Method for producing a powder including carbon, silicon and boron

A powder, silicon carbide technology, applied in nanotechnology for materials and surface science, chemical instruments and methods, silicon carbide, etc., can solve problems such as high cost

Active Publication Date: 2012-04-11
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This synthesis, in particular, utilizes the costly unstable gas diborane B 2 h 6 disadvantages, and for this reason it is difficult to use for the production of powders with a higher boron content than the above

Method used

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  • Method for producing a powder including carbon, silicon and boron
  • Method for producing a powder including carbon, silicon and boron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0064] This example illustrates the preparation of a powder comprising both silicon carbide and boron carbide phases by laser pyrolysis, at figure 1 in Reactor 1 shown in , which contains the following elements:

[0065] - an injection chamber into which the precursors are injected before being subjected to laser pyrolysis and then mixed, said chamber consisting of a heated mixing chamber 5, an injection rod 7 connected to the upper part of the chamber, two rods connected to the sides of the chamber injection rods 9, 11 so that the mixture is injected into the injection nozzle 13 within the pyrolysis chamber; a confinement flue 15 arranged around the injection nozzle;

[0066] - a pyrolysis chamber 17, in which a laser beam 19 is emitted from a laser emitting device 21, which will interact with the precursor mixture to form the above-mentioned powder.

[0067] The confinement lip firstly allows the powder produced to be contained in a laminar flow, and secondly it prevents an...

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Abstract

The invention relates to a method for producing a powder including carbon, silicon and boron, the silicon being in the form of silicon carbide and the boron being in the form of boron carbide and / or free boron, including the following steps: a step of placing in contact a carbon-based precursor, a silicon-based precursor and a boron-based precursor BX3, where X is a halogen atom, such as to obtain a mix of said three precursors; a step of subjecting the resulting mixture to laser pyrolysis, the boron-based precursor BX3 being heated, prior to the step of placing in contact and / or simultaneously with the step of placing in contact, to a temperature higher than the condensation temperature of said precursor.

Description

technical field [0001] The invention relates to a method for producing a powder comprising carbon, silicon and boron, the silicon being present in the form of silicon carbide and the boron being in the form of boron carbide and / or boron alone. [0002] Said powders, especially because they contain boron, such as powders containing at least 5% by weight of boron, are easily sintered powders and thus lend themselves to the design of components consolidated from said powders. [0003] Thus, the powders obtained with the method of the invention can be used in the design of components obtained by sintering. [0004] The powders obtained with the method of the invention can also be used in the design of self-healing matrices, especially when they have a boron content of more than 5% by weight. The self-healing phase of the matrix requires as high a contact surface with oxygen as possible. Because of the surface / volume ratio, the reactivity associated with oxygen is thus increased ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/36C04B35/563C04B35/565
CPCC04B2235/5454C04B35/563C04B2235/5409C04B2235/3826C01B31/36C04B2235/3821C04B2235/3834C04B35/6267C04B35/565C04B2235/421B82Y30/00C01B32/956C01B32/991C01B32/963B01J6/008B01J19/121C01P2004/80C01P2004/64
Inventor 希卡姆·马斯可罗特伯努瓦·吉扎尔弗朗索瓦·特内格
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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