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Effect of Consolidation Mechanism on the Properties of Nanostructured WC-6, 9, 12 wt%Co Hardmetals

[+] Author Affiliations
Tahar Laoui, Abbas Saeed Hakeem, Kachalla Abdullahi, Nouari Saheb, Nasser Al-Aqeeli

King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia

Paper No. IMECE2011-63643, pp. 667-674; 8 pages
doi:10.1115/IMECE2011-63643
From:
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 11: Nano and Micro Materials, Devices and Systems; Microsystems Integration
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5497-6
  • Copyright © 2011 by ASME

abstract

The development of nanostructured materials has been exploited in enormous applications nowadays owing to the remarkable properties possessed by these advanced materials. Among these materials are tungsten carbide (WC)-based alloys, which have been widely used in a range of industrial applications including cutting and drilling tools, wear resistant components in wire drawing, and wear resistant surfaces in various equipments and dies. These alloys are processed using a variety of techniques in which powder metallurgy has been widely adopted. The key challenge lies in retaining the nanostructure of WC-based powders after the consolidation stage that is used to obtain dense parts following powder metallurgy processing. In the present study, the densification parameters, microstructural development and mechanical behavior of WC containing 6, 9 and 12wt. %Co powders in the range of nanometer to micron size of WC particles were investigated. Two types of consolidation techniques were considered namely spark plasma sintering (SPS) and microwave sintering (MW) for a comparative analysis as well as to explore the suitable process that will minimize grain growth. The consolidated (sintered) samples were characterized by X-ray diffraction, scanning electron microscopy, and hardness measurement.

Copyright © 2011 by ASME

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