Chemical vapor infiltration with microwave heating
Chemical vapor infiltration with microwave heating
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微波加热化学气相渗透
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
B. Espinoza
中科院分区：
文献类型：
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作者：
D. Devlin;R. Currier;R. Barbero;B. Espinoza
描述了在化学气相渗透 (CVI) 过程中使用微波能量加热基材。数值预测和实验观察到的热分布表明，在受到微波辐射的纤维预制件中可以建立陡峭的反向热梯度。当与 CVI 技术相结合时，可以利用反向梯度来促进由内而外的致密化。描述了最近的微波辅助 CVI 结果，重点是硅基基质材料。重点是纤维和基体消散微波能量的相对能力所起的作用。讨论了进一步工艺开发的核心问题，例如界面涂层对后续微波加工的影响。
The use of microwave energy to heat substrates during chemical vapor infiltration (CVI) is described. Both numerical predictions and experimentally observed thermal profiles indicate that steep inverted thermal gradients can be established in fibrous preforms subjected to microwave radiation. When combined with the CVI technique, the inverted gradients can be exploited to promote inside-out densification. Recent microwave assisted CVI results, which focus on silicon based matrix materials, are described. Emphasis is placed on the role played by the relative ability of fiber and matrix to dissipate microwave energy. Issues central to further process development, such as the effect of interfacial coating on subsequent microwave processing, are discussed.