反应等离子弧喷涂制备纳米结构FeAl_2O_4基复合涂层及其摩擦性能研究

Preparation, microstructure and tribological property of nanostructure FeAl_2O_4 matrix composite coating by reactive plasma spraying

通过反应等离子弧喷涂方法喷涂微米级Fe2O3和Al粉体制备FeAl2O4基纳米涂层,并利用XRD,SEM,TEM等方法对复合涂层的结构与形貌进行了测试分析。试验结果表明,复合涂层主要由FeAl2O4,Fe,Al2O3和少量Al Fe相构成,涂层组织为纳米结构,80～200 nm的FeAl2O4基体上分布大量的Fe,Al2O3颗粒。在涂层截面具有典型的等离子弧喷涂层状结构。通过室温以WC-Co涂层为对磨材料干摩擦试验以及磨损形貌和机理的分析,结果显示复合涂层具有优良的耐磨性且磨损方式为疲劳磨损。

The nanostructure FeAl_2O_4 matrix composite coatings were deposited by means of reactive plasma spraying micrometers Fe_2O_3 and Al powders, and the microstructure and wear performance of the coatings were analyzed by XRD, SEM and TEM. The experimental results showed that the composite coating were mainly composited of FeAl_2O_4, Fe, Al_2O_3 and a little Al Fe phase, the coating showed nanostructure. Nanometers Fe and Al_2O_3 particles dispersed in the 80 ~200 nanometers FeAl_2O_4 matrix. The tribological property of coating was tested at room temperature and dry sliding wear against WC-Co coating, wear morphology and the wear mechanism was analyzed.The composite coating showed excellent wear resistant performance and its wear mechanism was fatigue wear.