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Preparation method of surface nano aluminum oxide coating of ceramic-phase enhancer

A technology of nano-alumina and reinforcement, applied in coating, metal material coating process, fusion spraying, etc., can solve the problems of poor wettability, large performance difference, loss of mechanical properties of composite materials, etc., and achieve tensile strength Increased strength, small performance differences, and improved interface effects

Active Publication Date: 2013-01-23
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of the composite material of the reinforcement / matrix due to large performance difference, poor wettability, and interface reaction between the ceramic phase reinforcement and the aluminum matrix in the existing technical method. The problem of loss of mechanical properties provides a preparation method of nano-alumina coating on the surface of ceramic phase reinforcement

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  • Preparation method of surface nano aluminum oxide coating of ceramic-phase enhancer

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specific Embodiment approach 1

[0012] Embodiment 1: This embodiment provides a method for preparing a nano-alumina coating on the surface of a ceramic phase reinforcement, which is specifically completed in the following steps:

[0013] 1. Add water to the ceramic reinforcement, stir at a rate of 100r / min~500r / min for 30min~100min, then ultrasonicate at a frequency of 20kHz~60kHz for 30min~100min to obtain a water dispersion of ceramic reinforcement; among them, water and ceramic reinforcement The mass ratio of the body is (20~40):1;

[0014] 2. Add water to the aluminum salt to prepare an aluminum salt aqueous solution with a molar concentration of 0.001mol / L~0.1mol / L;

[0015] 3. Under the condition of stirring at a rate of 100r / min~500r / min, add the alkali solution and the aluminum salt solution obtained in step 2 to the ceramic reinforcement aqueous dispersion obtained in step 1 at the same drop rate, and During the dropping process, the pH value of the water dispersion of the ceramic reinforcement is ...

specific Embodiment approach 2

[0019] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the shape of the ceramic reinforcement in Step 1 is a mixture of one or more of particles, fibers and whiskers. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of water to ceramic reinforcement in Step 1 is (25-35):1. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a surface nano aluminum oxide coating of a ceramic-phase enhancer, relating to the field of preparation methods of surface coatings of ceramic-phase enhancers. The preparation method aims at solving the problem that the mechanical property of a composite material of an enhancer / matrix is consumed to some extent due to the bigger performance difference between the ceramic-phase enhancer and an aluminum matrix, poor wettability and an interface reaction between the ceramic-phase enhancer and the aluminum matrix in a conventional technical method. The preparation method of the surface nano aluminum oxide coating of the ceramic-phase enhancer comprises the following steps of: (1) preparing a ceramic enhancer aqueous dispersion solution; (2) preparing an aluminum salt aqueous solution; and (3) preparing the surface nano aluminum oxide coating of the ceramic-phase enhancer. The preparation method is applied to the field of material processing.

Description

technical field [0001] The invention relates to a method for preparing a ceramic phase reinforcement surface coating. Background technique [0002] Metal matrix composites are widely used in the fields of aviation, aerospace, military and automobiles. Over the past decade, the development of aerospace, automation and sports product industries has greatly promoted the research and application of metal matrix composites. In the study of metal matrix composites, the reinforcement / matrix interface has always been the focus of attention, because the bonding state of the interface region strongly affects the comprehensive properties of composites. In the existing technical methods, due to the large performance difference between the ceramic phase reinforcement and the aluminum matrix, the wettability between the two is poor, and the interface reaction between the two makes the mechanical properties of the composite material of the reinforcement / matrix There is a loss in performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C09D5/46C23C4/10
Inventor 唐莎巍柳超胡津
Owner HARBIN INST OF TECH