航空材料学报2026，Vol.46Issue(9)：97-106,10.DOI:10.11868/j.issn.1005-5053.2026.000073
先驱体转化法制备SiC/TiC复合陶瓷及其1600℃氧丙烷烧蚀行为
Preparation of SiC/TiC composite ceramics by precursor conversion method and their oxy-propane ablation behavior at 1600℃
摘要
Abstract
To address the issues of volatile oxide scale and insufficient oxidation/ablation resistance of monolithic SiC ceramics in extreme environments,this study employs polysiloxane as a ceramic precursor and titanium acetylacetonate(TiO(acac)2)as a modifier.SiC/TiC composite ceramics are prepared via a precursor conversion method combined with spark plasma sintering.The cross-linking and curing mechanism of the precursor,as well as the high-temperature pyrolysis behavior,are systematically investigated,and the influence mechanism of Ti doping on the oxidation/ablation resistance of the composite ceramics is elucidated.The results show that Ti promotes precursor cross-linking through the formation of Si―O―Ti bonds,achieving a ceramic yield as high as 79.18%.When the TiO(acac)2 mass content reaches 20%,the TiC mass content in the composite increases to 19%,and the densification of the sintered ceramic is significantly improved.Oxy-propane ablation tests at 1600℃demonstrate that the 20%modified sample exhibits greatly enhanced ablation resistance,with linear and mass ablation rates of 0.017 μm/s and-0.140 mg/s,respectively.This superior ablation resistance is attributed to the formation of a continuous composite oxide layer consisting of TiO2 and SiO2,which suppresses the volatilization of SiO2 and further oxygen diffusion.关键词
先驱体转化法/放电等离子烧结/SiC/TiC复合陶瓷/氧丙烷烧蚀Key words
polymer-derived ceramics/spark plasma sintering/SiC/TiC composite ceramics/oxy-propane ablation分类
航空航天引用本文复制引用
曹永博,张雨雷,胡心怡,付艳芹,李贺军..先驱体转化法制备SiC/TiC复合陶瓷及其1600℃氧丙烷烧蚀行为[J].航空材料学报,2026,46(9):97-106,10.基金项目
国家重点研发计划(2021YFA0715803) （2021YFA0715803）
国家自然科学基金(52402113,52293373) （52402113,52293373）
河南省科技研发计划联合基金(235200810072) （235200810072）
