宇航材料工艺http：//www.yhclgy.com2023年第1期·新材料新工艺·MoSi2-YSZ高发射涂层对硅橡胶基防热材料的隔热及抗热振性能影响张瑞吉1，2余亚丽1，2张醒3胡励3郭芳威1，2（1上海交通大学材料科学与工程学院，上海200240）（2上海市先进高温材料及其精密成形重点实验室，上海200240）（3上海宇航系统工程研究所，上海200240）文摘制备了MoSi2-YSZ复合硅橡胶基辐射型热防护涂层，并对其耐烧蚀性能和抗热振性能进行了表征。结果表明：与传统烧蚀型涂层相比，辐射型涂层在0.3~2.5µm波段发射率达到0.93以上，且静态热流测试背板温升降低60%，热振测试背板温升降低30%。辐射型涂层在热振测试中由于辐射散热机制表现出对温度响应的迟滞性，使得背板温度变化率的峰值降低40%。MoSi2氧化形成的致密氧化层具有良好的保护性和自愈合性，从而提高了涂层的耐烧蚀和抗热振性能。关键词MoSi2，高发射率，抗热振性能，耐烧蚀性能，自愈合性中图分类号：TQ336.9DOI：10.12044/j.issn.1007-2330.2023.01.007EffectoftheMoSi2-YSZHigh-emissivityCoatingsonthePerformanceofThermalInsulationandThermalShockResistanceofAblativeMaterialsBasedonSiliconeRubberZHANGRuiji1，2YUYali1，2ZHANGXing3HULi3GUOFangwei1，2（1SchoolofMaterialsScienceandEngineering，ShanghaiJiaoTongUniversity，Shanghai200240）（2ShanghaiKeyLaboratoryofAdvancedHigh-temperatureMaterialsandPrecisionForming，Shanghai200240）（2ShanghaiInstituteofAerospaceSystemEngineering，Shanghai200240）AbstractSiliconerubber-basedradiantthermalprotectioncoatingwaspreparedbyMoSi2-YSZfillerandcharacterizedwithablationresistanceandthermalshockresistance.Comparedwithtraditionalablationcoating，thehigh-emissivitycoatingwithMoSi2-YSZhasanemissivityover0.93intherangeof0.3~2.5µm，thetemperatureriseofthebackboardofhigh-emissivitycoatingisreducedby60%instaticheatingcondition，whilethetemperatureriseofthethermalshocktestisreducedby30%.High-emissivitycoatingsexhibithysteresisinresponsetotemperatureduetotheheatdissipationofradiationduringhightemperaturetesting，thepeaktemperaturechangerateofthebackboardisreducedby40%.Inaddition，thedenseoxidelayerformedbyMoSi2oxidationalsohasgoodprotectionandself-healingpropertiesfortheinner...
