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Preparation method of nanometer bismuth oxide coated ceramic phase reinforcement/aluminum matrix composite

An aluminum-based composite material and nano-bismuth oxide technology, which is applied in the field of preparing nano-bismuth oxide coatings, can solve the problems of poor damping performance of metal-based composite materials, and achieve small coating size, simple coating process, and improved damping performance at room temperature. Effect

Inactive Publication Date: 2016-03-02
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] In order to solve the technical problem of poor damping performance of existing metal matrix composite materials, the present invention provides a preparation method of nano bismuth oxide coated ceramic phase reinforcement / aluminum matrix composite material

Method used

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  • Preparation method of nanometer bismuth oxide coated ceramic phase reinforcement/aluminum matrix composite
  • Preparation method of nanometer bismuth oxide coated ceramic phase reinforcement/aluminum matrix composite
  • Preparation method of nanometer bismuth oxide coated ceramic phase reinforcement/aluminum matrix composite

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specific Embodiment approach 1

[0018] Specific implementation mode one: the preparation method of nano-bismuth oxide-coated ceramic phase reinforcement / aluminum-based composite material in this embodiment is as follows:

[0019] One, bismuth nitrate is dissolved in the concentrated nitric acid, is diluted with water, obtains bismuth nitrate solution, the concentration of bismuth nitrate in the bismuth nitrate solution is 0.00005~0.5mol / L, and the concentration of nitric acid is 0.00001~6mol / L, the concentration of described concentrated nitric acid The mass concentration is 65-68%;

[0020] 2. Disperse the ceramic reinforcement into the bismuth nitrate solution at 20-90°C, and add the ceramic reinforcement to the bismuth nitrate in a ratio of 10-80:1 by mass to obtain a mixed solution;

[0021] 3. Prepare a sodium chloride solution or potassium chloride solution with a concentration of 0.0001-1mol / L;

[0022] 4. Add sodium chloride solution or potassium chloride solution to the mixed solution in step 2 acc...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of bismuth nitrate in the bismuth nitrate solution in step 1 is 0.005-0.05 mol / L, and the concentration of nitric acid is 0.001-3 mol / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the concentration of bismuth nitrate in the bismuth nitrate solution in step 1 is 0.05-0.4 mol / L, and the concentration of nitric acid is 0.01-2 mol / L. Others are different from the first or second specific embodiment.

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Abstract

The invention provides a preparation method of a nano-sized bismuth oxide-coated ceramic phase reinforcement / aluminum-based composite material, which relates to a method for preparing a nano-sized bismuth oxide coating on the surface of a ceramic phase reinforcement by means of heat injection. The preparation method provided by the invention solves the technical problem of poor damping performance of the existing ceramic-reinforced metal-based composite materials. The method is as follows: dispersing a ceramic reinforcement in a bismuth nitrate solution, adding a sodium chloride solution or potassium chloride solution, standing, filtering, then pouring the reinforcement obtained after filtration into a sodium hydroxide solution, stirring or ultrasonically shaking, filtering, pouring the resulting reinforcement into a mould for extrusion to obtain a reinforcement precast product, maintaining the reinforcement precast product at a temperature and then heating in a mould, and injecting molten aluminum or aluminum alloy into the mould while loading a pressure and maintaining the pressure. As compared with a ceramic phase reinforcement / aluminum-based composite material free of bismuth oxide coating, the room-temperature damping performance of the nano-sized bismuth oxide-coated ceramic phase reinforcement / aluminum-based composite material, prepared in the invention, is increased by more than 2.5 times.

Description

technical field [0001] The invention relates to a method for preparing a nano-bismuth oxide coating on the surface of a ceramic reinforcement by means of thermal injection. Background technique [0002] Metal matrix composites not only have high strength and modulus, but also have good mechanical damping properties, and are currently one of the most promising structural-functional damping materials. If damping is the goal, metal matrix composites may not be the best choice, but its combination of high modulus and high damping is unmatched by other materials. In particular, the high degree of designability of the performance of composite materials makes people expect to use this feature to make composite materials with excellent mechanical properties and damping properties be used in aerospace, precision instruments and other fields. Contents of the invention [0003] In order to solve the technical problem of poor damping performance of existing metal matrix composite mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C47/04C22C47/06C22C47/12
Inventor 刘刚张颖迟庆国樊超峰秦丰强董久锋李亮亮徐鸿鹏
Owner HARBIN UNIV OF SCI & TECH
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