Development of biocompatible magnesium alloy with high corrosion resistance using hybrid coating consisting of thick DLC film

在AZ80镁合金表面沉积了厚层DLC、多层DLC、高粘附型DLC和低拱型DLC，并在空气和3%氯化钠溶液中进行了疲劳试验。结果表明，多层和低拱形沉积对提高腐蚀环境下的疲劳强度起到了重要作用。随后，在DLC膜和衬底之间热喷涂WC-12Co作为中间层。复合涂层能很好地提高耐磨性和疲劳强度。在疲劳试验的基础上，提出了最佳中间层厚度。

Thick DLC, multi-layered DLC, high adhesion type DLC and low arching type DLC were deposited on magnesium alloy, AZ80, and fatigue tests were performed in air and 3% NaCl solution. It was found that both multi-layered and low arching deposition played important roll to improve fatigue strengths under corrosive environment. Subsequently, WC-12Co was thermally sprayed between DLC film and substrate as an interlayer. The hybrid coating could well improve both wear-resistance and fatigue strength. The optimal thickness of an interlayer was proposed based on the fatigue tests.