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Method for synergistically improving performance of C/SiC composite material by adding multiple rare earth oxides
A method for synergistically improving the performance of a C/SiC composite material by adding multiple rare earth oxides comprises the following steps: adding cerium oxide, SiC fine powder, lanthanum oxide fine powder and butyronitrile modified phenolic resin into absolute ethyl alcohol and acetone, uniformly stirring for fully dissolving, and then adding hexamethylenetetramine to obtain dipping slurry; t300 type carbon fibers are soaked in the soaking slurry, wound and air-dried, the T300 type carbon fibers are cut into square shapes, and the T300 type carbon fibers are stacked layer by layer and subjected to mold pressing to form the carbon fiber reinforced phenolic resin composite material; carrying out high-temperature pyrolysis on the carbon fiber reinforced phenolic resin composite material through inert gas; and performing high-temperature vacuum capillary Si infiltration treatment through an RMI process to obtain the carbon fiber reinforced ceramic matrix composite material. According to the method, when Si is infiltrated in the RMI process, rare earth lanthanum oxide fine powder plays a role in infiltrating catalysis, rare earth cerium oxide fine powder is added into the dipping slurry, the density of a finished product is improved, the porosity is reduced, the flow stress of the material is improved, and the high-temperature-resistant strength and the heat dissipation rate of the composite material are enhanced.
一种添加多种稀土氧化物协同改善C/SiC复合材料性能的方法，它包括以下步骤，在无水乙醇和丙酮中加入氧化铈、SiC细粉、氧化镧细粉和丁腈改性酚醛树脂，搅拌均匀充分溶解，再加入六次甲基四胺，即为浸渍料浆；将T300型碳纤维通过浸渍料浆浸渍、缠绕后，晾干，将其裁剪为方形，并层层叠加到一起模压成为碳纤维增强酚醛树脂复合材料；上述的碳纤维增强酚醛树脂复合材料，经过惰性气体高温热解；再通过RMI工艺，经高温真空毛细管渗Si处理，得到碳纤维增强陶瓷基复合材料。本发明的方法在RMI工艺中渗Si时，稀土氧化镧细粉起到催渗作用，浸渍料浆添加稀土氧化铈细粉提高成品致密度减小孔隙率，提高材料的流变应力，强化了复合材料的耐高温强度和散热率。
Method for synergistically improving performance of C/SiC composite material by adding multiple rare earth oxides
A method for synergistically improving the performance of a C/SiC composite material by adding multiple rare earth oxides comprises the following steps: adding cerium oxide, SiC fine powder, lanthanum oxide fine powder and butyronitrile modified phenolic resin into absolute ethyl alcohol and acetone, uniformly stirring for fully dissolving, and then adding hexamethylenetetramine to obtain dipping slurry; t300 type carbon fibers are soaked in the soaking slurry, wound and air-dried, the T300 type carbon fibers are cut into square shapes, and the T300 type carbon fibers are stacked layer by layer and subjected to mold pressing to form the carbon fiber reinforced phenolic resin composite material; carrying out high-temperature pyrolysis on the carbon fiber reinforced phenolic resin composite material through inert gas; and performing high-temperature vacuum capillary Si infiltration treatment through an RMI process to obtain the carbon fiber reinforced ceramic matrix composite material. According to the method, when Si is infiltrated in the RMI process, rare earth lanthanum oxide fine powder plays a role in infiltrating catalysis, rare earth cerium oxide fine powder is added into the dipping slurry, the density of a finished product is improved, the porosity is reduced, the flow stress of the material is improved, and the high-temperature-resistant strength and the heat dissipation rate of the composite material are enhanced.
一种添加多种稀土氧化物协同改善C/SiC复合材料性能的方法，它包括以下步骤，在无水乙醇和丙酮中加入氧化铈、SiC细粉、氧化镧细粉和丁腈改性酚醛树脂，搅拌均匀充分溶解，再加入六次甲基四胺，即为浸渍料浆；将T300型碳纤维通过浸渍料浆浸渍、缠绕后，晾干，将其裁剪为方形，并层层叠加到一起模压成为碳纤维增强酚醛树脂复合材料；上述的碳纤维增强酚醛树脂复合材料，经过惰性气体高温热解；再通过RMI工艺，经高温真空毛细管渗Si处理，得到碳纤维增强陶瓷基复合材料。本发明的方法在RMI工艺中渗Si时，稀土氧化镧细粉起到催渗作用，浸渍料浆添加稀土氧化铈细粉提高成品致密度减小孔隙率，提高材料的流变应力，强化了复合材料的耐高温强度和散热率。
Method for synergistically improving performance of C/SiC composite material by adding multiple rare earth oxides
一种添加多种稀土氧化物协同改善C/SiC复合材料性能的方法
LIU ZHIGANG (Autor:in) / ZHAO YUNCAI (Autor:in) / WANG XIN (Autor:in)
03.12.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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