Microstructure and tribological properties of pulsed electric current sintered alumina-zirconia nanocomposites with different solid lubricants

M. Erkin Cura (Corresponding Author), S.-H. Kim, Tatu Muukkonen, Simo Varjus, Antti Vaajoki, O. Söderberg, Tomi Suhonen, Ulla Kanerva, S. Wohn Lee, S.-P. Hannula

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

Dense Al2O3-15 wt% (ZrO2-3 mol%Y2O3) nanocomposites modified with 3 wt% of self-lubricating component (CaF2, BaF2, MoS2, WS2, h-BN, or graphite) were consolidated by pulsed electric current sintering. Their microstructure as well as mechanical and tribological properties were evaluated. During consolidation composition of the self-lubricating components was conserved except for BaF2, which partially melted. The Al2O3/ZrO2(3 mol%Y2O3) matrix showed hardness of 20.35 GPa and Young’s modulus of 320 GPa determined by Vickers indentation. All solid lubricant additives led to a decrease in hardness of the composite. Solid lubricant additives lowered the coefficient of friction (CoF) against alumina at room temperature. In pin-on-disc tests CoF of 0.38–0.42 was measured for all the materials against alumina ball. The lowest CoF of 0.043 was measured for Al2O3/ZrO2(3 mol%Y2O3)/CaF2 in the scratch test against diamond stylus while the matrix material showed lower friction than other materials. The measured wear rates were in the order of 10−12 for Al2O3/ZrO2(3 mol%Y2O3)/CaF2, Al2O3/ZrO2(3 mol%Y2O3)/MoS2, and Al2O3/ZrO2(3 mol%Y2O3)/WS2.
Original languageEnglish
Pages (from-to)2093-2105
Number of pages13
JournalCeramics International
Volume39
Issue number2
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Sintered alumina
Solid lubricants
Electric currents
Zirconia
Nanocomposites
Friction
Microstructure
Aluminum Oxide
Alumina
Hardness
Diamond
Spark plasma sintering
Graphite
Indentation
Consolidation
Diamonds
Elastic moduli
Wear of materials
zirconium oxide
Composite materials

Keywords

  • Nanocomposites
  • mechanical propetries
  • Al 2O 3
  • pulsed electric current sintering
  • ProperPart
  • ProperTune

Cite this

Erkin Cura, M. ; Kim, S.-H. ; Muukkonen, Tatu ; Varjus, Simo ; Vaajoki, Antti ; Söderberg, O. ; Suhonen, Tomi ; Kanerva, Ulla ; Wohn Lee, S. ; Hannula, S.-P. / Microstructure and tribological properties of pulsed electric current sintered alumina-zirconia nanocomposites with different solid lubricants. In: Ceramics International. 2013 ; Vol. 39, No. 2. pp. 2093-2105.
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title = "Microstructure and tribological properties of pulsed electric current sintered alumina-zirconia nanocomposites with different solid lubricants",
abstract = "Dense Al2O3-15 wt{\%} (ZrO2-3 mol{\%}Y2O3) nanocomposites modified with 3 wt{\%} of self-lubricating component (CaF2, BaF2, MoS2, WS2, h-BN, or graphite) were consolidated by pulsed electric current sintering. Their microstructure as well as mechanical and tribological properties were evaluated. During consolidation composition of the self-lubricating components was conserved except for BaF2, which partially melted. The Al2O3/ZrO2(3 mol{\%}Y2O3) matrix showed hardness of 20.35 GPa and Young’s modulus of 320 GPa determined by Vickers indentation. All solid lubricant additives led to a decrease in hardness of the composite. Solid lubricant additives lowered the coefficient of friction (CoF) against alumina at room temperature. In pin-on-disc tests CoF of 0.38–0.42 was measured for all the materials against alumina ball. The lowest CoF of 0.043 was measured for Al2O3/ZrO2(3 mol{\%}Y2O3)/CaF2 in the scratch test against diamond stylus while the matrix material showed lower friction than other materials. The measured wear rates were in the order of 10−12 for Al2O3/ZrO2(3 mol{\%}Y2O3)/CaF2, Al2O3/ZrO2(3 mol{\%}Y2O3)/MoS2, and Al2O3/ZrO2(3 mol{\%}Y2O3)/WS2.",
keywords = "Nanocomposites, mechanical propetries, Al 2O 3, pulsed electric current sintering, ProperPart, ProperTune",
author = "{Erkin Cura}, M. and S.-H. Kim and Tatu Muukkonen and Simo Varjus and Antti Vaajoki and O. S{\"o}derberg and Tomi Suhonen and Ulla Kanerva and {Wohn Lee}, S. and S.-P. Hannula",
year = "2013",
doi = "10.1016/j.ceramint.2012.08.065",
language = "English",
volume = "39",
pages = "2093--2105",
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Microstructure and tribological properties of pulsed electric current sintered alumina-zirconia nanocomposites with different solid lubricants. / Erkin Cura, M. (Corresponding Author); Kim, S.-H.; Muukkonen, Tatu; Varjus, Simo; Vaajoki, Antti; Söderberg, O.; Suhonen, Tomi; Kanerva, Ulla; Wohn Lee, S.; Hannula, S.-P.

