by FSP by adding rare earth oxide powder. Background technique [0002] With the rapid development of aerospace, electronics, and advanced weapon systems, traditional single structural materials are increasingly difficult to meet the needs of light weight, high strength, and high wear resistance. The compounding of materials has become an important direction for material development. Metal matrix composites have attracted extensive attention from researchers because of their high specific strength, high specific modulus, excellent wear resistance, and dimensional stability. Friction stir processing technology is an ideal preparation technology for the synthesis of intermetallic compound composites because it ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04
Inventor 黄春平汪云海王承剑张海军夏春柯黎明
Owner NANCHANG HANGKONG UNIVERSITY
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