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Effect of intergranular phase chemistry on the sliding-wear resistance of pressureless liquid-phase-sintered α-SiC

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Title: Effect of intergranular phase chemistry on the sliding-wear resistance of pressureless liquid-phase-sintered α-SiC
Authors: Ciudad, E.1, Borrero-López, O.1, Rodríguez-Rojas, F.1, Ortiz, A.L. alortiz@unex.es, Guiberteau, F.1
Source: Journal of the European Ceramic Society. Feb2012, Vol. 32 Issue 2, p511-516. 6p.
Subjects: Sintering, Silicon carbide, Polycrystals, Ceramics, Isostatic pressing, Sliding friction
Abstract: Abstract: The effect was investigated of the intergranular phase chemistry on the sliding-wear resistance of pressureless liquid-phase-sintered (PLPS) α-SiC densified with 10vol.% 5Al2O3 +3RE2O3 (RE=La, Nd, or Yb) additives. It was found that the sliding-wear behaviour of these ceramics is similar to what is observed in other polycrystalline ceramics: initial mild, plasticity-controlled wear followed by severe, fracture-controlled wear, with a well-defined wear transition. Most importantly, the sliding-wear resistance of PLPS SiC is found to increase with decreasing size of the RE3+ cation in the rare-earth oxide additive, with a lower susceptibility to mild and severe wear and a delayed transition to severe wear. Underlying this effect is likely the hardening of the intergranular phase resulting from the increase in the field strength of the RE3+–O2− bonds as the size of the RE3+ cation decreases. Tailoring the intergranular phase chemistry via the selection of RE2O3 sintering additives with cations as small as possible thus emerges as a potentially interesting approach to improving the sliding-wear resistance of PLPS SiC ceramics. [Copyright &y& Elsevier]
Copyright of Journal of the European Ceramic Society 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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 67137523
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PubTypeId: academicJournal
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  Data: Effect of intergranular phase chemistry on the sliding-wear resistance of pressureless liquid-phase-sintered α-SiC
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  Data: <searchLink fieldCode="AR" term="%22Ciudad%2C+E%2E%22">Ciudad, E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Borrero-López%2C+O%2E%22">Borrero-López, O.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rodríguez-Rojas%2C+F%2E%22">Rodríguez-Rojas, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ortiz%2C+A%2EL%2E%22">Ortiz, A.L.</searchLink><i> alortiz@unex.es</i><br /><searchLink fieldCode="AR" term="%22Guiberteau%2C+F%2E%22">Guiberteau, F.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+European+Ceramic+Society%22">Journal of the European Ceramic Society</searchLink>. Feb2012, Vol. 32 Issue 2, p511-516. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Silicon+carbide%22">Silicon carbide</searchLink><br /><searchLink fieldCode="DE" term="%22Polycrystals%22">Polycrystals</searchLink><br /><searchLink fieldCode="DE" term="%22Ceramics%22">Ceramics</searchLink><br /><searchLink fieldCode="DE" term="%22Isostatic+pressing%22">Isostatic pressing</searchLink><br /><searchLink fieldCode="DE" term="%22Sliding+friction%22">Sliding friction</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The effect was investigated of the intergranular phase chemistry on the sliding-wear resistance of pressureless liquid-phase-sintered (PLPS) α-SiC densified with 10vol.% 5Al2O3 +3RE2O3 (RE=La, Nd, or Yb) additives. It was found that the sliding-wear behaviour of these ceramics is similar to what is observed in other polycrystalline ceramics: initial mild, plasticity-controlled wear followed by severe, fracture-controlled wear, with a well-defined wear transition. Most importantly, the sliding-wear resistance of PLPS SiC is found to increase with decreasing size of the RE3+ cation in the rare-earth oxide additive, with a lower susceptibility to mild and severe wear and a delayed transition to severe wear. Underlying this effect is likely the hardening of the intergranular phase resulting from the increase in the field strength of the RE3+–O2− bonds as the size of the RE3+ cation decreases. Tailoring the intergranular phase chemistry via the selection of RE2O3 sintering additives with cations as small as possible thus emerges as a potentially interesting approach to improving the sliding-wear resistance of PLPS SiC ceramics. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Journal of the European Ceramic Society 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.jeurceramsoc.2011.09.011
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        Text: English
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      – SubjectFull: Sintering
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      – SubjectFull: Silicon carbide
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      – SubjectFull: Polycrystals
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      – SubjectFull: Ceramics
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      – SubjectFull: Isostatic pressing
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      – SubjectFull: Sliding friction
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      – TitleFull: Effect of intergranular phase chemistry on the sliding-wear resistance of pressureless liquid-phase-sintered α-SiC
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              Text: Feb2012
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