高温氧化及颗粒冲蚀对C/C-SiC复合材料使用性能的影响  

Effect of high temperature oxidation and particle erosion on the performance of C/C-SiC composites materials

作　　者：王玲玲[1] 王坤杰[1,2] 张小龙 闫联生 姚熹[1] WANG Lingling;WANG Kunjie;ZHANG Xiaolong;YAN Liansheng;YAO Xi(Xi’an Aerospace Composites Research Institute,Xi’an 710025,China;National and Local Union Engineering Research Center of High-performance Carbon Fiber Manufacture and Application,Xi’an 710089,China;The Eighth Military Representative Office of the Air Force Equipment Department in Xi’an District,Xi’an 710000,China)

机构地区：[1]西安航天复合材料研究所,西安710025 [2]高性能碳纤维制造及应用国家地方联合工程研究中心,西安710089 [3]空军装备部驻西安地区第八军事代表室,西安710000

出　　处：《航空材料学报》2022年第4期75-82,共8页Journal of Aeronautical Materials

基　　金：国家自然科学基金项目(21676163)。

摘　　要：采用3K斜纹碳布和12K无纬布铺层的针刺预制体,经化学气相渗透法(CVI)及先驱体浸渍裂解法(PIP)最终成型C/C-SiC复合材料,采用长时间氧乙炔烧蚀实验及高速颗粒冲蚀实验进行复合材料长时间抗氧化及抗冲刷性能测试,研究影响其抗烧蚀(冲蚀)行为的主要因素。结果表明:经过600 s氧乙炔烧蚀后,C/C-SiC复合材料发生一定程度的烧蚀,采用无纬布预制体较采用斜纹碳布预制体成型的C/C-SiC复合材料的线烧蚀率、质量烧蚀率、烧蚀深度低;两种材料颗粒冲蚀实验结果一致,试样冲刷面呈现明显的机械冲刷的特征,在短短的10 s内,冲刷坑深度能达到7.21~7.25 mm,材料失效严重;而没有颗粒气流冲刷实验时,材料冲蚀程度显著下降。C/C-SiC复合材料在实际使用过程中一般受到气流压力、粒子冲击及高温氧化的综合作用,粒子冲击引起的机械剥蚀比长时间高温氧化产生的热化学烧蚀对C/C-SiC复合材料的失效影响更大,直接影响材料的使用性能。C/C-SiC composites was prepared by“chemical vapor infiltration+precursor impregnation pyrolysis”(CVI+PIP)combined process by needle preform laying separately with 3K twilled carbon cloth and 12K non-latitude cloth.The long-term oxidation resistance and erosion resistance test of composites were realized by using long-term oxyacetylene ablation test and high-temperature particle erosion test,and the main factors affecting their anti-ablation benavior were studied.The results show that the C/C-SiC composites have certain degree of ablation occurred after 600 s acetylene ablation,the linear ablation rates,mass ablation rates and ablation depth of the material formed by the preform of the non-latitude cloth are lower than that of the material prefabricated with the twilled carbon cloth.Using particles erosion test,the results of the two materials are consistent and the specimen flushing surface presents obvious characteristics of mechanical flushing the the depth of the flushing pit can be reached 7.21-7.25 mm after just 10 seconds.While without the particle airflow flushing test,the degree of material erosion decreased significantly.C/C-SiC composites in the actual use of the process is generally subject to air flow pressure,particle impact and high temperature oxidation of the combined effect,among them the mechanical ablation caused by particle impact has a greater impact on the failure of C/C-SiC composites than thermo-chemical ablation caused by long-term high temperature oxidation,which directly affects the performance of the material.

关 键 词：针刺C/C-SiC 烧蚀 颗粒冲蚀 高温氧化 失效机理 

分 类 号：TB332[一般工业技术—材料科学与工程]