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Wear resistance and fracture mechanics of WC–Co composites

  • Saleh Kaytbay and Medhat El-Hadek
Published/Copyright: June 1, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 6

Abstract

Manufacturing of WC–Co composites using the electroless precipitation method at different sintering temperatures of 1 100, 1 250, 1 350 and 1 500 °C was successfully achieved. The chemical composition of the investigated materials was 90 wt.% WC with 10 wt.% Co, and 80 wt.% WC with 20 wt.% Co. The specific density, densification, and Vickers microhardness measurements were found to increase with increased sintering temperature for both the WC–Co compositions. The composites of tungsten carbide with 10 wt.% Co had a higher specific density and Vickers microhardness measurements than those for the composites of tungsten carbide with 20 wt.% Co. Composites with WC-10 wt.% Co had better wear resistance. The stress–strain and transverse rupture strength increased monotonically with the increase in sintering temperatures, agreeing with the material hardness and wear resistance behavior. Fractographical scanning electron microscopy analysis of the fracture surface demonstrated a rough characteristic conical shape failure in the direction of the maximum shear stress. A proposed mechanism for the formation of the conical fracture surface under compression testing is presented.

Keywords: Cobalt tungsten carbide; Fracture mechanics; Wear resistance; Electroless precipitation; Sintering densification
*Correspondence address, Prof. Eng. Medhat Awad El-Hadek, Department of Production and Mechanical Design, Faculty of Engineering, Port Fouad 42523, Port-Said, Egypt, Tel.: +2 0100 827 1778, Fax: +2 066 3400 936, E-mail:

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Received: 2013-10-11
Accepted: 2013-12-17
Published Online: 2014-06-01
Published in Print: 2014-06-12

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111069
Keywords for this article
Cobalt tungsten carbide; Fracture mechanics; Wear resistance; Electroless precipitation; Sintering densification

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Thermodynamic modeling of the In–Pt–Sb system
  5. Classical controlled rolling of low C steels microalloyed with Ti and Mo
  6. Development of carbide intermetallic layer by electric discharge alloying on AISI-D2 tool steel and its wear resistance
  7. Comparison of fatigue crack growth rate of selective laser sintered RapidSteel via computational fracture mechanics
  8. Wear resistance and fracture mechanics of WC–Co composites
  9. Thermal expansion behavior of CNT/Ag nanocomposite
  10. Thermophysical properties of solid phase rhodium measured by the pulse calorimetry technique over a wide temperature range
  11. Influence of Co3O4 addition on the ionic conductivity and microstructural properties of yttria-stabilized zirconia (8YSZ)
  12. High-activity of Pd catalyst supported on antimony tin oxide for hydrogen peroxide electroreduction
  13. Investigation of low k interfacial layer characteristics of LaAlO3 thin films grown on Si (100)
  14. In-situ catalytic growth of MgAl2O4 spinel whiskers in MgO–C refractories
  15. Short Communications
  16. Preparation and characterization of boron nitride/carbon fiber composite with high specific surface area
  17. Crevice corrosion resistance of high alloyed materials in 3.5 % NaCl solution
  18. Effect of grain size on the microstructure and mechanical properties of Mg-4Y-3Nd-0.5Zr alloy
  19. People
  20. Professor Ulrich Martin on his 65th birthday
  21. DGM News
  22. DGM News
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