Influence of Al2O3, SiC and B4C covalent multilayer PVD coating on surface properties of HSS rod

The physical vapour deposition (PVD) coating technology is realized as the best advance coating methods which improves many multifunctional properties in the tool and also supports metastability and allows multilayer coating arrangements. This paper investigates the effect of Al2O3, SiC and B4C covalent multilayer PVD coating on wear, micro hardness, corrosion and friction properties of HSS rod. A structural design for different material layer properties were defined and coated. Aluminum oxide (Al2O3), Silicon carbide (SiC) and Boron carbide (B4C) particles were coated over the HSS rod up to 1.9 mu m as an intermediate layers using layer formation methods. The wear rate, friction loss and stress developed were tested and compared between PVD coated and uncoated HSS material under different coating layer thickness and tested upon a machined stainless steel disc. Scanning electron microscope (SEM) test was conducted on the sample to study the influence of PVD process on the even dispersion of the coating particles and layer formation characteristics. The results reveal that the wear resistance, microhardness, compressive and thermal stresses were improved by PVD coating of Al2O3, SiC and B4C over HSS rod from 1.1 to 1.9 mu m. (C) 2020 The Authors. Published by Elsevier Ltd.

Automated summary

The PVD coating technology improves wear resistance, friction loss, hardness, and other properties of HSS rods by coating Al2O3, SiC, and B4C particles. Different coating layer thicknesses can lead to better performance enhancement.