强制流动热梯度化学气相渗透 (FCVI)作为一种制备碳基、陶瓷基复合材料的新工艺 ,克服了传统CVI中气体扩散传输与预制体渗透性的限制 ,可在短时间内制备出密度均匀、性能优良的制件。本文分析了在FCVI工艺过程中预制体温度与气体温度的区别 ,并从理论上推导出了FCVI中气体温度与预制体温度间的关系。 Forced Flow Thermal Gradient Chemical Vapor Infiltration (FCVI), as a new process for preparing carbon-based and ceramic matrix composites, overcomes the limitations of traditional CVI gas diffusion and transmission and preform permeability, and can be used to prepare uniform density in a short time , Excellent performance parts. This paper analyzes the difference between preform temperature and gas temperature during the FCVI process, and deduces the relationship between the gas temperature in FCVI and preform temperature theoretically.