Microstructural Analysis and Tribological Behavior of AMDRY 1371 (Mo–NiCrFeBSiC) Atmospheric Plasma Spray Deposited Thin Coatings

Coatings

CorneliaCîrlan Paleu¹  Viorel Paleu¹  Corneliu Munteanu¹  Bogdan Istrate¹  Petrică Vizureanu²  MădălinaSimona Bălţatu²  Shubrajit Bhaumik³ 

[1] Department of Mechanical Engineering, Mechatronics and Robotics, Faculty of Mechanical Engineering, Gheorghe Asachi Technical University of Iaşi, 63 D. Mangeron Blvd., 700050 Iaşi, Romania;Department of Technologies and Equipments for Materials Processing, Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iaşi, Blvd. No. 51, Mangeron, 700050 Iasi, Romania;Tribology and Surface Interaction Research Laboratory, Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur 603203, India;

关键词: coating;    AMDRY 1371;    Mo–NiCrFeBSiC;    Mo–NiCrBSi;    wear;    friction;   

DOI  :  10.3390/coatings10121186

来源: DOAJ

【 摘 要 】

Water treatment plants include a set of pumping stations, and their mechanical components experience various wear modes. In order to combat wear, the mechanical components of the pumps are coated with various types of wear resistant coatings. In this research, AMDRY 1371 (Mo–NiCrFeBSiC) coatings were deposited with the atmospheric plasma spray (APS) method on parallelepipedal steel samples manufactured from a worn sleeve of a multistage vertical irrigation pump. In order to find an optimum thickness of AMDRY 1371 coatings, the samples were coated with five, seven and nine passes (counted as return passes of the APS gun). Mechanical properties of the coating (microhardness and Young’s modulus) were determined by micro-indentation tests. An AMSLER tribometer was used to investigate the wear resistance and wear modes of the coated samples in dry conditions. A mean coefficient of friction (CoF) of around 0.3 was found for all the samples, but its evolution during the one hour of the test and also the final wear volumes and wear rates depended on the thickness of the coating. To estimate the roughness of the surfaces and the wear volumes, measurements were carried out on a Taylor Hobson profilometer. In order to understand the nature and evolution of wear of coatings of various thicknesses, the unworn and worn surfaces of the coated samples were analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The wear modes of the coatings were studied, emphasizing the coating removal process for each sample. According to our results, for each dry friction application, there is an optimum value of the thickness of the coating, depending on the running conditions.

【 授权许可】

Unknown