title: [The measurement of thermal expansion coefficient of Co-Cr alloy fabricated by selective laser melting].
abstract: OBJECTIVE
  To investigate the thermal expansion coefficient of different processing parameters upon the Co-Cr alloy prepared by selective laser melting (SLM) technique, in order to provide technical support for clinical application of SLM technology.
  
  
  METHODS
  The heating curve of self-made Co-Cr alloy was protracted from room temperature to 980°C centigrade with DIL402PC thermal analysis instrument, keeping temperature rise rate and cooling rate at 5 K/min, and then the thermal expansion coefficient of 9 groups of Co-Cr alloy was measured from 20°C centigrade to 500°C centigrade and 600°C centigrade.
  
  
  RESULTS
  The 9 groups thermal expansion coefficient values of Co-Cr alloy heated from 20°C centigrade to 500°C centigrade were 13.9×10(-6)/K,13.6×10(-6)/K,13.9×10(-6)/K,13.7×10(-6)/K,13.5×10(-6)/K,13.8×10(-6)/K,13.7×10(-6)/K,13.7×10(-6)/K,and 13.9×10(-6)/K, respectively; when heated from 20°C centigrade to 600°C centigrade, they were 14.2×10(-6)/K,13.9×10(-6)/K,13.8×10(-6)/K,14.0×10(-6)/K,14.1×10(-6)/K,14.1×10(-6)/K,13.9×10(-6)/K,14.2×10(-6)/K, and 13.7×10(-6)/K, respectively.
  
  
  CONCLUSIONS
  The results showed that the Co-Cr alloy has good matching with the VITA VMK 95 porcelain powder and can meet the requirement of clinic use.
authors.affiliation: Department of Stomatology Special Consultation Clinic, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China. E-mail:15216695232@163.com.
authors.forename: Xiao-mei
authors.initials: XM
authors.lastname: Tian
authors.affiliation: Department of Stomatology Special Consultation Clinic, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zeng
authors.affiliation: Department of Stomatology Special Consultation Clinic, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Wei
authors.affiliation: Department of Stomatology Special Consultation Clinic, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China.
authors.forename: Yi-feng
authors.initials: YF
authors.lastname: Huang
mesh_terms: D002858:Chromium Alloys / Q000737:chemistry*; D003722:Dental Alloys; D003776:Dental Porcelain; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D013696:Temperature
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; C047040:Vita VMK 68