Synthesis, thermal stability, and oxidation behavior of MoAlB coatings

MoAlB涂层的合成、热稳定性和氧化行为

• 批准号: 530828152
• 负责人: Professor Jochen M. Schneider, Ph.D.
• 金额: --
• 依托单位: Lehrstuhl für Werkstoffchemie (MCh)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/530828152?language=en
• 关键词: Synthesis; thermal; stability; oxidation; behavior

We aim to explore thermal stability and oxidation behavior of >10 micrometer thick MoAlB coatings for the first time. Both, thermal- and chemical stability data are required to gauge the application potential of MoAlB coatings in harsh environments. We have demonstrated both, the first-time lab scale synthesis of underdense and dense MoAlB coatings. We have also reported the only scale thickness measurement of MoAlB coatings that can be found in the literature: The oxidation kinetics of MoAlB coatings at 1200°C in ambient air seem to be comparable to those of bulk MoAlB and significantly lower than those reported for bulk Ti2AlC. However, the underlying mechanisms are unknown for MoAlB coatings. Based on a temperature- and time-dependent oxidation behavior study, we will obtain reliable data on the oxidation kinetics of MoAlB coatings and gain an understanding of the prevailing mechanisms during oxidation. Furthermore, these new findings will be compared to literature data and other protective coatings, particularly TiAlN and TiAlB2 which are currently investigated within the framework of a DFG-funded project at Materials Chemistry. This understanding will directly influence the knowledge-driven design of future high-temperature protective coatings.

我们的目标是首次探索&gt；10微米厚的MoAlB涂层的热稳定性和氧化行为。要评估MoAlB涂层在恶劣环境中的应用潜力，需要获得热稳定性和化学稳定性数据。我们已经演示了这两种方法，首次在实验室规模合成了致密和致密的MoAlB涂层。我们还报道了文献中唯一可以找到的MoAlB涂层的氧化膜厚度测量：MoAlB涂层在1200℃的环境空气中的氧化动力学似乎与块体MoAlB的氧化动力学相似，但显著低于报道的块体Ti2AlC的氧化动力学。然而，MoAlB涂层的潜在机制尚不清楚。基于对氧化行为随温度和时间变化的研究，我们将获得关于MoAlB涂层氧化动力学的可靠数据，并了解氧化过程中的主要机理。此外，这些新的发现将与文献数据和其他保护性涂层进行比较，特别是目前正在DFG资助的材料化学项目框架内进行研究的TiAlN和TiAlB2。这一认识将直接影响未来高温防护涂料的知识驱动设计。