Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR TREATING SILICON CARBIDE FIBRES
The invention relates to a method for treating at least one silicon carbide fibre (10), said method comprising at least the following steps: a) formation of a silica layer (22) on the surface of a silicon carbide fibre, having an oxygen content lower than or equal to 1 atomic percent, the silica layer being formed by bringing said fibre into contact with an oxidising medium having a temperature higher than or equal to 50 DEG C and a pressure higher than or equal to 1MPa, and step a) being such that the treated fibre has a surface layer predominantly consisting of carbon and during step a) thesurface carbon is removed by oxidation and the silicon carbide is oxidised in order to form the silica layer, or the treated fibre has a surface layer comprising a silicon oxycarbide and during step a) the oxycarbide is oxidised in order to form the silica layer, and b) removal of the silica layer formed, by hydrothermal treatment of the fibre obtained after carrying out step a), in which the fibre is treated with water at a pressure between the saturated vapour pressure and 30 MPa and at a temperature lower than or equal to 400 DEG C.
本发明涉及一种处理至少一种碳化硅纤维(10)的方法，该方法至少包括以下步骤：a)在氧含量小于或等于1原子％的碳化硅纤维的表面上形成二氧化硅层(22)，所述二氧化硅层是通过使该纤维与温度高于或等于50℃且压力大于或等于1MPa的氧化介质接触而形成的，并且步骤a)使得经过处理的纤维具有主要由碳形成的表面层，在步骤a)中通过氧化除去表面碳，并进行碳化硅的氧化以形成二氧化硅层，或者经过处理的纤维具有包含碳氧化硅的表面层，在步骤a)中进行碳氧化物的氧化，以形成二氧化硅层,和b)通过对实施步骤a)后得到的纤维进行水热处理来除去形成的二氧化硅层，其中在饱和蒸气压和30MPa之间的压力下并且在低于或等于400℃的温度下用水对纤维进行处理。
METHOD FOR TREATING SILICON CARBIDE FIBRES
The invention relates to a method for treating at least one silicon carbide fibre (10), said method comprising at least the following steps: a) formation of a silica layer (22) on the surface of a silicon carbide fibre, having an oxygen content lower than or equal to 1 atomic percent, the silica layer being formed by bringing said fibre into contact with an oxidising medium having a temperature higher than or equal to 50 DEG C and a pressure higher than or equal to 1MPa, and step a) being such that the treated fibre has a surface layer predominantly consisting of carbon and during step a) thesurface carbon is removed by oxidation and the silicon carbide is oxidised in order to form the silica layer, or the treated fibre has a surface layer comprising a silicon oxycarbide and during step a) the oxycarbide is oxidised in order to form the silica layer, and b) removal of the silica layer formed, by hydrothermal treatment of the fibre obtained after carrying out step a), in which the fibre is treated with water at a pressure between the saturated vapour pressure and 30 MPa and at a temperature lower than or equal to 400 DEG C.
本发明涉及一种处理至少一种碳化硅纤维(10)的方法，该方法至少包括以下步骤：a)在氧含量小于或等于1原子％的碳化硅纤维的表面上形成二氧化硅层(22)，所述二氧化硅层是通过使该纤维与温度高于或等于50℃且压力大于或等于1MPa的氧化介质接触而形成的，并且步骤a)使得经过处理的纤维具有主要由碳形成的表面层，在步骤a)中通过氧化除去表面碳，并进行碳化硅的氧化以形成二氧化硅层，或者经过处理的纤维具有包含碳氧化硅的表面层，在步骤a)中进行碳氧化物的氧化，以形成二氧化硅层,和b)通过对实施步骤a)后得到的纤维进行水热处理来除去形成的二氧化硅层，其中在饱和蒸气压和30MPa之间的压力下并且在低于或等于400℃的温度下用水对纤维进行处理。
METHOD FOR TREATING SILICON CARBIDE FIBRES
处理碳化硅纤维的方法
LOISON SYLVIE (Autor:in) / HENRY LUCILE (Autor:in) / AYMONIER CYRIL (Autor:in) / HUGUET CHRYSTEL (Autor:in)
04.09.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
METHOD OF MAKING CERAMICS BASED ON SILICON CARBIDE, REINFORCED WITH SILICON CARBIDE FIBRES
| Europäisches Patentamt | 2020