title: Surface properties and corrosion behavior of Co-Cr alloy fabricated with selective laser melting technique.
abstract: We sought to study the corrosion behavior and surface properties of a commercial cobalt-chromium (Co-Cr) alloy which was fabricated with selective laser melting (SLM) technique. For this purpose, specimens were fabricated using different techniques, such as SLM system and casting methods. Surface hardness testing, microstructure observation, surface analysis using X-ray photoelectron spectroscopy (XPS) and electrochemical corrosion test were carried out to evaluate the corrosion properties and surface properties of the specimens. We found that microstructure of SLM specimens was more homogeneous than that of cast specimens. The mean surface hardness values of SLM and cast specimens were 458.3 and 384.8, respectively; SLM specimens showed higher values than cast ones in hardness. Both specimens exhibited no differences in their electrochemical corrosion properties in the artificial saliva through potentiodynamic curves and EIS, and no significant difference via XPS. Therefore, we concluded that within the scope of this study, SLM-fabricated restorations revealed good surface properties, such as proper hardness, homogeneous microstructure, and also showed sufficient corrosion resistance which could meet the needs of dental clinics.
authors.affiliation: Stomatology Special Consultation Clinic, Department of Prosthodontics, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Key Laboratory of Stomatology, Shanghai, 200011, China.
authors.forename: Xian-zhen
authors.initials: XZ
authors.lastname: Xin
authors.forename: Jie
authors.initials: J
authors.lastname: Chen
authors.forename: Nan
authors.initials: N
authors.lastname: Xiang
authors.forename: Bin
authors.initials: B
authors.lastname: Wei
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D003343:Corrosion; D055664:Electrochemical Techniques; D006244:Hardness; D007834:Lasers; D044367:Phase Transition; D056951:Photoelectron Spectroscopy; D013499:Surface Properties
chemical_list: D000497:Alloys; D002857:Chromium; D003035:Cobalt