Advanced Thermal Barrier Coating Systems for Gas Turbine Application: Microstructure, Properties, and Performance

适用于燃气轮机应用的先进热障涂层系统：微观结构、特性和性能

• 批准号: RGPIN-2015-05862
• 负责人: Huang, Xiao
• 金额: $ 2.55万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=590682
• 关键词: Advanced; Thermal; Barrier; Coating; Systems

In the aerospace and power generation industries, demands to reduce fuel consumption, operating costs, and greenhouse gas emissions continue to push gas turbine engine (GTE) designers to find ways to improve GTE efficiency and extend operating lives. Increasing the turbine inlet temperature is a key way to increase power output without increasing fuel burn. With rising turbine inlet temperatures, demands for continuous operation under harsh environments, and a shift towards alternative fuels, hot section materials are being subjected to increased mechanical stresses and environmental attack. While state-of-the-art superalloys used to manufacture turbine blades, vanes, and combustion components can maintain strength at temperatures up to 1093°C (2000°F), most current and all next generation GTE designs require materials that can safely operate well beyond this temperature. This is only possible with the use of thermal barrier coating (TBC) systems and cooling technology. In addition, many modern superalloys have reduced environmental resistance due to lower Cr content, done to stabilize the microstructure under higher temperatures and mechanical loads. Therefore, TBCs are now required to provide both thermal barrier and environmental protection functions, and have become integral to modern GTEs. With the industry’s goal to designate TBCs as a “prime reliant” in GTE design, further TBC performance improvement and reliability are needed.

在航空航天和发电工业中，降低燃料消耗、运行成本和温室气体排放的需求继续推动燃气涡轮机（GTE）设计者寻找提高GTE效率和延长运行寿命的方法。提高涡轮机入口温度是在不增加燃油燃烧的情况下增加功率输出的关键方法。随着涡轮机入口温度的升高、在恶劣环境下连续运行的需求以及向替代燃料的转变，热截面材料正经受增加的机械应力和环境侵蚀。虽然用于制造涡轮机叶片、轮叶和燃烧部件的最先进的高温合金可以在高达1093 ° C（2000 ° F）的温度下保持强度，但大多数当前和所有下一代GTE设计都需要能够在超过该温度下安全运行的材料。这只有通过使用热障涂层（TBC）系统和冷却技术才能实现。此外，许多现代高温合金由于较低的Cr含量而降低了耐环境性，这是为了在较高的温度和机械负荷下稳定微观结构。因此，现在需要热障涂层同时提供热障和环境保护功能，并且已经成为现代GTE不可或缺的组成部分。随着行业目标将TBC指定为GTE设计中的“主要依赖”，需要进一步改善TBC性能和可靠性。