Shanghai Journal of Stomatology ›› 2015, Vol. 24 ›› Issue (6): 687-689.

• Basic study • Previous Articles     Next Articles

The measurement of thermal expansion coefficient of Co-Cr alloy fabricated by selective laser melting

TIAN Xiao-mei, ZENG Li, WEI Bin, HUANG Yi-feng.   

  1. 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
  • Received:2015-05-10 Online:2015-12-25 Published:2016-01-04
  • Contact: 上海市科学技术委员会资助项目(12441903001,13140902701)

Abstract: PURPOSE 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℃ 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℃ to 500℃ and 600℃. RESULTS The 9 groups thermal expansion coefficient values of Co-Cr alloy heated from 20℃ to 500℃ 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℃ to 600℃, 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.

Key words: Selective laser melting (SLM), Co-Cr alloy, Thermal expansion coefficien

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