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干冰微粒喷射法被应用到大气等离子喷涂中以改善涂层的性能。文中采用等离子喷涂和干冰微粒喷射工艺在不锈钢基体表面制备了钢涂层,并研究了涂层的微观结构、孔隙率、温度、氧化、表面粗糙度和结合强度等性能。结果表明,由于干冰微粒喷射具有较高的冷却效率,加之干冰微粒撞击所产生的机械作用,等离子喷涂制备的钢涂层呈现出更致密的结构特征。相比于空气冷却制备的涂层,干冰微粒冷却制备的涂层含有更少的氧化物。另外,干冰微粒喷射工艺对基体的预处理使得涂层的结合强度提高了将近14%,这是由于干冰微粒喷射工艺对基体上吸附的有机物质具有清洁作用,主要基于干冰颗粒的热、机械和膨胀的综合效应。
Dry ice particle spraying is applied to atmospheric plasma spraying to improve coating performance. In this paper, the coatings of stainless steel were prepared by plasma spraying and dry ice particle spraying. The microstructure, porosity, temperature, oxidation, surface roughness and bonding strength were also studied. The results show that due to the high cooling efficiency of the dry ice particle jet and the mechanical effect of the dry ice particle impact, the steel coating prepared by plasma spraying shows a denser structural feature. In contrast to air-cooled coatings, coatings made from dry ice particle cooling contain less oxide. In addition, the pretreatment of the substrate by the dry ice particle jetting process resulted in an increase in the bonding strength of the coating by nearly 14% due to the dry ice particle jetting process cleaning of the adsorbed organic material on the substrate, based primarily on the thermal, mechanical and The combined effect of inflation.