管状C/SiC复合材料高温空气氧化行为与宏细观建模研究

doi:10.15541/jim20240002

无机材料学报

管状C/SiC复合材料高温空气氧化行为与宏细观建模研究

全文心, 余艺平, 方冰, 李伟, 王松

国防科技大学空天科学学院新型陶瓷纤维及其复合材料重点实验室,长沙 410073

收稿日期:2024-01-02 修回日期:2024-03-13 出版日期:2024-03-30 网络出版日期:2024-03-30
作者简介:全文心（2000-）,男,硕士研究生. E-mail: quanwenxin18@nudt.edu.cn.
基金资助:
湖南省自然科学基金面上项目(2023JJ30634); 国家重点实验室基金项目(6142907230202)

Oxidation Behavior and Meso-macro Model of Tubular C/SiC Composites in High-temperature Environment

QUAN Wenxin, YU Yiping, FANG Bing, LI Wei, WANG Song

Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

Received:2024-01-02 Revised:2024-03-13 Published:2024-03-30 Online:2024-03-30
About author:QUAN Wenxin (2000-), male, Master candidate. E-mail: quanwenxin18@nudt.edu.cn
Supported by:
Natural Science Foundation of Hunan Province, China (2023JJ30634); The State Key Laboratory Program (6142907230202)

摘要/Abstract

摘要： 氧化损伤是影响火箭发动机用C/SiC复合材料喷管寿命的主要因素之一。为准确评估C/SiC复合材料喷管的氧化损伤,本研究以近似喷管结构的管状C/SiC复合材料为实验对象,研究了管状C/SiC复合材料在高温（900~1300 ℃）空气环境下的氧化行为,包括其组成、结构及力学性能的演变规律,发现管状C/SiC复合材料在该高温空气环境下表现出受扩散控制的氧化特征,质量与剩余强度随时间呈幂函数趋势下降,下降速率与温度正相关。在此基础上,我们从氧化动力学与传质学理论角度,建立了管状C/SiC复合材料细观-宏观尺度氧化模型,对管状C/SiC复合材料高温空气氧化过程作了模拟,并对材料的质量与剩余强度作了预测,模型预测结果与实验数据拟合程度较高,可为C/SiC复合材料喷管的寿命评估提供参考。

关键词: C/SiC复合材料, 高温氧化, 氧化模型, 寿命预测

Abstract: Oxidation damage is one of the main factors affecting the life of C/SiC composites nozzle used in rocket engines. To accurately predict the oxidation damage of C/SiC composites nozzle, we explored the oxidation behavior of these 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. Consequntely, all the predicted results of the model fited well with the experimental data. Our investigation consolidated that this macro-meso oxidation model is powerfull to predict the oxidation behavior and the life-span of C/SiC composite nozzle.

Key words: C/SiC composites, high-temperature air oxidation, meso-macro oxidation model, life prediction

中图分类号:

TB332

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, DOI: 10.15541/jim20240002.

QUAN Wenxin, YU Yiping, FANG Bing, LI Wei, WANG Song. Oxidation Behavior and Meso-macro Model of Tubular C/SiC Composites in High-temperature Environment[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20240002.

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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

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