无机材料学报2023，Vol.38Issue(11)：1271-1280,10.DOI:10.15541/jim20230143
聚碳硅烷基复合涂层PCS裂解行为及其抗激光烧蚀性能
Pyrolysis Behavior and Laser Ablation Resistance of PCS in Polycarbosilane Composite Coatings
摘要
Abstract
For the development of high-performance laser protective coatings,this work innovatively proposes the idea of recombining PCS ablative coatings on the surface of traditional yttrium stabilized zirconia(YSZ)thermal insulation coatings.Based on characteristics of the consumption of large amount laser energy through decomposition of polycarbosilane(PCS)and production of high-temperature ceramic protective phases,NiCrAlY/YSZ/PCS-TiO2(YPT)and NiCrAlY/YSZ/PCS-Y2O3(YPY)coatings were prepared on the surface of Ni-based alloy by slurry method combined with atmospheric plasma spraying(APS).Based on the effect of TiO2 and Y2O3 addition on the pyrolysis behavior of PCS,the laser ablation resistance of YPT and YPY composite coatings on 10.6 μm CO2 laser were systematically studied and compared with that of single layer YSZ coating.The results show that YPY and YPT composite coatings have better laser protection effect than traditional YSZ coating,because in the early stage of laser ablation,the PCS decomposition on the coating surface can consume laser energy,and the residual Y2SiO5,SiC and SiO2 phases after ablation can be deposited on the YSZ coating,forming a dense protective layer,which can continue to play a role in laser protection of the YSZ coating.YPY coating has better laser protection performance than YPT coating,because Y2O3 has higher thermal conductivity and lower coefficient of thermal expansion.Smaller temperature gradient can be produced in YPY coating,which can alleviate thermal stress.Moreover,Y2O3 participates in the pyrolysis of PCS to generate Y2SiO5 phase,which inhibits more volume expansion in PCS pyrolysis than that in TiO2.In addition,the core ablation temperature of YPY coating is higher,and the formation of PCS pyrolysis products SiC and SiO2 phase is faster,which can timely protect the lower coating,showing better laser ablation resistance.This study is expected to provide a new idea for the design of novel laser resistant composite coatings.关键词
聚碳硅烷/添加相/复合涂层/裂解/抗激光烧蚀性能Key words
polycarbosilane/addition/composite coating/pyrolysis/laser ablation resistance分类
化学化工引用本文复制引用
蔡佳,赵芳霞,范栋,黄利平,牛亚然,郑学斌,张振忠..聚碳硅烷基复合涂层PCS裂解行为及其抗激光烧蚀性能[J].无机材料学报,2023,38(11):1271-1280,10.基金项目
上海市科学技术委员会科学基金项目(20ZR1465700)Natural Science Foundation of Shanghai(20ZR1465700) （20ZR1465700）
