Synthesis and Multi Scale Tribological Behavior of WC-Co/Nanodiamond Nanocomposites

Andy Nieto, Lin Jiang, Jaekang Kim, Dae Eun Kim, Julie M. Schoenung

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nanodiamonds (ND) present a unique combination of desirable mechanical, functional, and chemical characteristics that are ideally suited for reinforcing and enhancing the wear resistance of carbide based materials. Tungsten carbide cobalt (WC-Co) matrix nanocomposites reinforced with varying amounts of ND (2 - 10 vol.%) were synthesized here by spark plasma sintering. The rapid thermal consolidation route enabled attainment of dense samples with a significant retention of the metastable diamond phase. NDs affected the microstructural evolution, chemistry, and mechanical properties of WC-Co. Macroscale reciprocating pin-on-disk tests were conducted to assess wear behavior under conditions relevant to service environments, e.g., high cycles and high contact pressure. Microscale tribological properties were assessed using microscratch tests in order to investigate the intrinsic effects of ND on the localized mechanical and tribological response of WC-Co-ND composites. The incorporation of 10 vol.% ND enhanced wear resistance at both the micro- and macroscale, by 28% and 35%, respectively.

Original languageEnglish
Article number7060
JournalScientific reports
Volume7
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

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Nanodiamonds
Nanocomposites
Wear resistance
Spark plasma sintering
Tungsten carbide
Microstructural evolution
Consolidation
Carbides
Cobalt
Diamonds
Wear of materials
Mechanical properties
Composite materials

All Science Journal Classification (ASJC) codes

  • General

Cite this

Nieto, Andy ; Jiang, Lin ; Kim, Jaekang ; Kim, Dae Eun ; Schoenung, Julie M. / Synthesis and Multi Scale Tribological Behavior of WC-Co/Nanodiamond Nanocomposites. In: Scientific reports. 2017 ; Vol. 7, No. 1.
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abstract = "Nanodiamonds (ND) present a unique combination of desirable mechanical, functional, and chemical characteristics that are ideally suited for reinforcing and enhancing the wear resistance of carbide based materials. Tungsten carbide cobalt (WC-Co) matrix nanocomposites reinforced with varying amounts of ND (2 - 10 vol.{\%}) were synthesized here by spark plasma sintering. The rapid thermal consolidation route enabled attainment of dense samples with a significant retention of the metastable diamond phase. NDs affected the microstructural evolution, chemistry, and mechanical properties of WC-Co. Macroscale reciprocating pin-on-disk tests were conducted to assess wear behavior under conditions relevant to service environments, e.g., high cycles and high contact pressure. Microscale tribological properties were assessed using microscratch tests in order to investigate the intrinsic effects of ND on the localized mechanical and tribological response of WC-Co-ND composites. The incorporation of 10 vol.{\%} ND enhanced wear resistance at both the micro- and macroscale, by 28{\%} and 35{\%}, respectively.",
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Synthesis and Multi Scale Tribological Behavior of WC-Co/Nanodiamond Nanocomposites. / Nieto, Andy; Jiang, Lin; Kim, Jaekang; Kim, Dae Eun; Schoenung, Julie M.

In: Scientific reports, Vol. 7, No. 1, 7060, 01.12.2017.

Research output: Contribution to journalArticle

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AU - Kim, Jaekang

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AU - Schoenung, Julie M.

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AB - Nanodiamonds (ND) present a unique combination of desirable mechanical, functional, and chemical characteristics that are ideally suited for reinforcing and enhancing the wear resistance of carbide based materials. Tungsten carbide cobalt (WC-Co) matrix nanocomposites reinforced with varying amounts of ND (2 - 10 vol.%) were synthesized here by spark plasma sintering. The rapid thermal consolidation route enabled attainment of dense samples with a significant retention of the metastable diamond phase. NDs affected the microstructural evolution, chemistry, and mechanical properties of WC-Co. Macroscale reciprocating pin-on-disk tests were conducted to assess wear behavior under conditions relevant to service environments, e.g., high cycles and high contact pressure. Microscale tribological properties were assessed using microscratch tests in order to investigate the intrinsic effects of ND on the localized mechanical and tribological response of WC-Co-ND composites. The incorporation of 10 vol.% ND enhanced wear resistance at both the micro- and macroscale, by 28% and 35%, respectively.

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