New approaches to the assessment and control of microstructure and stress in advanced protective coatings

在航空航天、汽车、制造、生物医学、采矿、能源等许多工业部门，防护涂料的发展带来了非常重要的挑战和机遇，对可持续发展以及显著的经济和环境效益产生了重大影响。尽管在PC制造工艺和涂层结构方面取得了进展，但这一领域的接受和进一步发展往往受到涂层系统中高残余应力的限制，主要与对应力产生机制、应力与微结构的复杂关系、补偿路径的可用性以及如何将其包括在涂层系统设计中缺乏基本和全面的知识有关。 为了应对这些技术挑战和目标，蒙特利尔理工大学(PM)的FCSEL团队与MDS涂层技术公司(MCT)和IHI Hauzer Techno Coating BV(Hauzer)合作，建议研究先进防护涂层中微结构和应力的评估和控制的新方法。具体地说，在拟议的项目中，我们将研究使用高度互补的沉积技术的硬PC系统中存在的残余应力的来源和管理策略，确定它们对镀膜部件性能的影响，并开发基于实验室的方法来测量镀膜部件中的残余应力分布。通过我们与工业合作伙伴的合作，我们的目标是在对加拿大至关重要的领域加速实施新的PC沉积技术，特别是在航空航天和制造业。

The development of protective coatings (PC) presents very important challenges and opportunities with a strong impact on sustainable development as well as significant economic and environmental benefits in many industrial sectors including aerospace, automotive, manufacturing, biomedical, mining, energy and others. Despite the progress in PC fabrication processes and coating architectures, the acceptance and further advances in this area are frequently limited by high residual stress in the coating systems, primarily related to the lack of fundamental and comprehensive knowledge of the stress generating mechanisms, their complex relation to the microstructure, and the availability of pathways to compensate for it, and even how to include it in the coating system design. In response to these technological challenges and goals, the FCSEL team at Polytechnique Montreal (PM), in collaboration with MDS Coating Technologies (MCT) and IHI Hauzer Techno Coating BV (Hauzer), proposes to investigate new approaches for the assessment and control of microstructure and stress in advanced protective coatings. Specifically, within the proposed project, we will study the origins and management strategies of residual stresses present in hard PC systems using highly complementary deposition techniques, determine their impact on in operando coated component performance, and develop laboratory-based methodologies to measure residual stress distribution in coated parts. Through our collaboration with our industrial partners, the goal is to accelerate implementation of new PC deposition technologies in areas of primary importance for Canada, especially in aerospace and manufacturing.