Authors:
Indeevar Singh (1),Vikram Dabhade (1), Mayadhar Debata (2), Ajit Panigrahi (2)
1- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Uttarakhand, India
2- Advanced Materials Technology, CSIR-Institute of Minerals and Materials Technology, Odisha, India
Abstract:
The potential advantage of adding niobium to tungsten heavy alloys owing to its lower thermal conductivity and specific heat beneficiary for kinetic energy penetrator is still unexplored. To explore this uncharted area, the effect of Nb addition in WHA for its sinterability, densification and microstructure attributes is investigated. In this study two different compositions of 90W – 7:3(Ni:Fe) and 90W – 6:2:2 (Ni:Fe:Co) were blended with 2.5 wt % Nb followed by compaction and sintered in a reducing atmosphere at 1500 oC. The finding suggested larger tungsten grain formation with Nb addition in both the alloy compositions along with formation of Nb-oxides and W-Nb intermetallics. Increasing Nb concentration hindered sinterability and densification for alloys due to Nb-Oxide formation. This study offer insight into the use of niobium as a promising alloying element in tungsten-heavy alloys (WHA).
DOI:
https://doi.org/10.59499/EP246281538
