Diamond-Like Carbon (DLC) films have been widely studied due to their interesting properties, but this film presents low adhesion on metal surfaces. Interlayers have been performed, between the substrate and the DLC film, combined with previous surface treatment as plasma nitriding to improve film adhesion on the surface. This work aims to develop a multilayer treatment of nitriding, gradient treatment, and DLC film deposition without organosilicon interlayer to determine the synergic influence of treatments on multilayer adhesion, wear, and corrosion resistance of the AISI 4340 steel. Plasma surface treatments such as simple nitriding, simple DLC film deposition, which consists of treatments performed individually, multilayer treatment of nitriding + DLC with and without an organosilicon interlayer, and multilayer treatment of nitriding + gradient treatment + DLC without interlayer using gas flow gradient were carried out using a pulsed-DC power supply. The highest wear and corrosion resistance was obtained by the multilayer treatment with organosilicon interlayer due to the synergic effect of this interlayer with the DLC film and nitriding treatment, but the multilayer treatment without organosilicon interlayer performed with gas flow gradient presents better corrosion and wear properties compared with simple treatment. Results have shown that it is possible to perform multilayer treatments with the presence and the absence of an organosilicon interlayer, keeping wear, corrosion, and adhesion properties of the DLC film on nitrided AISI 4340 steel deposition.

类金刚石碳 (DLC) 薄膜因其有趣的特性而得到广泛研究，但这种薄膜在金属表面的附着力较低。在基板和 DLC 薄膜之间进行了夹层，结合先前的表面处理如等离子渗氮，以提高表面上的薄膜附着力。这项工作旨在开发一种没有有机硅中间层的氮化、梯度处理和 DLC 薄膜沉积的多层处理，以确定处理对 AISI 4340 钢的多层粘附、磨损和耐腐蚀性的协同影响。等离子表面处理，例如简单的氮化、简单的 DLC 薄膜沉积，包括单独进行的处理、氮化 + DLC 的多层处理，有或没有有机硅中间层，氮化处理+梯度处理+无中间层DLC的气流梯度多层处理使用脉冲直流电源进行。由于夹层与DLC膜和氮化处理的协同作用，有机硅夹层多层处理获得了最高的耐磨性和耐腐蚀性能，但与气流梯度进行的无有机硅夹层多层处理相比，具有更好的耐腐蚀性和耐磨性通过简单的治疗。结果表明，可以在存在和不存在有机硅夹层的情况下进行多层处理，从而在氮化 AISI 4340 钢沉积物上保持 DLC 薄膜的磨损、腐蚀和粘附特性。