In: Ceramics International, Vol. 39, No. 2, 2013, p. 2093-2105.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Microstructure and tribological properties of pulsed electric current sintered alumina-zirconia nanocomposites with different solid lubricants

AU - Erkin Cura, M.

AU - Kim, S.-H.

AU - Muukkonen, Tatu

AU - Varjus, Simo

AU - Vaajoki, Antti

AU - Söderberg, O.

AU - Suhonen, Tomi

AU - Kanerva, Ulla

AU - Wohn Lee, S.

AU - Hannula, S.-P.

PY - 2013

Y1 - 2013

N2 - Dense Al2O3-15 wt% (ZrO2-3 mol%Y2O3) nanocomposites modified with 3 wt% of self-lubricating component (CaF2, BaF2, MoS2, WS2, h-BN, or graphite) were consolidated by pulsed electric current sintering. Their microstructure as well as mechanical and tribological properties were evaluated. During consolidation composition of the self-lubricating components was conserved except for BaF2, which partially melted. The Al2O3/ZrO2(3 mol%Y2O3) matrix showed hardness of 20.35 GPa and Young’s modulus of 320 GPa determined by Vickers indentation. All solid lubricant additives led to a decrease in hardness of the composite. Solid lubricant additives lowered the coefficient of friction (CoF) against alumina at room temperature. In pin-on-disc tests CoF of 0.38–0.42 was measured for all the materials against alumina ball. The lowest CoF of 0.043 was measured for Al2O3/ZrO2(3 mol%Y2O3)/CaF2 in the scratch test against diamond stylus while the matrix material showed lower friction than other materials. The measured wear rates were in the order of 10−12 for Al2O3/ZrO2(3 mol%Y2O3)/CaF2, Al2O3/ZrO2(3 mol%Y2O3)/MoS2, and Al2O3/ZrO2(3 mol%Y2O3)/WS2.

AB - Dense Al2O3-15 wt% (ZrO2-3 mol%Y2O3) nanocomposites modified with 3 wt% of self-lubricating component (CaF2, BaF2, MoS2, WS2, h-BN, or graphite) were consolidated by pulsed electric current sintering. Their microstructure as well as mechanical and tribological properties were evaluated. During consolidation composition of the self-lubricating components was conserved except for BaF2, which partially melted. The Al2O3/ZrO2(3 mol%Y2O3) matrix showed hardness of 20.35 GPa and Young’s modulus of 320 GPa determined by Vickers indentation. All solid lubricant additives led to a decrease in hardness of the composite. Solid lubricant additives lowered the coefficient of friction (CoF) against alumina at room temperature. In pin-on-disc tests CoF of 0.38–0.42 was measured for all the materials against alumina ball. The lowest CoF of 0.043 was measured for Al2O3/ZrO2(3 mol%Y2O3)/CaF2 in the scratch test against diamond stylus while the matrix material showed lower friction than other materials. The measured wear rates were in the order of 10−12 for Al2O3/ZrO2(3 mol%Y2O3)/CaF2, Al2O3/ZrO2(3 mol%Y2O3)/MoS2, and Al2O3/ZrO2(3 mol%Y2O3)/WS2.

KW - Nanocomposites

KW - mechanical propetries

KW - Al 2O 3

KW - pulsed electric current sintering

KW - ProperPart

KW - ProperTune

U2 - 10.1016/j.ceramint.2012.08.065

DO - 10.1016/j.ceramint.2012.08.065

M3 - Article

VL - 39

SP - 2093

EP - 2105

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 2

ER -