Simultaneous Carbonization and Ceramic Coating of Carbon Fibers

碳纤维同时碳化和陶瓷涂层

• 批准号: 05555203
• 负责人: KUSAKABE Katsuki
• 金额: $ 2.88万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555203/
• 关键词: Carbon Fiber; Carbonization; Coating; Ceramic; Silicon Carbide; Titanium Nitride; Thin Film; Composite Materials; シリカ; 気相合成; 不融化; 耐酸化性

Silica film was deposited on carbon fiber precursors (CFPs) by oxidation of tetraethylorthosilicate (TEOS) in a low-temperature plasma CVD reactor. When the contact between CFPs and plasma gas was assured, the surface of CFPs was covered with thin silica film homogeneously. Then the CFPs were carbonized at 1000ﾟC in argon atmosphere and silica coated carbon fibers were formed. By the subsequent heat treatment at 1500ﾟC,silica film was reduced to silicon carbide film by carbothermal reaction. However, the tensile strength of the fibers obtained was decreased after the reaction.Carbon fibers were then directly coated with SiC film by thermally-activated CVD in hydrogen using triisopropylsilane. The film morphology was strongly affected by reaction conditions. The tensile strength of fibers was decreased in the early stage of the coating reaction. SiC films protected the fibers from the oxidation and obstructed the diffusion of surrounding molten aluminum into fibers at 1000ﾟC.Carbon fibers were also coated with polycarbosilane which was cured at 200ﾟC and pyrolyzed at 800-1000ﾟC.Amorphous SiC films were successfully formed on the carbon fibers. These coating methods demonstrated the possibility for simultaneous processing of carbonization and ceramic coating of CFPs.

在低温等离子体化学气相沉积（CVD）反应器中，采用正硅酸乙酯（TEOS）氧化法在碳纤维原丝（CFPs）上沉积二氧化硅薄膜。当CFPs与等离子体气体接触良好时，CFPs表面均匀覆盖一层SiO2薄膜。然后将CFP在氩气气氛中在1000 ℃下煅烧，形成二氧化硅涂覆的碳纤维。通过随后在1500 ℃下的热处理，二氧化硅膜通过碳热反应被还原成碳化硅膜。采用三异丙基硅烷在氢气气氛中热活化CVD法，在碳纤维表面直接涂覆SiC薄膜。反应条件对薄膜形貌有很大影响。纤维的拉伸强度在包覆反应的早期阶段有所下降。在1000 ℃下，SiC薄膜保护了纤维免受氧化，并阻止了周围熔融铝向纤维中的扩散。在碳纤维上也涂覆了聚碳硅烷，该聚碳硅烷在200 ℃下固化并在800-1000 ℃下热解。这些涂层方法证明了同时处理碳纤维复合材料的碳化和陶瓷涂层的可能性。

项目成果

K. Tsugeki: "Silica Coating of Almina Nitrid Particles by R-F Plasea Chemical Depusiton" J.Mat.Sui.Lett. 13. 43-45 (1994)

K. Tsugeki：“R-F Plasea Chemical Depusiton 的 Almina 氮化物颗粒的二氧化硅涂层”J.Mat.Sui.Lett。

T.Kato: "Effect of Carbon Source on Formation of Vapor-Grown Carbon Fiber" Carbon. 31. 937-940 (1993)

T.Kato：“碳源对气相生长碳纤维形成的影响”碳。

T. Kato: "Effect of Carbon Source on Formation of Vapon-Grour Carbon Fiber" Carbon. 31. 937-940 (1993)

T. Kato：“碳源对气相碳纤维形成的影响” 碳。

K. Tsugeki: "Silica coatig of Alminium Nitride Particles by R-F plasma chemical Vapovr Deposition" J. Mat. Sci. Lett. 13. 43-45 (1994)

K. Tsugeki：“通过射频等离子体化学气相沉积对氮化铝颗粒进行二氧化硅涂层”J. Mat。

T. Kato: "Effect of Sulphur on Formation of Vapour-Grown Carbon Fibre" J. Mat. Sci. Lett.13. 3-377 (1994)

T. Kato：“硫对气相生长碳纤维形成的影响”J. Mat。