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http://dx.doi.org/10.5695/JKISE.2018.51.3.139

Surface Analysis of Ni-Cr and Co-Cr Alloys with Addition of Ti and Mo for Dental CAD/CAM Use  

Moon, Dae-Sun (Department of Dental Materials, College of Dentistry, Chosun University)
Choe, Han-Cheol (Department of Dental Materials, College of Dentistry, Chosun University)
Publication Information
Journal of the Korean institute of surface engineering / v.51, no.3, 2018 , pp. 139-148 More about this Journal
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.
Keywords
Dental alloy; Porcelain bonding strength; Sintered Ni-13Cr alloy; Sintered Co-30Cr alloy;
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Times Cited By KSCI : 3  (Citation Analysis)
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