Abstract
To satisfy the harsh service demand of stainless steel and aviation bearing steel, the anticorrosion and wettability behaviors of 9Cr18 stainless steel and M50 bearing steel tailored by ion beam surface modification technology were experimentally investigated. By controlling the ion implantation (F+, N+, N+ + Ti+) or deposition processes, different surface-modified layers and ceramic layers or composite layers with both effects (ion implantation and deposition processes) were obtained on metal surfaces. The wettability was characterized by a contact angle instrument, and the thermodynamics stabilization of ion implantation-treated metals in corrosive solution was evaluated through an electrochemical technique. X-ray photoelectron spectroscopy (XPS) was employed for detecting the chemical bonding states of the implanted elements. The results indicated that ion implantation or deposition-induced surface-modified layers or coating layers could increase water contact angles, namely improving hydrophobicity as well as thermodynamic stabilization in corrosive medium. Meanwhile, wettability with lubricant oil was almost not changed. The implanted elements could induce the formation of new phases in the near-surface region of metals, and the wettability behaviors were closely related to the as-formed ceramic components and amorphous sublayer.
Highlights
Aeroengine bearings always work in complex conditions such as high temperature and load.aeroengine bearings often encounter corrosive environments such as high humidity or salinity, as well as harsh environments during cross-sea flying or the berthing process [1,2,3].it is urgently necessary to combat complex service environments through surface modification technologies to improve the corrosion and wear resistance of bearings under complex uses so as to extend service life
The water contact angle for a pure metal surface is between 60◦ and 70◦ due 2 and Table 2 show the contact angles of 9Cr18 stainless steel samples with various
The water contact angles of 9Cr18 stainless steel and M50 bearing steel increased to some extent through ion implantation or deposition of F+, N+, and N+ + Ti+, indicating the suppression of wettability
Summary
Aeroengine bearings always work in complex conditions such as high temperature and load.aeroengine bearings often encounter corrosive environments such as high humidity or salinity, as well as harsh environments during cross-sea flying or the berthing process [1,2,3].it is urgently necessary to combat complex service environments through surface modification technologies to improve the corrosion and wear resistance of bearings under complex uses so as to extend service life. Surface modification treatments should improve the hydrophobicity of the steel materials without affecting the wettability of lubricants at the same time. Ion beam surface modification is a type of practical and convenient technology. Wettability control by ion beam surface modification is widely applied in hydrophobic material preparation for micro/nanoelectromechanical systems, improvements in biomaterial compatibility, anti-erosion, weldment, and lubrication of metal materials [4,5]. Especially ion implantation, is extensively utilized in research and applications for surface wettability through the modification of atomic configurations, chemical composition, and surface microstructure via high-energy ions, such as in the hydrophilic transformation of hydrophobic organic materials [6], the improvement of anticoagulation/calcification
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
