Method for preparing low-melting-point alloy-coated ceramic-phase reinforced body/aluminum-matrix composite materials

A technology of aluminum-based composite materials and reinforcements, which is applied in the field of preparation of low-melting-point alloy-coated ceramic phase reinforcements/aluminum-based composite materials, can solve problems such as complex processes, and achieve the effects of simple processes and shortened production cycles

Inactive Publication Date: 2010-04-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the complex process of coating the reinforcement surface by the so

Method used

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  • Method for preparing low-melting-point alloy-coated ceramic-phase reinforced body/aluminum-matrix composite materials
  • Method for preparing low-melting-point alloy-coated ceramic-phase reinforced body/aluminum-matrix composite materials

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specific Embodiment approach 1

[0008] Specific embodiment one: the preparation method of low-melting point alloy coating ceramic phase reinforcement / aluminum-based composite material in this embodiment is as follows: 1. Bismuth nitrate aqueous solution, lead nitrate aqueous solution, indium chloride aqueous solution and tin chloride aqueous solution Two or more kinds are added to the dilute nitric acid solution to obtain a mixed solution with a pH value of 1 to 8; 2. Add the mixed solution obtained in step 1 and the ammonia solution dropwise at the same time at a stirring speed of 1r / min to 300r / min Into the aqueous solution of the reinforcement until the pH value is 6-14, stop dropping; 3. Make the reinforcement treated in step 2 into a preform, and then keep the preform at a temperature of 350°C-1100°C for 30min-120min, That is, the ceramic phase reinforcement coated with metal oxide is obtained; 4. Put the ceramic phase reinforcement coated with metal oxide obtained in step 3 into the mold, and then injec...

specific Embodiment approach 2

[0012] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the preparation method of low-melting point alloy coating ceramic phase reinforcement / aluminum matrix composite material is as follows: 1. Bismuth nitrate aqueous solution, lead nitrate aqueous solution, indium chloride aqueous solution and tin chloride aqueous solution are added to dilute nitric acid solution to obtain a mixed solution with a pH value of 6; 2. Add the mixed solution and ammonia solution obtained in step 1 dropwise to the aqueous solution of the reinforcement until the pH value is 10, and the added solution Stir at a speed of 200r / min during the process; 3. Make the reinforced body treated in step 2 into a prefabricated part, and then keep the prefabricated part at a temperature of 1000°C for 100 minutes to obtain a ceramic phase reinforced body coated with metal oxide; 4. Put the metal oxide-coated ceramic phase reinforcement obtained in step 3 into the m...

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the pH value of the solution is adjusted to 5 in Step 1. Others are the same as in the first or second embodiment.

[0016] The damping value of the aluminum matrix composite material prepared by using the ceramic phase reinforcement obtained in this embodiment is 0.016-0.018 at a temperature of 25° C. and a frequency of 70 Hz.

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Abstract

The invention provides a method for preparing low-melting-point alloy-coated ceramic-phase reinforced bodies/aluminum-matrix composite materials, which relates to a method for coating ceramic-phase reinforced bodies. The invention solves the problem that a sol-gel method is complex in the process of coating the surfaces of reinforced bodies with coatings. The method comprises the following steps: adding two or more than two of bismuth nitrate aqueous solution, lead nitrate aqueous solution, indium chloride aqueous solution and stannic chloride aqueous solution to dilute nitric acid solution and adding the obtained liquid mixture and ammonia solution dropwise to reinforced-body solution till the pH is between 6 and 14; preparing reinforced bodies into prefabticated pieces and preserving heat at a temperature between 350 and 1,100 DEG C; obtaining the ceramic-phase reinforced bodies coated with metal oxide; and preparing the composite materials by utilizing a squeeze casting method. The method is simple in process and shortens the production cycle of the composite materials. The damping value of the aluminum-matrix composite materials obtained by applying the method is 0.016 to 0.018 at 25 DEG C on a frequency of 70 Hz.

Description

technical field [0001] The invention relates to a preparation process of a high-damping aluminum-based composite material. Background technique [0002] The interface is a unique and extremely important component of aluminum matrix composites. In the research of metal matrix composites, the interface between the reinforcement and the matrix has always been the focus of attention. After years of attempts, scientists from various countries have invented a variety of The method is to apply different coatings on the surface of the reinforcement to improve the interface structure of the metal matrix composite material, so as to achieve the purpose of improving the performance of the aluminum matrix composite material. The process of coating the surface of the reinforcement with the sol-gel method is complicated, requiring two or more coatings and more than two sintering processes, which leads to a long production cycle of the composite material (about 7 days), In addition, the u...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00B22D17/00C22C47/12C22C49/06C22C49/14C22C101/22C22C101/14
Inventor 刘刚胡津侯震
Owner HARBIN INST OF TECH
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