The present work was focused on the study of a composite metal-ceramic coating synthesised by atmospheric pulsed plasma deposition using an electro-thermal plasma accelerator. “Bronze/WC carbides” coating of 85–135 μm width was formed on the surface of grey cast iron due to high-current erosion of a sintered cathode (50 vol% of Al-bronze and 50 vol% WC) without post-plasma heat treatment. The work was conducted using OM, SEM/EDS, XRD, hardness and “Ball-on-Disc” dry-sliding testing. Numerical modelling and high-speed photo-shooting were applied to reveal the two-stage mechanism of the coating formation. The coating/substrate transitional layer was formed due to the dynamic interaction of a plasma flux with a plasma-melted substrate surface. WC carbides crystallised from the plasma flux in a transitional layer or they were embedded to the coating being transferred by plasma flux as unmolten angular particles. Wear test showed that the «Bronze/WC carbide” composite coating had much better tribological behaviour as compared to bulk copper under the friction against a steel ball. At the same time, the coating was inferior in wear resistance to copper when sliding against a SiC ball.

目前的工作集中在研究通过使用电热等离子体加速器的大气脉冲等离子体沉积合成的复合金属陶瓷涂层。在灰铸铁表面上形成了宽度为85–135μm的“青铜/碳化钨碳化物”涂层，这是由于烧结后的阴极（50体积％的铝青铜和50体积％的WC）受到大电流侵蚀而没有后等离子体热处理。这项工作是使用OM，SEM / EDS，XRD，硬度和“圆盘球”干式滑动测试进行的。数值模拟和高速摄影被用来揭示涂层形成的两阶段机理。由于等离子体通量与等离子体熔化的衬底表面之间的动态相互作用而形成涂层/衬底过渡层。WC碳化物从等离子流在过渡层中结晶出来，或者嵌入到涂层中，并通过等离子流作为未熔化的角粒转移到涂层中。磨损测试表明，在与钢球摩擦的情况下，与散装铜相比，“青铜/碳化钨”复合涂层的摩擦学性能要好得多。同时，当与SiC球滑动时，该涂层的耐磨性差于铜。