本科毕业论文论文题目：LaMgA11109热障涂层材料的制备条件探索姓名：张楠学20151021118院（系、部)：物理与电子工程学院材料物理班级：15级材料物理本一班指导教师：赵素梅完成时间：2019年4月邢台学院2019届本科毕业论文摘要热障涂层(Thermal Barrier Coatings,简称TBCs)是为了进一步提高耐热合金材料（铁基合金、镍基合金、钴基合金)的使用温度而发展起来的涂层技术，该涂层具有热传导系数低、密度小、耐腐蚀、抗氧化、强度高等优点，因此被常应用于航空航天、燃气发电等众多领域。目前最常用热障涂层材料是8YSZ,但是8YSZ的长期使用温度不能高于1200℃。为了满足更高的使用要求，必须采用的方法有三种：一是开发出更先进的高温合金材料，二是进一步改进冷却技术，三是开发新型陶瓷热障涂层材料。研究表明，如果采用过多的内部及外部冷却，就会减小热效率，导致性能下降：另外，进一步提高高温合金工作温度的潜力十分有限。因此，开发热导率更低、韧性更好、使用温度更高、抗腐蚀性能更好的材料是改变这种状况的有效途径之一。对LaMgA11109材料进行了研究，发现其是一种潜在的热障涂层材料。本文通过控制实验条件以找到最优的合成条件，并合成物理化学性质特征最优的热障涂层基体材料LMgA11109热障涂层材料。本文采用水热法，控制烧结温度不同，对合成的LaMgA11109热障涂层材料用扫描电镜(SEM)进行观察和分析。关键词：热障涂层：LaMgA11109热障涂层材料：水热法邢台学院2019届本科毕业论文AbstractThermal Barrier Coatings (TBCs)is a coating technology developed to further improve theservice temperature of heat-resistant alloy materials(ferroalloys,nickel-based alloys,cobalt-based alloys).This coating has the advantages of low thermal conductivity,low density,corrosion resistance,oxidation resistance and high strength,so it is often used in aerospace,gaspower generation and many other fields.At present,the most commonly used thermal barriercoating material is 8YSZ,but the long-term use temperature of 8YSZ can not be higher than1200 C.In order to meet the higher application requirements,three methods must be adopted:one is to develop more advanced superalloy materials,the other is to further improve coolingtechnology,and the third is to develop new ceramic thermal barrier coating materials.The resultsshow that if excessive internal and external cooling is used,the thermal efficiency will bereduced and the performance will be degraded.In addition,the potential of further improving theworking temperature of superalloys is very limited.Therefore,the development of materials withlower thermal conductivity,better toughness,higher temperature and better corrosion resistanceis one of the effective ways to change this situation.LaMgAll109 is a potential thermal barriercoating material.In this paper,LaMgAll109 thermal barrier coating material with the bestphysical and chemical properties was synthesized by controlling the experimental conditions.Inthis paper,the synthesized LaMgAll109 thermal barrier coating material was observed andanalyzed by scanning electron microscopy (SEM)with different sintering temperature controlledby hydrothermal method.Key words:thermal barrier coating;LaMgAll109 thermal barrier coating material;hydrothermal method