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Compressive properties of pristine and SiC-Te-added MgB2 powders, green compacts and spark-plasma-sintered bulks.

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Title: Compressive properties of pristine and SiC-Te-added MgB2 powders, green compacts and spark-plasma-sintered bulks.
Authors: Badica, Petre1 badica2003@yahoo.com, Batalu, Dan2, Burdusel, Mihail1, Grigoroscuta, Mihai A.1,2, Aldica, Gheorghe V.1, Enculescu, Monica1, Gabor, Raluca A.3, Wang, Zhiyong4, Huang, Ruoxuan4, Li, Peifeng4,5
Source: Ceramics International. Jun2018, Vol. 44 Issue 9, p10181-10191. 11p.
Subjects: Silicon carbide, Sintering, Quasistatic processes, Cyclic loads, X-ray diffraction
Abstract: Pristine and (SiC+Te)-added MgB 2 powders, green and spark plasma sintered (SPS) compacts were investigated from the viewpoint of quasi-static and dynamic (Split-Hopkinson Pressure Bar, SHPB) compressive mechanical properties The amount of the additive (SiC+Te) was selected to be the optimum one for maximization of the superconducting functional parameters. Pristine and added MgB 2 show very similar compressive parameters (tan δ, fracture strength, Vickers hardness, others) and fragment size in the SHPB test. However, for the bulk SPSed samples the ratio of intergranular to transgranular fracturing changes, the first one being stronger in the added sample. This is reflected in the quasi-static K IC that is higher for the added sample. Despite this result, sintered samples are brittle and have roughly similar fragmentation behavior as for brittle engineering ceramics. In the fragmentation process, the composite nature of our samples should be considered with a special focus on MgB 2 blocks (colonies) that show the major contribution to fracturing. The Glenn-Chudnovsky model of fracturing under dynamic load provides the closest values to our experimental fragment size data. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 129073587
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  Label: Title
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  Data: Compressive properties of pristine and SiC-Te-added MgB2 powders, green compacts and spark-plasma-sintered bulks.
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  Data: <searchLink fieldCode="AR" term="%22Badica%2C+Petre%22">Badica, Petre</searchLink><relatesTo>1</relatesTo><i> badica2003@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Batalu%2C+Dan%22">Batalu, Dan</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Burdusel%2C+Mihail%22">Burdusel, Mihail</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Grigoroscuta%2C+Mihai+A%2E%22">Grigoroscuta, Mihai A.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Aldica%2C+Gheorghe+V%2E%22">Aldica, Gheorghe V.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Enculescu%2C+Monica%22">Enculescu, Monica</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gabor%2C+Raluca+A%2E%22">Gabor, Raluca A.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhiyong%22">Wang, Zhiyong</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Huang%2C+Ruoxuan%22">Huang, Ruoxuan</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Peifeng%22">Li, Peifeng</searchLink><relatesTo>4,5</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Jun2018, Vol. 44 Issue 9, p10181-10191. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Silicon+carbide%22">Silicon carbide</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Quasistatic+processes%22">Quasistatic processes</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclic+loads%22">Cyclic loads</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Pristine and (SiC+Te)-added MgB 2 powders, green and spark plasma sintered (SPS) compacts were investigated from the viewpoint of quasi-static and dynamic (Split-Hopkinson Pressure Bar, SHPB) compressive mechanical properties The amount of the additive (SiC+Te) was selected to be the optimum one for maximization of the superconducting functional parameters. Pristine and added MgB 2 show very similar compressive parameters (tan δ, fracture strength, Vickers hardness, others) and fragment size in the SHPB test. However, for the bulk SPSed samples the ratio of intergranular to transgranular fracturing changes, the first one being stronger in the added sample. This is reflected in the quasi-static K IC that is higher for the added sample. Despite this result, sintered samples are brittle and have roughly similar fragmentation behavior as for brittle engineering ceramics. In the fragmentation process, the composite nature of our samples should be considered with a special focus on MgB 2 blocks (colonies) that show the major contribution to fracturing. The Glenn-Chudnovsky model of fracturing under dynamic load provides the closest values to our experimental fragment size data. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.ceramint.2018.03.008
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        Type: general
      – SubjectFull: Sintering
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      – SubjectFull: Quasistatic processes
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              Text: Jun2018
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