Wear aspects of internal combustion engine valves

7th International Conference on Advanced Concepts in Mechanical Engineering

Panuru, M.^1 ; Chicet, D.^2 ; Paulin, C.^1 ; Alexandru, A.^2 ; Munteanu, C.^1

Mechanical Engineering Mechatronics and Robotics Department, Gheorghe Asachi Technical University of Iasi, Iasi, Romania^1

Materials Science and Engineering, Materials Science Department, Gheorghe Asachi Technical University of Iasi, Iasi, Romania^2

关键词: Active surfaces;    Atmospheric plasma spraying;    Commercial powders;    Corrosion and wears;    Micro-structural;    Severe corrosion;    Surface engineering;    Thermal barrier;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012036/pdf
DOI  :  10.1088/1757-899X/147/1/012036

来源: IOP

【 摘 要 】

Because the surface engineering is becoming an increasingly viable alternative to the constructive changes made to improve the efficiency of internal combustion engines, have been proposed and tested various types of coatings of some organs of internal combustion engines. One vital organ is the engine valves, which is subjected during operation to combined thermal, mechanical, corrosion and wear solicitations, which are leading to severe corrosion and complete breakdown. In this paper were analyzed aspects of valves wear and the active surfaces were coated using the atmospheric plasma spraying method (APS) with two commercial powders: Ni-Al and YSZ. Microstructural analyzes were made on these layers and also observations regarding the possibility of using them as thermal barrier and anti-oxidant coatings.