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Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method
Cobalt–chromium–molybdenum alloys samples were obtained by the powder injection molding method (PIM). PIM is dedicated to the mass production of components and can manufacture several grades of dental screws, bolts, stabilizers, or implants. As a skeleton component, ethylene–vinyl acetate (EVA copol...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073040/ https://www.ncbi.nlm.nih.gov/pubmed/33923676 http://dx.doi.org/10.3390/ma14082010 |
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author | Matula, Grzegorz Szatkowska, Aleksandra Matus, Krzysztof Tomiczek, Błażej Pawlyta, Mirosława |
author_facet | Matula, Grzegorz Szatkowska, Aleksandra Matus, Krzysztof Tomiczek, Błażej Pawlyta, Mirosława |
author_sort | Matula, Grzegorz |
collection | PubMed |
description | Cobalt–chromium–molybdenum alloys samples were obtained by the powder injection molding method (PIM). PIM is dedicated to the mass production of components and can manufacture several grades of dental screws, bolts, stabilizers, or implants. As a skeleton component, ethylene–vinyl acetate (EVA copolymer) with a low temperature of processing and softening point was used. The choice of a low-temperature binder made it necessary to use a coarse ceramic powder as a mechanical support of the green sample during sintering. The injection-molded materials were thermally degraded in N(2) or Ar-5%H(2) and further sintered in N(2)-5%H(2) or Ar-5%H(2) at 1300 or 1350 °C for 30 min. The structure of the obtained samples was characterized by X-ray diffraction and electron microscopy. Mechanical properties, including hardness and three-point bending tests, confirmed that a nitrogen-rich atmosphere significantly increases the bending strength compared to the material manufactured in Ar-5%H(2). This is due to the precipitation of numerous fine nitrides and intermetallic phases that strengthen the ductile γ-phase matrix. |
format | Online Article Text |
id | pubmed-8073040 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-80730402021-04-27 Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method Matula, Grzegorz Szatkowska, Aleksandra Matus, Krzysztof Tomiczek, Błażej Pawlyta, Mirosława Materials (Basel) Article Cobalt–chromium–molybdenum alloys samples were obtained by the powder injection molding method (PIM). PIM is dedicated to the mass production of components and can manufacture several grades of dental screws, bolts, stabilizers, or implants. As a skeleton component, ethylene–vinyl acetate (EVA copolymer) with a low temperature of processing and softening point was used. The choice of a low-temperature binder made it necessary to use a coarse ceramic powder as a mechanical support of the green sample during sintering. The injection-molded materials were thermally degraded in N(2) or Ar-5%H(2) and further sintered in N(2)-5%H(2) or Ar-5%H(2) at 1300 or 1350 °C for 30 min. The structure of the obtained samples was characterized by X-ray diffraction and electron microscopy. Mechanical properties, including hardness and three-point bending tests, confirmed that a nitrogen-rich atmosphere significantly increases the bending strength compared to the material manufactured in Ar-5%H(2). This is due to the precipitation of numerous fine nitrides and intermetallic phases that strengthen the ductile γ-phase matrix. MDPI 2021-04-16 /pmc/articles/PMC8073040/ /pubmed/33923676 http://dx.doi.org/10.3390/ma14082010 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Matula, Grzegorz Szatkowska, Aleksandra Matus, Krzysztof Tomiczek, Błażej Pawlyta, Mirosława Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method |
title | Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method |
title_full | Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method |
title_fullStr | Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method |
title_full_unstemmed | Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method |
title_short | Structure and Properties of Co-Cr-Mo Alloy Manufactured by Powder Injection Molding Method |
title_sort | structure and properties of co-cr-mo alloy manufactured by powder injection molding method |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073040/ https://www.ncbi.nlm.nih.gov/pubmed/33923676 http://dx.doi.org/10.3390/ma14082010 |
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