A thick Al-Fe-Nb-Ni coating with 46% volume fraction of amorphous/nanocrystalline structure was prepared on the low carbon steel substrate through low-cost arc spraying and then post processed by the laser remelting. The evolution of the coating microstructure, micro-hardness and corrosion behavior was comprehensively studied. The porosity of the as-sprayed coatings was as low as 2%. However, the incorporation of Nb element could not sufficiently suppress the long-range migration of atoms to generate fully glassy coatings. After laser remelting, metallurgical bonding was formed along the interface between the substrate and the coating with little substrate material dissolving into the coating. The coating became completely densified, which was dominant in remarkably improving the micro-hardness and the corrosion resistance. In addition, a passive film with the characteristic of p-type semiconductor was formed on the laser-remelted coating.

通过低成本电弧喷涂在低碳钢基材上制备了具有46％体积分数的非晶/纳米晶结构的厚Al-Fe-Nb-Ni涂层，然后通过激光重熔进行后处理。全面研究了涂层的显微组织，显微硬度和腐蚀行为的演变。喷涂后的涂层的孔隙率低至2％。然而，掺入Nb元素不能充分抑制原子的长程迁移以产生完全玻璃态的涂层。激光重熔后，沿着基底和涂层之间的界面形成冶金结合，几乎没有基底材料溶解到涂层中。涂层变得完全致密化，这在显着提高显微硬度和耐腐蚀性方面占主导地位。此外，