Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS

Zeynep Ayguzer Yasar; Richard Haber

doi:doi:10.11648/j.ijmsa.20200901.12

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Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS

Zeynep Ayguzer Yasar, Richard Haber

Published in International Journal of Materials Science and Applications (Volume 9, Issue 1)

Received: 27 January 2020 Accepted: 12 February 2020 Published: 28 February 2020

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Abstract

In this current paper, oxygen content of a fine particle size SiC (H. C. Starck UF 25 Silicon Carbide) and coarser particle size SiC (Saint Gobain Silicon Carbide) were modified by using different concentrations of HF for etching. Fully dense silicon carbide ceramics (>99% th. density) were produced by the spark plasma sintering technique at 1950 °C under an applied pressure of 50 MPa for 5 min hold with boron carbide and carbon addition. Archimedes method, scanning electron microscopy, and the ultrasound analysis were used to examined density, microstructure, elastic (E), shear (G), and bulk (K) moduli of dense silicon carbide ceramics to investigate the effect of oxygen impurities on the densification and the properties of silicon carbide. The results showed that high oxygen content is detrimental to the final density of SPS silicon carbide. When the oxygen content increased from 0.60 to 5.92 wt.%, the relative density decreased from 99.99% to 96%. For both SiC powders, by increasing the etching time, the grain size of SiC decreased. It means that the high oxygen caused grain growth. Ultrasound analysis results showed that the high oxygen content affected the elastic properties. SiC samples with the high oxygen content had a lower elastic moduli, shear moduli and bulk moduli. It was clear that increasing the oxygen content decreased the elastic properties.

Published in	International Journal of Materials Science and Applications (Volume 9, Issue 1)
DOI	10.11648/j.ijmsa.20200901.12
Page(s)	7-13
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Silicon Carbide, Spark Plasma Sintering, Microstructure

References

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Zeynep Ayguzer Yasar, Richard Haber. (2020). Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS. International Journal of Materials Science and Applications, 9(1), 7-13. https://doi.org/10.11648/j.ijmsa.20200901.12

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ACS Style

Zeynep Ayguzer Yasar; Richard Haber. Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS. Int. J. Mater. Sci. Appl. 2020, 9(1), 7-13. doi: 10.11648/j.ijmsa.20200901.12

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AMA Style

Zeynep Ayguzer Yasar, Richard Haber. Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS. Int J Mater Sci Appl. 2020;9(1):7-13. doi: 10.11648/j.ijmsa.20200901.12

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@article{10.11648/j.ijmsa.20200901.12,
  author = {Zeynep Ayguzer Yasar and Richard Haber},
  title = {Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS},
  journal = {International Journal of Materials Science and Applications},
  volume = {9},
  number = {1},
  pages = {7-13},
  doi = {10.11648/j.ijmsa.20200901.12},
  url = {https://doi.org/10.11648/j.ijmsa.20200901.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20200901.12},
  abstract = {In this current paper, oxygen content of a fine particle size SiC (H. C. Starck UF 25 Silicon Carbide) and coarser particle size SiC (Saint Gobain Silicon Carbide) were modified by using different concentrations of HF for etching. Fully dense silicon carbide ceramics (>99% th. density) were produced by the spark plasma sintering technique at 1950 °C under an applied pressure of 50 MPa for 5 min hold with boron carbide and carbon addition. Archimedes method, scanning electron microscopy, and the ultrasound analysis were used to examined density, microstructure, elastic (E), shear (G), and bulk (K) moduli of dense silicon carbide ceramics to investigate the effect of oxygen impurities on the densification and the properties of silicon carbide. The results showed that high oxygen content is detrimental to the final density of SPS silicon carbide. When the oxygen content increased from 0.60 to 5.92 wt.%, the relative density decreased from 99.99% to 96%. For both SiC powders, by increasing the etching time, the grain size of SiC decreased. It means that the high oxygen caused grain growth. Ultrasound analysis results showed that the high oxygen content affected the elastic properties. SiC samples with the high oxygen content had a lower elastic moduli, shear moduli and bulk moduli. It was clear that increasing the oxygen content decreased the elastic properties.},
 year = {2020}
}

