Preparation method of iron-clad aluminum type composite powder and product thereof

A technology of composite powder and aluminum type, which is applied in the direction of compressed gas generation, offensive equipment, explosives, etc., can solve the problems of difficult to control manufacturing costs, poor coating uniformity, complex processing equipment, etc., to solve incomplete combustion , easy quality control, low cost effect

Inactive Publication Date: 2013-04-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the defect of the electroplating method is that the processing equipment is relatively complicated, difficult to control, and the manufacturing cost is high; although the electroless plating method is relatively simple in process, because aluminum is an amphoteric metal, it is unstable in acidic or alkaline plating solutions, and it is easy to cause plating problems. The de

Method used

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  • Preparation method of iron-clad aluminum type composite powder and product thereof
  • Preparation method of iron-clad aluminum type composite powder and product thereof
  • Preparation method of iron-clad aluminum type composite powder and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 15g of aluminum powder with an average size of 29 microns to the fluidized bed and feed argon as a carrier gas, adjust the gas velocity of argon to 0.7L / min, thus perform the fluidization process of the aluminum powder, in this process In the process, the ratio between the height of the aluminum powder added to the fluidized bed and the diameter of the fluidized bed itself, that is, the height-to-diameter ratio, is controlled to be 3; then, continue to feed argon so that the air in the fluidized bed is exhausted, and then close Connect the fluidized bed with the outside air, and heat the fluidized bed to a temperature of 300°C; when the fluidized bed reaches 300°C, add 15ml of carbonyl iron into the bubbler and heat it to 100°C, so that Carbonyl iron volatilizes and is brought into the fluidized bed by argon gas for vapor phase deposition reaction, thereby producing iron-clad aluminum composite powder products in which iron is coated on the surface of micron aluminum...

Embodiment 2

[0043] Add 10g of aluminum powder with an average size of 7 microns in the fluidized bed and feed argon as a carrier gas, adjust the gas velocity of argon to 0.5L / min while stirring the aluminum powder, thereby performing the aluminum powder Fluidization process, in this process, the ratio between the height of the aluminum powder added to the fluidized bed and the diameter of the fluidized bed itself, that is, the height-to-diameter ratio is controlled to be 2.0; then, continue to feed argon to make the fluidized bed The air is exhausted, then the connection between the fluidized bed and the outside air is closed, and the fluidized bed is heated to a temperature of 320°C; when the fluidized bed reaches 320°C, 22ml of carbonyl iron is added to the bubbler And heated to 50°C, so that the carbonyl iron volatilizes and is brought into the fluidized bed by argon gas for vapor phase deposition reaction, thereby producing an iron-clad aluminum composite powder product in which iron i...

Embodiment 3

[0045] Add 8g of aluminum powder with an average size of 2 microns in the fluidized bed and pass into argon as a carrier gas, adjust the gas velocity of argon to 0.4L / min and perform a stirring operation on the aluminum powder, thereby performing the aluminum powder Fluidization process, in this process, the ratio between the height of the aluminum powder added to the fluidized bed and the diameter of the fluidized bed itself, that is, the height-to-diameter ratio is controlled to be 1.5; then, continue to feed argon to make the fluidized bed The air is exhausted, then the connection between the fluidized bed and the outside air is closed, and the fluidized bed is heated to a temperature of 280°C; when the fluidized bed reaches 280°C, 15ml of carbonyl iron is added to the bubbler And heated to 70°C, so that the carbonyl iron volatilizes and is brought into the fluidized bed by argon gas for vapor phase deposition reaction, thereby producing iron-clad aluminum composite powder p...

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Abstract

The invention discloses a preparation method of iron-clad aluminum type composite powder. The method comprises the following steps of: (a) adding micron aluminum powder to a fluidized bed and introducing a carrier gas, thereby performing a fluidization process of aluminum powder; (b) continuously introducing the carrier gas to empty air in the fluidized bed, and heating the fluidized bed so as to reach a predetermined temperature; and (c) adding carbonyl iron to a bubbler and heating to volatile carbonyl iron to be brought into the fluidized bed by the carrier gas to generate a vapor deposition reaction, thereby producing an iron-clad aluminum composite powder product. The invention further discloses the corresponding composite powder product and use of the composite powder product. Through the invention, the iron-clad aluminum type composite powder can be prepared without requiring a solvent, later separating and drying steps are saved, the prepared product has a uniform and dense coating layer, excellent thermal properties and good heat release concentration, and is especially applicable to the uses of the aspects in processing energetic materials, laser surface cladding and the like.

Description

technical field [0001] The invention belongs to the field of metal composite powder preparation, and more specifically relates to a method for preparing iron-clad aluminum composite powder and its products. Background technique [0002] Due to its high heat of combustion, ultra-fine aluminum powder is widely used in the field of energetic materials such as solid rocket propellants and high-energy explosives. However, micron-sized aluminum powder has slow combustion kinetics, long ignition delay, and incomplete combustion, so its potential high calorific value cannot be fully utilized. Studies have shown that the coating treatment of micron aluminum powder can effectively improve its combustion performance and increase the utilization rate of "effective aluminum". Among them, the improvement of thermal performance of micron aluminum powder coated with metal is particularly prominent. This is mainly because the metal-coated micron aluminum powder can prevent further oxidation...

Claims

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Application Information

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IPC IPC(8): C23C16/16C23C16/44B22F1/02C23C24/10C06B33/00C06D5/00
Inventor 胡木林陈志安王振业谢长生戚娜娜
Owner HUAZHONG UNIV OF SCI & TECH
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