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Hindi Research Article, J Nucl Ene Sci Power Generat Technol Vol: 5 Issue: 4
Influence of Niobium Content on The Microstructure and Properties of W–Nb/TiC Composites Prepared by Conventional Sintering
| Laima Luo1,3*, Jingbo Chen1, Shuang Wang1, Guangnan Luo2, Xiaoyong Zhu1,3, Jigui Cheng1,3 and Yucheng Wu1,3 | |
| 1School of Materials Science and Engineering, Hefei University of Technology, Hefei, China | |
| 2Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China | |
| 3National–Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei, China | |
| Corresponding author : Laima Luo
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China Tel: +86 551 62901012 E-mail: luolaima@126.com |
|
| Received: April 18, 2016 Accepted: June 03, 2016 Published: June 07, 2016 | |
| Citation: Luo L, Chen J, Wang S, Luo G, Zhu X, et al. (2016) Influence of Niobium Content on the Microstructure and Properties of W–Nb/TiC Composites Prepared by Conventional Sintering. J Nucl Ene Sci Power Generat Technol 5:4. doi:10.4172/2325-9809.1000157 |
Abstract
W–Nb/TiC composites were prepared by mechanical milling and conventional sintering. Field-emission scanning electron microscopy, high-resolution transmission electron microscopy, microhardness, and Charpy impact test analyses were used to characterize the samples. Results showed that W–1wt%Nb/TiC exhibited the maximum relative density (94%) and impact energy (116 KJ/m2) and that (Nb, Ti) C solid solution and Nb2C formed in the W–Nb/TiC composites. However, the density and impact energy decreased when the Nb content exceeded 1 wt% because the second-phase particles agglomerated at the grain boundaries (GBs) with increased Nb content. This agglomeration caused stress concentration of the GBs, which easily initiated cracks. The microhardness did not change significantly with the increased Nb content of the W–Nb/TiC composites.
