本文研究了金属添加剂对等离子喷涂氧化铝涂层的抗冲击强度、硬度以及对基体结合强度的影响。探讨了微观组织与涂层性能的关系,从而提出了改善涂层脆性和结合强度的途径。试验表明,添加韧性好的金属(如铝、钼等),可以阻止裂纹扩展,显著提高涂层的结合强度和抗冲击强度,改善了脆性。 In this paper, the effects of metal additives on the impact strength and hardness of plasma sprayed alumina coatings and the bonding strength to matrix were studied. The relationship between microstructure and coating performance was discussed, and the ways to improve the brittleness and bond strength of the coating were proposed. Experiments show that the addition of good toughness of the metal (such as aluminum, molybdenum, etc.), can prevent the crack growth, significantly improve the bonding strength and impact resistance, improved brittleness.