Premium
Mechanical and tribological properties of DLC coatings deposited by plasma‐based ion implantation and deposition method on polyoxymethylene
Author(s) -
Hirayama Yuki,
Nakamura Morimasa,
Matsuoka Takashi
Publication year - 2020
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6891
Subject(s) - polyoxymethylene , materials science , diamond like carbon , tribology , coating , substrate (aquarium) , composite material , adhesion , deposition (geology) , carbon fibers , ion plating , thin film , atmospheric pressure plasma , plasma , nanotechnology , polymer , composite number , paleontology , oceanography , physics , quantum mechanics , sediment , geology , biology
Polyoxymethylene (POM, polyacetal) is one of the most popular plastics for machine elements, especially in Japan. However, it is difficult to use it under severe operating conditions such as high speed and high contact pressure. Diamond‐like carbon (DLC) coatings were well known to be tribological and functional coatings. However, both POM and DLC coatings are difficult to adhere them each other. In the present paper, DLC coatings are deposited by plasma‐based ion implantation and deposition (PBIID) method on POM substrate, and validity of DLC coatings on POM was investigated through friction and mechanical tests. When gas pressure was 0.2 and 0.8 Pa, hardness and adhesion properties of DLC coating deposited under gas pressure of 0.5 Pa were lower compared with under 0.2 and 0.8 Pa. For preparing DLC coatings having hard and good adhesion properties, relatively thin substrate was suitable. A correlation between relative humidity in the laboratory and friction coefficient was confirmed while DLC coatings remain on the substrate.