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surface engineering
29 Jan 2021

Surface Engineering: A Revolution in Tribology

In today’s world, almost 20-30% frictional loss accounts for piston-ring-liner (PRL) assembly, and therefore researchers and industrialist are concerned, how its tribological properties can improve the efficiency of the engine, because PRL exposure to intricate thermal stresses, oxidation, mechanical stresses, and wear and also severe running environment leads to the detrimental and convoluted mechanism at the interface of PRL. The basic wear mechanism caused at the interface of PRL contact are abrasive, corrosion, and fatigue,  while during the initial running-in period, adhesion wears mainly arises, whereas delamination, oxidation, and abrasion are mostly occurring due to steady rubbing.

Contact between PRL is always subjected to temperature change and repetitive mechanical load at the rubbing surface and may leads to surface damage such as spalling, delamination, and pitting. Surface engineering and modification can alter the thermal, mechanical, and tribological behavior of contacts and also typically used to enhance wear resistance in engine contact.

Surface modification and engineering are some of the most important approaches in the reduction of friction and wear. Surface engineering may be defined as the design of surfaces to improve and enhance the functional properties of the substance. The effective execution of surface requires interdisciplinary activity, surface design, and planning, which finally results in cost-effective enhancement of surface.

Therefore, material engineers are always puzzling in innovation and modifying materials that are widely used in engineering component design. With the help of surface modification, engineers can enhance and improve the properties and life of existing engineering materials. Surface modification and engineering are some of the most important approaches in the reduction of friction and wear.

In extensive work, surface modification of nano HVOF, thermal and plasma spray, ceramic or metallic alloying, nitriding, hard chrome plating have been recommended to improve tribology in piston rings. The cost-effectiveness, production of high-quality coating, environment-friendly nature, and on-site applications are some of the advantages of surface engineering.

The barrier to adopting the surface engineering process is the shortage of its skill but SGT University: Gurugram helps to fill the gap and had trained the students to handle the requirements of surface engineering technology. The Students of the mechanical engineering department, SGT University, Gurugram developed and characterized composite coating for piston ring applications.