Development of oxidation and fretting-wear resistant coatings on Titanium Aluminide (TiAl) components

铝化钛 (TiAl) 部件抗氧化和微动磨损涂层的开发

• 批准号: 500663-2016
• 负责人: KlembergSapieha, Jolanta
• 金额: $ 11.66万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693909
• 关键词: Development; oxidation; fretting; wear; resistant

The thrust-to-weight ratio of a gas-turbine engine strongly depends on the performance of the materials involved. In order to achieve high engine efficiency, one can particularly benefit from the use of lightweight materials with high temperature resistance and high mechanical strength. In recent years, TiAl based alloys have been shown to exhibit considerable potential for high-temperature applications in aerospace due to their numerous attractive properties including low density, high specific strength, high elastic modulus and good creep resistance at high temperature. However, most of the applications involving TiAl alloys do not exceed 750°C due to mechanical and environmental limitations for this type of material. Above such high temperature non-protective mixture of Al2O3 and TiO2 is formed, leading to the Ti-alloy oxidation and deterioration. In response to the above limitations, the main objective of the proposed research is to develop coatings and surface treatments that would allow the use of intermetallic TiAl components at elevated temperatures (750-850°C). These coatings should simultaneously possess good oxidation and fretting-wear resistance, and they should not compromise the component fatigue characteristics. This research activity represents a possibility to strongly impact also other technological areas.

气动涡轮发动机的推力重量比很大程度上取决于所涉及的材料的性能。为了提高发动机效率，特别可以从使用具有高温耐药性和高机械强度的轻质材料中受益。近年来，由于其众多吸引人的特性，包括低密度，高特异性强度，高弹性模量和高温下的良好蠕变耐药性，因此已显示基于TIAL的合金在航空航天中具有巨大的高温应用潜力。但是，由于这种材料的机械和环境限制，涉及TIAL合金的大多数应用不超过750°C。在这种高温高于Al2O3和TIO2的非保护混合物之上，导致Ti-Aloy氧化和确定。响应上述局限性，拟议研究的主要目的是开发涂层和表面处理，以允许在升高温度（750-850°C）下使用金属间TIAL成分。这些涂层应简单地假设良好的氧化和刷子耐药性，并且不应损害组件疲劳特征。这项研究活动代表了强烈影响其他技术领域的可能性。