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Method for preparing self-lubricating radiation-proof Al-Bi alloy

An anti-radiation and self-lubricating technology, applied in the field of preparation of Al-Bi alloys, can solve the problems of composition segregation of immiscible alloys, high sintering temperature, complicated process, etc., to reduce the sintering temperature, solve the composition segregation, and the process is simple and fast. Effect

Inactive Publication Date: 2012-04-25
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method for preparing self-lubricating anti-radiation Al-Bi alloy by ball milling to solve the problems of segregation of components, high sintering temperature, high cost and complex process of existing immiscible alloys.

Method used

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  • Method for preparing self-lubricating radiation-proof Al-Bi alloy

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specific Embodiment approach 1

[0008] Specific embodiment one: the preparation method of the self-lubricating anti-radiation Al-Bi alloy of the present embodiment is carried out according to the following steps: one, take bismuth powder and put into the ball mill jar containing dehydrated alcohol, be 10 according to ball-to-material ratio: Alumina ceramic balls are added at 1-30:1, the ball milling time is 30 minutes-30 hours, the ball milling temperature is room temperature, the ball mill speed is 200-350 rpm, and the bismuth powder is ground to a size of 50nm-1μm. 2. Weigh the aluminum powder according to the mass ratio Al: Bi=100:1-1:1 and put it into the ball mill jar containing bismuth in step 1. According to the ball-to-material ratio of 10:1-40:1, the ball milling time is 1 Hours to 30 hours, the temperature of the ball mill is room temperature, and the speed of the ball mill is 200-350 rpm. 3. Evaporate the absolute ethanol in the ball-milled powder and pour it into a graphite mold. 4. Prepare the ...

specific Embodiment approach 2

[0009] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, the ball-to-material ratio is 10:1-30:1, the ball milling time is 5 hours-25 hours, the size of bismuth powder is ground to 100nm-800nm, Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment differs from Embodiment 1 in that: in step 1, the ball-to-material ratio is 20:1, the ball milling time is 15 hours, and the size of bismuth powder is ground to 500nm. Others are the same as Embodiment 1.

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Abstract

The invention relates to a method for preparing self-lubricating radiation-proof Al-Bi alloy, and aims to solve the problems of composition segregation, high sintering temperature, high cost, complicated process and the like of the conventional aluminium-bismuth alloy. The method for preparing the self-lubricating radiation-proof Al-Bi alloy comprises the following steps of: 1, performing ball milling on bismuth powder into certain size; 2, adding aluminium powder into the bismuth powder for ball milling; 3, evaporating absolute ethanol in the powder; and 4, performing hot pressed sintering to prepare the material.

Description

Technical field: [0001] The invention relates to a preparation method of Al-Bi alloy. technical background [0002] Immiscible alloys are a class of materials with good physical and mechanical properties, and have broad application prospects in the fields of machinery, automobiles, aviation, and electronics. However, the density difference between the two phases in this type of alloy is usually large, often resulting in serious gravity segregation, which limits the development and application of this type of alloy. For Al-Bi alloy, when the content of bismuth is a few percent, it can be used as a bearing material for self-lubricating bearings, and it is a new type of automotive bearing material that is being developed in various countries. When the content of bismuth is high, because the bismuth atom absorbs X-rays close to lead, it also has a certain macroscopic absorption capacity for thermal neutrons. It is the replacement product of the traditional protective material l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/04
Inventor 胡津刘刚柳超
Owner HARBIN INST OF TECH
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