title: [Energy dispersive spectrum analysis of surface compositions of selective laser melting cobalt-chromium alloy fabricated by different processing parameters].
abstract: OBJECTIVE
  To fabricate selective laser melting cobalt-chromium alloy samples by different processing parameters, and to analyze the changes of energy dispersive spectrum(EDS) on their surface.
  
  
  METHODS
  Nine groups were set up by orthogonal experimental design according to different laser powers,scanning speeds and powder feeding rates(laser power:2500-3000 W, scanning speed: 5-15 mm/s, powder feeding rate: 3-6 r/min). Three cylinder specimens(10 mm in diameter and 3 mm in thickness) were fabricated in each group through Rofin DL 035Q laser cladding system using cobalt-chromium alloy powders which were developed independently by our group.Their surface compositions were then measured by EDS analysis.
  
  
  RESULTS
  Results of EDS analysis of the 9 groups fabricated by different processing parameters(Co:62.98%-67.13%,Cr:25.56%-28.50%,Si:0.49%-1.23%) were obtained. They were similar to the compositions of cobalt-chromium alloy used in dental practice.
  
  
  CONCLUSIONS
  According to EDS results, the surface compositions of the selective laser melting cobalt-chromium alloy samples are stable and controllable, which help us gain a preliminary sight into the range of SLM processing parameters. Supported by "973" Program (2012CB910401) and Research Fund of Science and Technology Committee of Shanghai Municipality (12441903001 and 13140902701).
authors.affiliation: Department of Stomatology Special Consultation Clinic,Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011,China.E-mail:369078249@qq.com.
authors.forename: Liang
authors.initials: L
authors.lastname: Qian
authors.forename: Li
authors.initials: L
authors.lastname: Zeng
authors.forename: Bin
authors.initials: B
authors.lastname: Wei
authors.forename: Yao
authors.initials: Y
authors.lastname: Gong
mesh_terms: D002858:Chromium Alloys; D007834:Lasers; D013057:Spectrum Analysis; D013499:Surface Properties
chemical_list: D002858:Chromium Alloys