Response mechanism study of alternate ZrC-10vol.%SiC/ZrC-70vol.%SiC coatings with various sublayer thicknesses for cyclic and long-term thermal exposure
作者机构：State Key Laboratory of Solidification ProcessingShaanxi Key Laboratory of Fiber Reinforced Light Composite MaterialsNorthwestern Polytechnical UniversityXi’an 710072China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第140卷第9期
页 面：153-162页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：supported by the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical Univer-sity(No.CX2021006) the National Natural Science Foundation of China(Nos.91860203,51727804 and 52130205) the Fundamental Research Funds for the Central Universities(No.3102019TS0409) the Creative Research Foundation of Science and Technology on Thermo-structural Composite Materials Laboratory
主 题：Alternate coating Sublayer numbers Carbon/carbon composites High-temperature test Plasma spraying
摘 要：To explore the influence of sublayer numbers on the structure evolution and thermal stress level,an alternate coating consisting of ZrC-10 vol.%SiC and ZrC-70 vol.%SiC sublayers was designed in this *** a basically consistent general thickness,three coatings constituted by 2,4 and 6 sublayers were prepared by plasma spraying,which then were assessed using an oxyacetylene torch under cyclic and long-term *** coating with 6 sublayers was supposed to be the one with the best ablation property,finite element analysis also evidenced its least thermal stress among all these *** being ablated for 240 s,the linear and mass ablation rates of the coating with 6 sublayers decreased by 51.27%and 14.41%as compared to that with 4 ***-test analysis proved the existence of Si-based products,which help the outmost surface to develop a dense ***,the yielded alternate dense/porous scale had a preferable toughness,allowing it to maintain a good integrity.
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