Effect of V content on the microstructure and mechanical properties of Mo{sub 2}FeB{sub 2} based cermets Yu, Haizhou [College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)]; College of Mechanical and Materials Engineering, China Three Gorges University, Yichang 443002 (China)]; Zheng, Yong [College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)]; State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074 (China)]; Liu, Wenjun [College of Mechanical and Materials Engineering, China Three Gorges University, Yichang 443002 (China)]; Zheng, Jianzhi [College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)]; Xiong, Weihao [State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074 (China)] 36 MATERIALS SCIENCE; ALLOYS; CERAMICS; CERMETS; FRACTURE PROPERTIES; GRAIN SIZE; HARDNESS; SCANNING ELECTRON MICROSCOPY; X RADIATION; X-RAY DIFFRACTION Four series of cermets with V content between 0 and 7.5 wt.% in 2.5 wt.% increments were studied by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffractometry (XRD). The transverse rupture strength (TRS), hardness (HRA) and fracture toughness (K{sub IC}) were also measured. It was found that the grain size was affected by the V content. The cermets with 2.5 wt.% V addition exhibited the smallest grain size. An increasing V content decreased the wettability of the binder on the Mo{sub 2}FeB{sub 2} hard phase, and accordingly resulted in the increase of porosity and aggregation of ceramic grains. EDS results showed that V addition occurred primarily in the hard phase, with a little amount in the Fe alloy binder. In addition, the content of Mo element in the binder decreased with increasing V content. The cermets with 2.5 wt.% V addition showed the highest TRS, hardness and fracture toughness of 2350 MPa, HRA 90.6 and 15.1 MPa m{sup 1/2}, respectively. Available from http://dx.doi.org/10.1016/j.matdes.2009.11.051 United Kingdom 2010-05-15 English Journal Article Journal Name: Materials and Design; Journal Volume: 31; Journal Issue: 5; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA) Medium: X; Size: page(s) 2680-2683 https://doi.org/10.1016/J.MATDES.2009.11.051 PII: S0261-3069(09)00671-2 [] 5 31 Journal ID: ISSN 0261-3069; CODEN: MADSD2; Other: PII: S0261-3069(09)00671-2; TRN: GB10R3106017801 INIS 2014-02-27 22196978