Table of Contents
Indian Journal of Materials Science
Volume 2013 (2013), Article ID 603791, 7 pages
http://dx.doi.org/10.1155/2013/603791
Research Article

Effect of Heating Mode and Copper Content on the Densification of W-Cu Alloys

1NTPC Energy Technology Research Alliance (NETRA), NTPC Ltd., E-III, Echotech-2, Greater Noida 201308, India
2Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur 208016, India
3Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA

Received 18 June 2013; Accepted 13 July 2013

Academic Editors: D. Das and Y. Ge

Copyright © 2013 Avijit Mondal et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study investigates the effect of heating mode on the sintering of tungsten-copper alloys containing up to 30 wt.% Cu. The sinterability of the W-Cu system consolidated in a 2.45 GHz multimode microwave furnace has been critically compared with that processed in a radiatively heated (conventional) furnace. The as-pressed W-Cu alloys can be readily sintered in microwave furnace with substantial (sixfold) reduction in the processing time. As compared to conventional sintering, microwave processing results in greater densification, more homogenous distribution of the binder phase, and smaller tungsten grain size. The densification in compacts increases with increasing Cu content. For all compositions, the electrical conductivity and hardness of microwave sintered W-Cu alloys are higher than those of their conventionally sintered counterparts. This study investigates the effect of heating mode on the sintering of tungsten-copper alloys containing up to 30 wt.% Cu. The W-Cu alloys were sintered in a 2.45 GHz microwave furnace with substantial (sixfold) reduction in the processing time. As compared to conventional sintering, microwave processing results in greater densification, more homogenous distribution of the binder phase, and smaller tungsten grain size. This results in higher electrical conductivity and hardness of the microwave sintered W-Cu alloys.