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Hot pressed silicon carbide (SiC) composites prepared with 0, 10, 30 or 50 wt% tungsten carbide (WC) are subjected to dry sliding wear against WC-Co and steel ball. In particular an attempt has been made to answer the following important questions: (i) How does the load (from 5 to 20 N) effect sliding wear behaviour of SiC-ceramics against WC-Co and steel counterbodies? (ii) Is there any effect of WC content on friction and wear characteristics of SiC ceramics? (iii) Does the dominant material removal mechanism of SiC ceramics change with the addition of WC or counterbody? (iv) What is the influence of mechanical properties on the sliding wear? Experimental results indicated that coefficient of friction (COF) for the SiC ceramics varied between 0.66 and 0.33 with change in load and counterbodies. Wear volume for SiC ceramics found approximately 6−10 times more against WC-Co as compared against steel. Wear volume changes from 2.0 × 10-3 mm3 to 1.2 × 10-2 mm3 with change in counterbodies for SiC-(10, 30 or 50 wt%) WC composite at 20 N. SiC ceramics indicated abrasion and composites reveal tribochemical wear as major material removal mechanisms. Wear is influenced by the hardness of counterbody and fracture toughness of SiC-WC composites.


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Tribology of WC reinforced SiC ceramics: Influence of counterbody

Show Author's information Sandan Kumar SHARMA1B. Venkata MANOJ KUMAR1( )Young-Wook KIM2
Department of Metallurgical and Materials Engineering, Indian Institute of Technology (IIT) Roorkee, Roorkee 247667, India
TriboCeramics Laboratory, Department of Materials Science and Engineering, the University of Seoul, Seoul 130743, Republic of Korea

Abstract

Hot pressed silicon carbide (SiC) composites prepared with 0, 10, 30 or 50 wt% tungsten carbide (WC) are subjected to dry sliding wear against WC-Co and steel ball. In particular an attempt has been made to answer the following important questions: (i) How does the load (from 5 to 20 N) effect sliding wear behaviour of SiC-ceramics against WC-Co and steel counterbodies? (ii) Is there any effect of WC content on friction and wear characteristics of SiC ceramics? (iii) Does the dominant material removal mechanism of SiC ceramics change with the addition of WC or counterbody? (iv) What is the influence of mechanical properties on the sliding wear? Experimental results indicated that coefficient of friction (COF) for the SiC ceramics varied between 0.66 and 0.33 with change in load and counterbodies. Wear volume for SiC ceramics found approximately 6−10 times more against WC-Co as compared against steel. Wear volume changes from 2.0 × 10-3 mm3 to 1.2 × 10-2 mm3 with change in counterbodies for SiC-(10, 30 or 50 wt%) WC composite at 20 N. SiC ceramics indicated abrasion and composites reveal tribochemical wear as major material removal mechanisms. Wear is influenced by the hardness of counterbody and fracture toughness of SiC-WC composites.

Keywords: composites, sliding wear, silicon carbide, tungsten carbide, steel, counterbody

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Publication history

Received: 23 June 2017
Revised: 04 August 2017
Accepted: 28 September 2017
Published: 16 March 2018
Issue date: April 2019

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© The author(s) 2017

Acknowledgements

B.V. Manoj Kumar acknowledges partial support from Council of Scientific and Industrial Research (CSIR), New Delhi, India through project No. 22(0654)/14/ EMR-II. Young-Wook Kim acknowledges partial support from a National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT & Future Planning (Grant number: 2016K1A3A1A19945992).

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