Abstract
In this study, electric current effects on the densification, microstructure, and properties of W-Mo-Cu alloy fabricated by large current electric field sintering (LCS) were investigated. The apparent sintering activation energy for densification (ASAED) was calculated to decrease from 72.01 kJ/mol to 24.02 kJ/mol with the increased electric current from 30,000 A to 50,000 A, thereby enhancing the sinterability of the W-Mo-Cu mixed powder and improving the densification of W-Mo-Cu alloy. The experimental results also proved that the elevated electric current optimized the microstructure and properties of the W-Mo-Cu alloy. Moreover, XRD and TEM results suggested that electric current had a significant effect on the phase transformation of the alloy, while the varying electric current did not affect the phase type. Besides W, Mo, and Cu phases, the W-Mo-Cu alloy prepared by LCS contains three new phases, i.e., Cu0.4W0.6 intermetallic compound, Mo-Cu solid solution, and W-Mo solid solution, none of which are present in an equilibrium state.
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Acknowledgements
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 51674171) and the Natural Science Foundation Project of Chongqing (Grant No. CSTB2022NSCQ-MSX1496).
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Feng, K., Zhou, H., Xiao, Y. et al. Study on the Electric Current Effects on the Microstructure and Properties of W-Mo-Cu Alloy Under the Action of Electric Field. JOM 75, 780–790 (2023). https://doi.org/10.1007/s11837-022-05626-0
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DOI: https://doi.org/10.1007/s11837-022-05626-0