講座題目： 自愈合熱障塗層的製備與表征

　　報  告 人👩🏼‍⚕️： Denise Koch

　　時  　 間♨️：2019年5 月31 日 上午 9:0 0-11 : 00

　　地  　 點：5號教學樓502-1 

　　主辦單位💀：意昂平台🧑🏼‍🚒、 材料學院

　　報名方式🤏：登錄意昂官网微信企業號---第二課堂---課程報名中選擇“【百家大講堂】第 208期：自愈合熱障塗層的製備與表征 ”

 

【主講人簡介】

 主講人簡介（中文）

Denise Koch,德國Julich研究所，能源與氣候研究所（IEK-1）博士。自2016年起，從事自愈熱障塗層的製備與研究🧙🏼，與西安交通大學合作，承擔國家項目中新型熱障材料（如GZO）的性能研究課題，以及國際項目中懸浮等離子噴塗（SPS）形成的微觀結構。

主講人簡介（英文）

Denise Koch was born in Jena, Germany in 1988. She received her Master’s degree (M. Sc.) in Chemistry from RWTH Aachen University and received her Ph.D. degree in Engineering from the Institute for Energy and Climate Research (IEK-1) at ForschungszentrumJulichin. Since then, she studies on the manufacturing of self-healing thermal barrier coating, investigating the performance of new TBC-materials such as GZO within a national project and also the microstructure established by Suspension Plasma Spraying (SPS) within an international Project in cooperation with Xi’an Jiaotong University.

 

 

【講座內容簡介】

由於燃氣輪機提高效率和負載靈活性的目標是工業應用的關鍵目標之一，因此對用於發動機的熱障塗層（TBC）的要求也在不斷提高🤼。一種提高熱障塗層壽命的方法是在塗層中添加功能材料💁🏿，例如自愈合成分，即可以重新密封工作過程中出現的裂縫。二矽化鉬（MoSi2）是一種有前途的愈合劑。MoSi2和Yttria穩定氧化鋯（YSZ）同時噴塗，是目前最先進的TBC材料💁🏽‍♂️🧎‍♂️‍➡️，由於MoSi2的熔化溫度低於YSZ🦚，並且在噴塗過程中伴有Si的蒸發👨🏽‍⚕️，所以這種塗層在製備上極具挑戰性。當使用特定的兩點註射系統進行加工時🔙，兩種材料都可以在不分解的情況下沉積。這種方法製備的塗層，MoSi2在TBC運行期間氧化，從而修復裂紋，從而避免TBC的失效。爐子循環試驗和實際的燃燒器臺架梯度試驗表明，這種方法延長了TBC壽命👨‍🔬。

內容簡介（英文） As the aim for a higher efficiency and improved load flexibility of gas turbines is one of the key-goals for industrial use, the demands on thermal barrier coatings (TBCs) for engine applications are rising. These can only be achieved by significantly increasing the performance of TBCs. One approach to increase the lifetime of TBCs is the addition of functional materials to the coating itself. For example a self-healing agent that can reseal cracks that occur during operation. Molybdenum disilicide (MoSi2) is a promising healing agent. The simultaneous spraying of MoSi2 and the yttria-stabilized zirconia (YSZ), which is the state of the art material for TBCs, is highly challenging, as the melting temperature of MoSi2 is lower than that of YSZ and during spraying Si can evaporate leaving only Mo deposited in the coating. When processed with a certain two point injection system, both materials can be deposited without decomposition. The MoSi2 oxidizes during the operation of the TBC which heals cracks that otherwise would lead to the failure of the TBC. Furnace cycling test and more realistic burner-rig gradient tests show increased TBC lifetimes for this approach.