Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of V content on the microstructure and mechanical properties of Mo2FeB2 based cermets
AbstractFour series of cermets with V content between 0 and 7.5wt.% in 2.5wt.% 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 (KIC) were also measured. It was found that the grain size was affected by the V content. The cermets with 2.5wt.% V addition exhibited the smallest grain size. An increasing V content decreased the wettability of the binder on the Mo2FeB2 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 2.5wt.% V addition showed the highest TRS, hardness and fracture toughness of 2350MPa, HRA 90.6 and 15.1MPam1/2, respectively.
Effect of V content on the microstructure and mechanical properties of Mo2FeB2 based cermets
AbstractFour series of cermets with V content between 0 and 7.5wt.% in 2.5wt.% 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 (KIC) were also measured. It was found that the grain size was affected by the V content. The cermets with 2.5wt.% V addition exhibited the smallest grain size. An increasing V content decreased the wettability of the binder on the Mo2FeB2 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 2.5wt.% V addition showed the highest TRS, hardness and fracture toughness of 2350MPa, HRA 90.6 and 15.1MPam1/2, respectively.
Effect of V content on the microstructure and mechanical properties of Mo2FeB2 based cermets
Yu, Haizhou (Autor:in) / Zheng, Yong (Autor:in) / Liu, Wenjun (Autor:in) / Zheng, Jianzhi (Autor:in) / Xiong, Weihao (Autor:in)
21.11.2009
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of V content on the microstructure and mechanical properties of Mo2FeB2 based cermets
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