Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Surface Analysis of Ni-Cr and Co-Cr Alloys with Addition of Ti and Mo for Dental CAD/CAM Use

Ti 및 Mo 첨가에 따른 치과 CAD/CAM용 Ni-Cr 및 Co-Cr합금의 표면분석

  • Moon, Dae-Sun (Department of Dental Materials, College of Dentistry, Chosun University) ;
  • Choe, Han-Cheol (Department of Dental Materials, College of Dentistry, Chosun University)
  • 문대선 (조선대학교 치과대학 치과재료학교실) ;
  • 최한철 (조선대학교 치과대학 치과재료학교실)
  • Received : 2018.06.19
  • Accepted : 2018.06.26
  • Published : 2018.06.30
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Abstract

In this study, surface analysis of Ni-Cr and Co-Cr alloys with addition of Ti and Mo for dental CAD/CAM use has been researched experimentally. The surface characteristics of the alloys were examined by Vickers hardness test, bonding strength test, surface roughness test, field-emission scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction spectroscopy. The shrinkage of the sintered Ni-Cr alloy alloy was slightly larger than that of Ni-Cr-Ti alloy, and larger than Co-Cr alloy. Also, the addition of Mo showed a tendency to decrease shrinkage somewhat. From the result of XRD analysis, NiCr, $Ni_3Cr$ and $Ni_3Ti$ were observed in the sintered Ni-13Cr-xTi and Ni-13Cr-xMo alloys. In addition, ${\sigma}-CrCo$, $Co_2Mo_3$ and $TiCo_2$ were formed in the sintered Co-Cr-xTi and Co-Cr-xMo alloys. Surface hardness of Ti and Mo added alloy was higher than those of Ni-Cr and Co-Cr alloy. The bond strength between sintered alloy and porcelain was $16.1kgf/mm^2$ for Ni-13Cr alloy, $17.8kgf/mm^2$ for Ni-13Cr-5Ti alloy, and $8.2kgf/mm^2$ for Ni-13Cr-10Ti alloy, respectively.

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References

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