Experimental Investigation on the Phase Equilibria of the Nb-Ti-Si-B System at 1500 °C
Source abstract
Abstract
The phase equilibria at 1500 °C of the Nb-Ti-Si-B quaternary at the Nb-rich region were carefully studied. Seven alloys were arc-melted and subsequently annealed at 1500 °C for 150 h. BSE image, XRD and EPMA results show that Nbss + T2 + Nb3B2, Nbss + T2 + Nb3Si and Nbss + T2 + Nb3B2 + Nb3Si were present in these alloys. Extensive solubility of Ti and Si were found in the Nb3B2 phase. The experimental findings were compared favorably with the calculated phase equilibria. The phase equilibria in the Nb-rich region of the Nb-Ti-Si-B system have Nbss + T2, Nbss + T2 + Nb3B2, Nbss + T2 + Nb3Si and Nbss + T2 + Nb3B2 + Nb3Si. This work provides important guide lines on the effect of B addition to the microstructure of the Nb-rich Nb-Ti-Si alloys.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · Semiconductor materials and interfaces · Advanced materials and composites
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References (15)
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