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TY - JOUR
T1 - Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS
AU - Zeynep Ayguzer Yasar
AU - Richard Haber
Y1 - 2020/02/28
PY - 2020
N1 - https://doi.org/10.11648/j.ijmsa.20200901.12
DO - 10.11648/j.ijmsa.20200901.12
T2 - International Journal of Materials Science and Applications
JF - International Journal of Materials Science and Applications
JO - International Journal of Materials Science and Applications
SP - 7
EP - 13
PB - Science Publishing Group
SN - 2327-2643
UR - https://doi.org/10.11648/j.ijmsa.20200901.12
AB - In this current paper, oxygen content of a fine particle size SiC (H. C. Starck UF 25 Silicon Carbide) and coarser particle size SiC (Saint Gobain Silicon Carbide) were modified by using different concentrations of HF for etching. Fully dense silicon carbide ceramics (>99% th. density) were produced by the spark plasma sintering technique at 1950 °C under an applied pressure of 50 MPa for 5 min hold with boron carbide and carbon addition. Archimedes method, scanning electron microscopy, and the ultrasound analysis were used to examined density, microstructure, elastic (E), shear (G), and bulk (K) moduli of dense silicon carbide ceramics to investigate the effect of oxygen impurities on the densification and the properties of silicon carbide. The results showed that high oxygen content is detrimental to the final density of SPS silicon carbide. When the oxygen content increased from 0.60 to 5.92 wt.%, the relative density decreased from 99.99% to 96%. For both SiC powders, by increasing the etching time, the grain size of SiC decreased. It means that the high oxygen caused grain growth. Ultrasound analysis results showed that the high oxygen content affected the elastic properties. SiC samples with the high oxygen content had a lower elastic moduli, shear moduli and bulk moduli. It was clear that increasing the oxygen content decreased the elastic properties.
VL - 9
IS - 1
ER -

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Author Information

Zeynep Ayguzer Yasar

Design, Osmanc?k Omerderindere Vocational School, Hitit University, Corum, Turkey
Richard Haber

Department of Material Science and Engineering, Rutgers, The State University of New Jersey, Piscataway, USA

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Zeynep Ayguzer Yasar, Richard Haber. (2020). Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS. International Journal of Materials Science and Applications, 9(1), 7-13. https://doi.org/10.11648/j.ijmsa.20200901.12

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ACS Style

Zeynep Ayguzer Yasar; Richard Haber. Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS. Int. J. Mater. Sci. Appl. 2020, 9(1), 7-13. doi: 10.11648/j.ijmsa.20200901.12

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AMA Style

Zeynep Ayguzer Yasar, Richard Haber. Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS. Int J Mater Sci Appl. 2020;9(1):7-13. doi: 10.11648/j.ijmsa.20200901.12

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@article{10.11648/j.ijmsa.20200901.12,
  author = {Zeynep Ayguzer Yasar and Richard Haber},
  title = {Effect of Acid Etching Time and Concentration on Oxygen Content of Powder on the Microstructure and Elastic Properties of Silicon Carbide Densified by SPS},
  journal = {International Journal of Materials Science and Applications},
  volume = {9},
  number = {1},
  pages = {7-13},
  doi = {10.11648/j.ijmsa.20200901.12},
  url = {https://doi.org/10.11648/j.ijmsa.20200901.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20200901.12},
  abstract = {In this current paper, oxygen content of a fine particle size SiC (H. C. Starck UF 25 Silicon Carbide) and coarser particle size SiC (Saint Gobain Silicon Carbide) were modified by using different concentrations of HF for etching. Fully dense silicon carbide ceramics (>99% th. density) were produced by the spark plasma sintering technique at 1950 °C under an applied pressure of 50 MPa for 5 min hold with boron carbide and carbon addition. Archimedes method, scanning electron microscopy, and the ultrasound analysis were used to examined density, microstructure, elastic (E), shear (G), and bulk (K) moduli of dense silicon carbide ceramics to investigate the effect of oxygen impurities on the densification and the properties of silicon carbide. The results showed that high oxygen content is detrimental to the final density of SPS silicon carbide. When the oxygen content increased from 0.60 to 5.92 wt.%, the relative density decreased from 99.99% to 96%. For both SiC powders, by increasing the etching time, the grain size of SiC decreased. It means that the high oxygen caused grain growth. Ultrasound analysis results showed that the high oxygen content affected the elastic properties. SiC samples with the high oxygen content had a lower elastic moduli, shear moduli and bulk moduli. It was clear that increasing the oxygen content decreased the elastic properties.},
 year = {2020}
}

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