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Process for manufacturing a part made of an ai/ai3b48c2 composite material

a composite material and manufacturing technology, applied in the field of composite material synthesis, can solve problems such as difficulty in obtaining compaction, and achieve the effect of limiting the wetting, adhesion and mechanical strength of the interface, and optimum strength of the interfa

Inactive Publication Date: 2018-07-26
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for forming a composite material using a graphite crucible. The method involves heating the crucible to a high temperature and then rapidly cooling it to a desired temperature. This process forms a matrix and reinforcement in the interface, which eliminates the need for oxide films and results in a stronger interface. The method is simple and can be used to produce dense ingots with specific geometries. The resulting composite material has lightweight, high hardness, and good thermal conductivity, making it useful in industries such as aerospace, automotive, and power electronics.

Problems solved by technology

It is preferred to use the powder in powdery form and to compress it in the cavity of the crucible, since, diboride AlB2 being not very ductile, it is difficult to obtain compaction.

Method used

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Embodiment Construction

[0037]The method that is the subject matter of the invention is based on a so-called reactive synthesis method. This is because the matrix and the reinforcement of the composite material are obtained in situ by a reaction between two precursors. The precursors chosen are aluminium diboride (AlB2) and graphite (C). AlB2 is in the form of a powder and is placed in a crucible that is made from graphite. Preferably, the same graphite element, preferably a graphite piston, is used for compacting the powder and for hermetically closing the cavity of the crucible. The whole is then raised to high temperature. The heating is carried out at a temperature higher than the decomposition temperature of AlB2, that is to say the temperature as from which there begins to be a liquid phase. In fact, at the decomposition temperature of AlB2, that is to say 960° C., two phases are obtained, a liquid phase and a solid phase.

[0038]Preferably, the heating is carried out at a temperature of between 1000° ...

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Abstract

A method for manufacturing a part made from an Al / Al3B48C2 composite material comprising an aluminium matrix in which particles of a mixed carbide of chemical formula Al3B48C2 are dispersed. The method comprises the following steps: a) placing a powder of chemical formula AlB2 in the cavity of a graphite crucible; b) closing the cavity by use of a graphite element; c) heating the crucible to a temperature of at least 960° C. and less than or equal to 1400° C. in order to obtain the formation of precipitates of the mixed carbide of chemical formula Al3B48C2 in liquid aluminium; d) cooling the crucible in order to solidify the liquid aluminium; e) removing the crucible; thereby the part made from Al / Al3B48C2 composite material is obtained.

Description

TECHNICAL FIELD[0001]The present invention relates to the field of the synthesis of composite materials having a metal matrix and ceramic particulate reinforcements.[0002]In particular, the invention relates to a method for producing a composite material having an aluminium matrix in which Al3B48C2 reinforcements are dispersed.[0003]This method may in particular find an application in the aeronautical and automobile fields.STATE OF PRIOR ART[0004]In the automobile and aeronautical field, manufacturers seek to obtain lightweight strong materials. However, the majority of lightweight materials that can be used industrially are not very strong.[0005]This is the reason why materials with a metal matrix (CMMs), which comprise a metallic matrix (metal or metallic alloy) in which metallic or ceramic reinforcements (particles, fibres or the like) are incorporated, are particularly appreciated. This is because the advantage of CMMs compared with light alloys (based on aluminium, magnesium or...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C22C1/10C22C32/00C22C29/06
CPCC22C1/1036C22C32/0057C22C29/062C22C2001/1047C22C1/1047
Inventor DEZELLUS, OLIVIERCHAFFRON, LAURENTANDRIEUX, JEROMESAMER, NASSIMGARDIOLA, BRUNO
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES