Laser coating of titanium carbide and titanium boride on aluminium substrate

Laser coating is an advanced material processing technology that has potential to deposit various materials locally on non-planar and complex surfaces. It can be used to refurbish or improve characteristics like corrosion, wear and other surface related properties of the components (base metal and coating material). Surface hardness, wear resistance and corrosion resistance are the main properties that we consider in this study. In present study, a pulsed Nd:Yag laser will be used to deposit TiC and TiB2 on the base metal (aluminium). Thus produced laser coating samples will be subjected to various mechanical (hardness, wear resistance) and metallurgical (microstructure and composition by XRD and Optical microscopy) analyses by changing different laser coating parameters such as laser power, laser scan speeds, frequency et

TiB2-TiC-Al2O3 coating on Aluminium substrate by in-situ laser coating process using pulsed Nd: YAG laser

To improve the microhardness and wear resistance of mechanical components, laser coating has been applied to deposit in situ TiB2-TiC-Al2O3 coating on Aluminium substrate using Titanium oxide, Boron carbide and Aluminium as the coating powder. The phase constituents and microstructure of the composite coating were investigated using field emission scanning electron micrograph (SEM) and X-ray diffraction (XRD). Vicker’s Microhardness tester was used to measure the microhardness at the coating cross section. Results show that crack free composite coating with metallurgical bonding to the aluminium substrate obtained. Microstructure analysis confirms the formation of TiB2, TiC and Al2O3 in the coating zone. The microhardness improved significantly in comparison to the as-received Aluminium substrate due to the presence of the hard reinforcement TiB2 and TiC