等离子喷涂陶瓷涂层性能的研究

金属基底上喷涂陶瓷涂层使表面具有耐磨、耐磨蚀、耐高温等特点，用运等离子涂技术在４５号钢表面喷涂Ａｌ２Ｏ３、Ａｌ２Ｏ３－３％、ＴｉＯ２、ＴｉＯ２、ＺｒＯ２－８％Ｙ２Ｏ３等四种陶瓷涂层，部分采用Ｎｉ包Ａｌ为打底层，检测陶瓷涂层的硬度，耐磨性及结合力等力学性能，并进行相和扫描电镜观察，四种陶瓷涂层的表面硬度达到７０－９０ＨＲ１５Ｎ；有打底层的陶瓷涂层的硬度稍大于无底层的涂层硬度；Ａｌ２Ｏ３－３％ＴｉＯ２

Research on Properties of Ceramic Coatings by Plasma Spraying

Ceramic coatings on the metals substrate have friction and wear resistance, corrosionresistance, and high temperature resistance. 4 kinds of ceramic coatings Al2O3, Al2O3-3%TiO2, TiO2ZAO2-8%Y2O3 on steel substrate were fabricated with plasma spraying. Some coatingr undercoatedwith powder of Al covered with Ni. The detection of microscope revealed that the surface hardnessof the coatings was 70-90HR15N. The hardness of undercoated coatingr were higher than thoseof no undercoated coatings. Al2O3-3% TiO2 coatings had higher hardness and Al2O3 coatingshad the best friction and wear resistance, TiO2 coatings had higher adhesion than others. Theundercoated ceramic coatings had higher adhesion than the same kinds of coatings with-outundercoated layers. Metallurgical microscope and scanning electron microscope observation illuminated the topography of coatingr with and without undercoated layers for cross section specimen,which were identical with the above detection results.