CAJ | 학술논문

　　为提高硅基涂层的高温抗氧化性能，采用包埋法在炭/炭(C/C)复合材料表面制备ZrB2改性硅基涂层，研究涂层的相组成、微观形貌及其在1773、1873和1953 K时的抗氧化性能。所制备的涂层结构致密，具有良好的抗氧化性能。在1773 K下形成的稳定的ZrSiO4–SiO2氧化保护膜对C/C复合材料提供550 h的氧化保护。涂层试样的抗氧化性能随温度的提高而降低，在1953 K下氧化50 h其质量损失为2.44%，这主要归因于ZrSiO4的高温分解和SiO2保护膜随温度升高的挥发。
　　위제고규기도층적고온항양화성능，채용포매법재탄/탄(C/C)복합재료표면제비ZrB2개성규기도층，연구도층적상조성、미관형모급기재1773、1873화1953 K시적항양화성능。소제비적도층결구치밀，구유량호적항양화성능。재1773 K하형성적은정적ZrSiO4–SiO2양화보호막대C/C복합재료제공550 h적양화보호。도층시양적항양화성능수온도적제고이강저，재1953 K하양화50 h기질량손실위2.44%，저주요귀인우ZrSiO4적고온분해화SiO2보호막수온도승고적휘발。
To improve the anti-oxidation ability of silicon-based coating for carbon/carbon (C/C) composites at high temperatures, a ZrB2 modified silicon-based multilayer oxidation protective coating was prepared by pack cementation. The phase composition, microstructure and oxidation resistance at 1773, 1873 and 1953 K in air were investigated. The prepared coating exhibits dense structure and good oxidation protective ability. Due to the formation of stable ZrSiO4?SiO2 compound, the coating can effectively protect C/C composites from oxidation at 1773 K for more than 550 h. The anti-oxidation performance decreases with the increase of oxidation temperature. The mass loss of coated sample is 2.44% after oxidation at 1953 K for 50 h, which is attributed to the decomposition of ZrSiO4 and the volatilization of SiO2 protection layer.