The
present study reports the in-situ synthesis of hybrid powders containing
vanadium borides (VB2, V3B4 and V2B3)
and vanadium carbide (VC) using powder metallurgy methods. VB2-V3B4-V2B3/VC
hybrid powders were synthesized from V2O5,
B2O3 and
C powder blends via a carbothermal reduction route assisted by mechanical
milling. Powder blends were mechanically milled up to 5 h in a high-energy ball
mill. The milling process reduced the crystallite size, increased the
uniformity of the particle distribution and hence increased the reactivity of
the starting powders. As-blended and milled powders were annealed at different
temperatures (1400, 1500 and 1600°C) for 12 h to investigate the probability of
achieving vanadium boride and carbide phases simultaneously. Annealed powders
were characterized using X-ray diffractometer (XRD), scanning electron
microscope/energy dispersive spectrometer (SEM/EDS) and particle size analyzer.
In case of using annealing temperature of 1400°C, VB2-V3B4-V2B3/VC
hybrid powders were obtained with an amount of unreacted V2O5.
Annealing temperatures of 1500 and 1600°C resulted in the formation of VB2,
V3B4, V2B3
and VC phases. Milling affected the weight percentages of the phases as well as
the type of major boride phase.
Annealing mechanical milling microstructure vanadium borides
Birincil Dil | İngilizce |
---|---|
Konular | Mühendislik |
Bölüm | Research Makaleler |
Yazarlar | |
Yayımlanma Tarihi | 30 Kasım 2018 |
Kabul Tarihi | 15 Ekim 2018 |
Yayımlandığı Sayı | Yıl 2018 Cilt: 3 Sayı: 3 |
© 2016 Her Hakkı Saklıdır.
TENMAK Bor Araştırma Enstitüsü