Method for preparing TiB2 reinforced aluminium matrix composite in situ

A technology for reinforcing aluminum matrix and composite materials, which is applied in the field of in-situ preparation of TiB2 reinforced aluminum matrix composite materials, can solve the problem that it is difficult to obtain TiB2 reinforced equalization, and achieve the effect of easy operation and simple process

Active Publication Date: 2012-11-21
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reported TiB 2 Most of the reinforcing particles are about 1 μm, and it is difficult to obtain evenly distributed ultrafine

Method used

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  • Method for preparing TiB2 reinforced aluminium matrix composite in situ
  • Method for preparing TiB2 reinforced aluminium matrix composite in situ
  • Method for preparing TiB2 reinforced aluminium matrix composite in situ

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preparation example Construction

[0024] In view of the existing TiB prepared in the prior art 2 To solve the problem that the particle size of the reinforcement phase is too large and the distribution is uneven, the present invention discloses a TiB with submicron or even nanometer 2 The preparation method of the aluminum-based composite material of the reinforcement phase is characterized in that the method comprises the following steps:

[0025] (1) Preparation of ball-milled composite powder

[0026] a. KBF 4 Powder, K 2 TiF 6 After the powder is mixed with Al powder, it is ground and dried to obtain a composite powder.

[0027] b. After the composite powder is placed in a ball mill for ball milling, it is dried again to obtain a ball mill composite powder;

[0028] (2) Preparation of composite powder sintered billet

[0029] a. Using a tablet press, the ball mill compound powder is cold-pressed into a prefabricated block under a certain pressure,

[0030] b. Place the prefabricated block in a heat ...

Embodiment 1

[0052] (1) Add 7.2g KBF 4 Powder (purity ≥ 98%, produced by Tianjin Kemiou Chemical Reagent Co., Ltd.), 6.9g K 2 TiF 6 Powder (purity ≥99.5%, produced by Tianjin Kemiou Chemical Reagent Co., Ltd.) and 25g Al powder (purity ≥99.5%, produced by Tianjin Kemiou Chemical Reagent Co., Ltd.) mixed (K 2 TiF 6 Powder and KBF 4 The atomic ratio of Ti and B in the powder is about 1:2, KBF 4 Powder and K 2 TiF 6 The mass ratio of powder to Al powder is about 1:1.8), the mixture is ground in an agate mortar, dried in an electric constant temperature blast dryer at 180°C for 2 hours, and then placed in a ball mill for ball milling (ball milling time is 1 Hours, the ball milling method is reversed every 30 minutes, the frequency conversion speed is 30Hz, and the ball-to-material ratio is 5:1), and then dried in an electric constant temperature blast dryer at 180°C for 2 hours to obtain ball milled composite powder;

[0053] (2) Use a tablet press (tablet press model: 769YP-24B) to col...

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Abstract

The invention discloses a method for preparing a TiB2 reinforced aluminium matrix composite in situ. The method comprises the following steps of: (1) preparing ball milled composite powder; (2) preparing a composite powder sintering blank; and (3) preparing the TiB2 reinforced aluminium matrix composite. The method disclosed by the invention is simple in process and is easy to operate. A reinforced phase in the composite prepared by the method disclosed by the invention has small particle size and is uniformly distributed.

Description

technical field [0001] The invention relates to an in-situ preparation of TiB 2 Methods of strengthening aluminum matrix composites. Background technique [0002] Metal matrix composites (MMCs) have broad application prospects in aerospace and automobile manufacturing industries due to their excellent properties such as high specific strength, high specific modulus, wear resistance and high temperature resistance. For a long time, the research on the preparation process of aluminum matrix composites has been focusing on the traditional methods of compounding with external reinforcement, such as powder metallurgy, stirring casting, squeeze casting and so on. These methods are not only complicated in process and high in cost, but also have problems such as poor compatibility between the reinforcement and the matrix, which limits their industrial application to a certain extent. The preparation of metal matrix composites by in situ synthesis technology can effectively solve t...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/00C22C32/00
Inventor 王同敏高磊陈宗宁邹存磊曹志强李廷举
Owner DALIAN UNIV OF TECH
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