发明授权
- 专利标题： Chemical vapor infiltration process of a pyrocarbon matrix within a porous substrate with creation of a temperature gradient in the substrate
- 专利标题（中）： 在多孔基材内的热解碳基质的化学气相渗透过程，在基质中产生温度梯度
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申请号： US632487申请日： 1996-04-25
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公开(公告)号： US5789026A公开(公告)日： 1998-08-04
- 发明人: Bernard Delperier , Jean-Luc Domblides
- 申请人： Bernard Delperier , Jean-Luc Domblides
- 申请人地址： FRX Suresnes
- 专利权人： Societe Europeene de Propulsion
- 当前专利权人： Societe Europeene de Propulsion
- 当前专利权人地址： FRX Suresnes
- 优先权： FRX93/12806 19931027
- 主分类号： C04B35/80
- IPC分类号： C04B35/80 ; C04B35/83 ; C04B35/84 ; C23C16/26
摘要：
The substrate (10) is placed in an enclosure (12) and is heated so as to establish a temperature gradient within the substrate such that the substrate has a temperature in its portions remote from its exposed surfaces that is greater than its temperature at said surfaces. A gas constituting a precursor of carbon and comprising at least one saturated or unsaturated hydrocarbon is admitted into the enclosure, with the formation of pyrolytic carbon be favored in the higher temperature portions of the substrate. The gas comprises a mixture containing at least one saturated or unsaturated hydrocarbon and hydrogen, and the substrate is heated in such a manner as to establish a temperature gradient within the substrate on either side of a temperature of 1500 K, with hydrogen having an inhibiting role at temperatures below 1500 K.