无机材料学报2024，Vol.39Issue(8)：920-928,9.DOI:10.15541/jim20240002
管状C/SiC复合材料高温空气氧化行为与宏细观建模研究
Oxidation Behavior and Meso-macro Model of Tubular C/SiC Composites in High-temperature Environment
摘要
Abstract
Oxidation damage is one of the main factors affecting the life of C/SiC composite nozzle used in rocket engines.To accurately predict the oxidation damage of C/SiC composite nozzle,we explored the oxidation behavior of the tubular C/SiC composites which had a similar shape to nozzle.Evolution of their composition,structure,and mechanical properties was investigated at different temperatures ranging from 900 to 1300℃.The results showed that the tubular C/SiC composites exhibited diffusion-controlled oxidation characteristics under the high-temperature environment.Their mass and residual strength decreased as a power function with time,and decline rate was positively correlated with temperature.Moreover,based on the theory of oxidation kinetics and mass transfer,a macro-meso oxidation model was established to simulate the oxidation process of tubular C/SiC composites in high-temperature environment to timely predict the evolution of their mass and residual strength.Consequentely,all the predicted results of the model fitted well with the experimental data.Our investigation consolidate that this macro-meso oxidation model is powerfull to predict the oxidation behavior and the life-span of C/SiC composite nozzle.关键词
C/SiC复合材料/高温氧化/氧化模型/寿命预测Key words
C/SiC composite/high-temperature oxidation/oxidation model/life prediction分类
通用工业技术引用本文复制引用
全文心,余艺平,方冰,李伟,王松..管状C/SiC复合材料高温空气氧化行为与宏细观建模研究[J].无机材料学报,2024,39(8):920-928,9.基金项目
湖南省自然科学基金面上项目(2023JJ30634) （2023JJ30634）
国家重点实验室基金(6142907230202) Natural Science Foundation of Hunan Province(2023JJ30634) （6142907230202）
State Key Laboratory Program(6142907230202) （6142907230202）
