In the course of developing functionally graded tungsten/steel-layer systems as protective coatings for the first wall (FW) of future fusion reactors, an overview of the results attained so far is given. This includes the determined parameters for creating such systems by vacuum plasma spraying on a laboratory scale and the achieved material properties determined in previous works. To realize the coating of future full scale FWs as well, the coating process is adapted to larger coating areas in the form of mock-ups. For such components, special attention needs to be paid to the challenges of the limited temperature window during coating to achieve good coating adhesion, whilst avoiding exceeding the tempering temperature of the steel. One successfully coated mock-up is also exposed to fusion-relevant heat loads in HELOKA (Helium Loop Karlsruhe) to evaluate the coating system behavior and verify its durability. Finally, for even larger components the coating design and process ar...

中文翻译：

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在实验室规模上使用功能梯度W / EUROFER层涂覆第一批墙组件的开发进展

在开发功能分级的钨/钢层系统作为未来聚变反应堆第一壁（FW）的保护涂层的过程中，概述了迄今为止取得的成果。这包括在实验室规模上通过真空等离子喷涂创建此类系统所需的确定参数，以及先前工作中确定的已达到的材料性能。为了也实现未来的全尺寸FW的涂层，涂层工艺以实体模型的形式适用于较大的涂层区域。对于此类组件，需要特别注意涂层过程中温度窗口有限的挑战，以实现良好的涂层附着力，同时避免超过钢的回火温度。一种成功的涂层模型也暴露于HELOKA（Helium Loop Karlsruhe）中与熔化有关的热负荷下，以评估涂层系统的性能并验证其耐用性。最后，对于更大的零件，涂层的设计和加工过程也可能会发生变化。