Consolidation of B&lt;sub&gt;4&lt;/sub&gt;C&amp;ndash;VB&lt;sub&gt;2&lt;/sub&gt; eutectic ceramics by spark plasma sintering

Demirskyi, Dmytro; Sakka, Yoshio; Vasylkiv, Oleg

doi:10.2109/jcersj2.123.1051

Cited by 11 publications

(1 citation statement)

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“…in the annealed samples. However, any peak showing a significant transmittance was not detected for the both annealed powders [18][19][20]. This corresponded that the 5 h of milled and annealed samples are hybrid powders only containing VB 2 , V 2 B 3 , V 3 B 4 and VC phases without any impurity.…”

Section: Resultsmentioning

confidence: 84%

Synthesis of VB2-V3B4-V2B3/VC hybrid powders via powder metallurgy processes

et al. 2018

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The present study reports the in-situ synthesis of hybrid powders containing vanadium borides (VB 2 , V 3 B 4 and V 2 B 3) and vanadium carbide (VC) using powder metallurgy methods. VB 2-V 3 B 4-V 2 B 3 /VC hybrid powders were synthesized from V 2 O 5 , B 2 O 3 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, VB 2-V 3 B 4-V 2 B 3 /VC hybrid powders were obtained with an amount of unreacted V 2 O 5. Annealing temperatures of 1500 and 1600°C resulted in the formation of VB 2 , V 3 B 4 , V 2 B 3 and VC phases. Milling affected the weight percentages of the phases as well as the type of major boride phase.

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Section: Resultsmentioning

confidence: 84%