A Ni-20 wt% Sn coating was deposited by the cold spraying method on steel substrate. The thickness of the deposited coating was approximately 50 μm and porosity was <1%. The coating microstructure consisted of a Ni solid solution with the presence of various intermetallics, which was confirmed by x-ray diffraction and electron microscopy. Stress-strain behaviour of this coating, both in planar and cross-sectional direction, was investigated under in-situ micro-pillar compression. It was found that strength and elastic modulus was slightly higher in the cross-sectional direction of the coating compared to that of the planar direction. The presence of intermetallics in the coating microstructure acts as a reinforcement medium to allow effective load bearing capacity of the coating. Loading direction during compression with respect to splat boundary orientation plays an important role in the mechanism of coating deformation. There was no substantial work hardening, due to the lubricating effect of SnO₂ in the coating system.

通过冷喷涂法将Ni-20wt％的Sn涂层沉积在钢基底上。沉积涂层的厚度约为50μm，孔隙率<1％。涂层的微观结构由具有各种金属间化合物存在的镍固溶体组成，这可以通过X射线衍射和电子显微镜确认。在原位微柱压缩下研究了该涂层在平面和截面方向上的应力应变行为。已经发现，与平面方向相比，在涂层的横截面方向上的强度和弹性模量略高。涂层微结构中金属间化合物的存在充当增强介质，以允许有效的涂层承载能力。相对于splat边界取向，压缩过程中的载荷方向在涂层变形机理中起着重要作用。由于SnO的润滑作用，基本上没有工作硬化₂在涂层系统中。