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.

我们旨在首次探索> 10微米厚的Moalb涂层的热稳定性和氧化行为。需要热和化学稳定性数据来衡量在Harmsh环境中Moalb涂层的应用潜力。我们已经证明了第一次实验室量表的不足和致密的摩尔布涂层的合成。我们还报道了在文献中可以找到的摩尔布涂层的唯一比例尺厚度测量：在环境空气中，在1200°C下，摩尔布涂层的氧化动力学似乎与散装摩尔布的氧化动力学相当，并且明显低于散装TI2ALC的散装动力学。但是，摩尔布涂层的基本机制是未知的。基于温度和时间依赖性的氧化行为研究，我们将获得有关Moalb涂层的氧化动力学的可靠数据，并了解氧化过程中现行机制的理解。此外，这些新发现将与文献数据和其他受保护的涂料进行比较，尤其是Tialn和Tialb2，这些涂料目前在材料化学的DFG资助项目的框架内进行了研究。这种理解将直接影响未来高温保护涂层的知识驱动的设计。