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Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques

The microstructures and mechanical properties of cobalt-chromium (Co-Cr) alloys produced by three CAD/CAM-based processing techniques were investigated in comparison with those produced by the traditional casting technique. Four groups of disc- (microstructures) or dumbbell- (mechanical properties)...

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Autores principales: Kim, Hae Ri, Jang, Seong-Ho, Kim, Young Kyung, Son, Jun Sik, Min, Bong Ki, Kim, Kyo-Han, Kwon, Tae-Yub
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456947/
https://www.ncbi.nlm.nih.gov/pubmed/28773718
http://dx.doi.org/10.3390/ma9070596
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author Kim, Hae Ri
Jang, Seong-Ho
Kim, Young Kyung
Son, Jun Sik
Min, Bong Ki
Kim, Kyo-Han
Kwon, Tae-Yub
author_facet Kim, Hae Ri
Jang, Seong-Ho
Kim, Young Kyung
Son, Jun Sik
Min, Bong Ki
Kim, Kyo-Han
Kwon, Tae-Yub
author_sort Kim, Hae Ri
collection PubMed
description The microstructures and mechanical properties of cobalt-chromium (Co-Cr) alloys produced by three CAD/CAM-based processing techniques were investigated in comparison with those produced by the traditional casting technique. Four groups of disc- (microstructures) or dumbbell- (mechanical properties) specimens made of Co-Cr alloys were prepared using casting (CS), milling (ML), selective laser melting (SLM), and milling/post-sintering (ML/PS). For each technique, the corresponding commercial alloy material was used. The microstructures of the specimens were evaluated via X-ray diffractometry, optical and scanning electron microscopy with energy-dispersive X-ray spectroscopy, and electron backscattered diffraction pattern analysis. The mechanical properties were evaluated using a tensile test according to ISO 22674 (n = 6). The microstructure of the alloys was strongly influenced by the manufacturing processes. Overall, the SLM group showed superior mechanical properties, the ML/PS group being nearly comparable. The mechanical properties of the ML group were inferior to those of the CS group. The microstructures and mechanical properties of Co-Cr alloys were greatly dependent on the manufacturing technique as well as the chemical composition. The SLM and ML/PS techniques may be considered promising alternatives to the Co-Cr alloy casting process.
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spelling pubmed-54569472017-07-28 Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques Kim, Hae Ri Jang, Seong-Ho Kim, Young Kyung Son, Jun Sik Min, Bong Ki Kim, Kyo-Han Kwon, Tae-Yub Materials (Basel) Article The microstructures and mechanical properties of cobalt-chromium (Co-Cr) alloys produced by three CAD/CAM-based processing techniques were investigated in comparison with those produced by the traditional casting technique. Four groups of disc- (microstructures) or dumbbell- (mechanical properties) specimens made of Co-Cr alloys were prepared using casting (CS), milling (ML), selective laser melting (SLM), and milling/post-sintering (ML/PS). For each technique, the corresponding commercial alloy material was used. The microstructures of the specimens were evaluated via X-ray diffractometry, optical and scanning electron microscopy with energy-dispersive X-ray spectroscopy, and electron backscattered diffraction pattern analysis. The mechanical properties were evaluated using a tensile test according to ISO 22674 (n = 6). The microstructure of the alloys was strongly influenced by the manufacturing processes. Overall, the SLM group showed superior mechanical properties, the ML/PS group being nearly comparable. The mechanical properties of the ML group were inferior to those of the CS group. The microstructures and mechanical properties of Co-Cr alloys were greatly dependent on the manufacturing technique as well as the chemical composition. The SLM and ML/PS techniques may be considered promising alternatives to the Co-Cr alloy casting process. MDPI 2016-07-20 /pmc/articles/PMC5456947/ /pubmed/28773718 http://dx.doi.org/10.3390/ma9070596 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kim, Hae Ri
Jang, Seong-Ho
Kim, Young Kyung
Son, Jun Sik
Min, Bong Ki
Kim, Kyo-Han
Kwon, Tae-Yub
Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques
title Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques
title_full Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques
title_fullStr Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques
title_full_unstemmed Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques
title_short Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques
title_sort microstructures and mechanical properties of co-cr dental alloys fabricated by three cad/cam-based processing techniques
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456947/
https://www.ncbi.nlm.nih.gov/pubmed/28773718
http://dx.doi.org/10.3390/ma9070596
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