Alloy steel 17Cr2NiSiMo coatings with small amounts (<1 wt%) of added Y₂O₃ nanoparticles are fabricated by plasma-transferred arc. The combined effect of the Y₂O₃ nanoparticles and Si-oxide second-phase particles on microstructure, sliding wear resistance, and wear weight loss of the alloy steel coating are investigated. The Y content in the spherical Si-oxide particles is found to increase with the addition of Y₂O₃ nanoparticles, as Si provides second-phase oxide particles for Y to accumulate in the coating material during the rapid cooling solidification. Thus, the Fe-based coating is refined and purified, resulting in a low defect or slag concentration. The wear mechanism of the modified coating transforms from third-body interaction and plastic deformation to slight peeling, as dendritic grains in the coating are transformed into equiaxed grains. The wear performance of the modified coating is obviously enhanced with the addition of 0.4 wt% Y₂O₃ nanoparticles, as indicated by the reduction of its wear weight loss to 20.55% and increase of its relative wear resistance to 25.87%.

通过等离子转移电弧制备了少量（<1 wt％）添加的Y ₂ O ₃纳米粒子的合金钢17Cr2NiSiMo涂层。研究了Y ₂ O ₃纳米粒子和氧化硅第二相粒子对合金钢涂层组织，滑动耐磨性和磨损失重的综合影响。发现球形氧化硅颗粒中的Y含量随着Y ₂ O ₃的添加而增加在快速冷却固化过程中，Si为Y提供了第二相氧化物颗粒，使Y积聚在涂料中。因此，Fe基涂层被精制和纯化，导致低的缺陷或炉渣浓度。当涂层中的树枝状晶粒转变为等轴晶粒时，改性涂层的磨损机理从第三者相互作用和塑性变形转变为轻微剥落。通过添加0.4wt％的Y ₂ O ₃纳米颗粒，改性涂层的磨损性能明显提高，这表明其磨损失重降低至20.55％，其相对耐磨性提高至25.87％。