Testing Hardide CVD coating performance under high level of dynamic/cyclic deformation

钨/碳化钨(W/WC)涂层被广泛应用于工程系统的设计中，以承受高静载和循环载荷。了解涂层的极限对于帮助设计最优涂层是必要的，该涂层将适用于需要高弯曲变形和抗疲劳性的高关键应用。该项目将重点测试在高静态和循环载荷下通过化学气相沉积(CVD)沉积的W/WC涂层，并确定关键涂层特性对其在氢气和发电部门要求苛刻的应用中性能的影响。我们将使用仪表化四点弯曲试验来研究涂层断裂机理，测量断裂极限，并测试几种优化涂层在高静态和动态载荷下性能的方法。参与解决这一技术挑战的项目团队包括Hardide plc，一家中小型企业，它是CVD纳米结构W/WC涂层的先驱，现在被空中客车和其他蓝筹股工业客户使用，以及英国国家物理实验室(NPL)，英国国家测量研究所。Hardide和NPL将结合他们在涂层沉积、机械测试和材料表征方面的专业知识，研究涂层在高静载和循环加载条件下的行为。

Tungsten/Tungsten Carbide (W/WC) coatings are widely employed in the design of engineering systems to withstand high static and cyclic loading conditions. Understanding the limits of the coating is necessary to help design optimal coatings which would be suitable for highly critical applications necessitating high flexural deformation and fatigue resistance. The project will focus on testing the W/WC coatings deposited through Chemical Vapour Deposition (CVD) under high static and cyclic loads and identifying the impact of key coating characteristics on its performance in demanding applications for the Hydrogen and power generation sectors. Instrumented four-point-bend tests will be employed to study the coating fracture mechanism, measure the fracture limits and test several approaches to optimise the coating performance under high static and dynamic loads.The project team involved in addressing this technical challenge includes Hardide plc, an SME which pioneered the CVD nanostructured W/WC coatings now used by Airbus and other blue chip industrial customers and the National Physical Laboratory (NPL), the UK's National Measurement Institute. Together Hardide and NPL will combine their expertise in coating deposition, mechanical testing, and material characterisation to study the behaviour of the coatings when subjected to high static and cyclic loading conditions.