Wear resistance of Al2O3–CNT ceramic nanocomposites at room and high temperatures

Puchý, Viktor; Hvizdoš, Pavol; Dusza, Ján; Kováč, František; Inam, Fawad; Reece, Michael J.

doi:10.1016/j.ceramint.2012.12.100

Cited by 87 publications

(40 citation statements)

References 6 publications

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“…This is primarily due to the lubricant nature of carbon nanofillers which is responsible for deeper penetration on the Vickers indenter during the indentation. These observations for the hardness of nanocomposites are in consistent with the studies conducted by different groups [3,7,[37][38]. It is interesting to note that there is no significant difference in hardness for the different types of nanocomposites.…”

Section: Resultssupporting

confidence: 80%

Structural health monitoring capabilities in ceramic–carbon nanocomposites

Bhat

Daoush

2014

Ceramics International

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractA novel method for analysing structural health of alumina nanocomposites filled with graphene nanoplatelets (GNP), carbon nanotubes (CNTs) and carbon black nano-particles (CB) is presented. All nanocomposites were prepared using novel colloidal processing and then by Spark Plasma Sintering.Good homogeneous dispersion was observed for all carbon filled materials. Nanocomposite bars were indented to produce sub-surface damage. Change in electrical conductivities were analysed after indentation to understand structural damage. For correlating change in electrical conductivity and Page 2 of 15 indentation damage and understanding damage tolerance, mechanical properties were compared.Because of the systematically induced indentation damage, a sharp decrease of 86% was observed in the electrical conductivity of CNT nanocomposite as compared to 69% and 27% in the electrical conductivities of GNP nanocomposites and CB nanocomposites respectively. CNTs impart superior damage sensing capability in alumina nanocomposites, in comparison to GNP and CB, due to their fibrous nature, high aspect ratio and high electrical conductivity.

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Section: Resultssupporting

confidence: 80%

Structural health monitoring capabilities in ceramic–carbon nanocomposites

Bhat

Daoush

2014

Ceramics International

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“…The favorable effects of CNTs on tribological behavior of nanocomposites depend on their excellent mechanical properties, dispersion quality in the nanocomposite and the reinforcement efficiency of CNTs. This phenomenon describe by V. Puchy et al [13], during the wear process, laminated oxide films form at the contact surfaces that they subsequently break up and flake off due to low adhesion between the oxide films and the matrix. At the same time, the oxide particles formed at the contact surface are harder than that of the matrix and are able to increase the abrasive wear.…”

Section: Hardness and Wear Resistance Of Nanocomposite Coatingmentioning

confidence: 94%

“…Those solid lubricating films significantly reduce the adhesive wear caused by oxide particles compared to the unreinforced alumina. The coefficient of friction of alumina-CNT nanocomposites is approximately three times lower in comparison to the alumina monolithic material due to the lubricating effect of carbonnanotubes during sliding [13].…”

Section: Hardness and Wear Resistance Of Nanocomposite Coatingmentioning

confidence: 99%

Wear Resistance and Surface Hardness of Carbon Nanotube Reinforced Alumina Matrix Nanocomposite by Cold Sprayed Process

Winarto

Priadi

Sofyan

et al. 2017

Procedia Engineering

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Carbon nanotube reinforced alumina matrix nanocomposite was fabricated by cold spray process on Al-Si alloys surfaces. The effects of various amounts of CNTs from 0, 2 and 4 wt % on alumina powders were investigated. Results show that the improvement in both wear resistance and hardness was provided by 2 wt. % CNTs reinforcement. The hardness of carbon nanotube reinforced alumina matrix nanocomposite was increased due to an enhanced load sharing of homogeneously distributed carbon nanotubes. Homogeneous distribution of CNTs within the Al 2 O 3 matrix and strong interfacial connection between CNTs-Al 2 O 3 give nanocomposites with superior wear properties.

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“…Yamamoto et al observed that the steady-state friction coefficient decreased from 0.57 to 0.33 when a 4 wt% CNTs was added to the alumina matrix [14]. More recently, a wear resistance study of CNTs/Al 2 O 3 composites has been reported where the incorporation of a 5% of CNTs leads to an improvement of the mechanical properties along with the decrease up to three times of the friction coefficient [15].…”

Section: Introductionmentioning

confidence: 96%