Xiaoyong Zhu Author
Subjects of specialization
Affiliation
W?Nb/TiC composites; Conventional sintering; (Nb, Ti)C; Nb2C; Impact energy
School of Materials Science and Engineering, Hefei University of Technology, Hefei, China
Xiaoyong Zhu is working in the School of Materials Science and Engineering, Hefei University of Technology, Hefei, China Influence of Niobium Content on The Microstructure and Properties of W–Nb/TiC Composites Prepared by Conventional Sintering
Research Article Subscription
Author(s): Laima Luo, Jingbo Chen, Shuang Wang, Guangnan Luo, Xiaoyong Zhu, Jigui Cheng, Yucheng Wu
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 micr... view more»