[HTML][HTML] Alloys for application at ultra-high temperatures: Nb-silicide in situ composites: Challenges, breakthroughs and opportunities

P Tsakiropoulos - Progress in Materials Science, 2022 - Elsevier
The paper reflects on the development of Nb-silicide based alloys vis-à-vis property goals
and compares them with refractory-complex-concentrated-alloys (RCCAs) for their density …

Effect of the Al, Cr and B elements on the mechanical properties and oxidation resistance of Nb-Si based alloys: a review

F Shen, L Yu, T Fu, Y Zhang, H Wang, K Cui, J Wang… - Applied Physics A, 2021 - Springer
Nb-Si based alloys are considered as a potential candidates to substitute for Ni-based super
alloys. However, its poor mechanical properties and high temperature oxidation resistance …

Oxidation of Nb–Si–Cr–Al in situ composites with Mo, Ti and Hf additions

J Geng, P Tsakiropoulos, G Shao - Materials Science and Engineering: A, 2006 - Elsevier
The effects of Mo, Ti and/or Hf additions on the isothermal oxidation behaviour of Nb–Si–Cr–
Al-based in situ composites in static air at 800° C and 1200° C were studied for the as-cast …

On the oxidation mechanism of niobium-base in situ composites

S Mathieu, S Knittel, P Berthod, M Vilasi - Corrosion Science, 2012 - Elsevier
The Metal And Silicide Composite (MASC), having the composition Nb–25Ti–8Hf–2Cr–2Al–
16Si, at.%, was studied in static oxidising condition in air at 815, 1100 and 1200° C. Phases …

A study of the microstructures and oxidation of Nb–Si–Cr–Al–Mo in situ composites alloyed with Ti, Hf and Sn

J Geng, P Tsakiropoulos - Intermetallics, 2007 - Elsevier
The effects of alloying on the microstructures, solidification path, phase stability and
oxidation kinetics of Nbss/Nb5Si3 base in situ composites of the Nb–Ti–Si–Al–Cr–Mo–Hf …

Alloying effects on the microstructure and properties of Nb–Si based ultrahigh temperature alloys

S Zhang, X Guo - Intermetallics, 2016 - Elsevier
Abstract Eight multi-component Nb–Si based ultrahigh temperature alloys were prepared by
vacuum non-consumable arc melting. The effects of Hf, B and Cr alloying on the phase …

Study of the effects of Zr addition on the microstructure and properties of Nb-Ti-Si based ultrahigh temperature alloys

Y Qiao, X Guo, Y Zeng - Intermetallics, 2017 - Elsevier
The effects of alloying with Zr on the microstructure, mechanical and oxidation properties of
Nb-Ti-Si based ultrahigh temperature alloys have been investigated in this study. The …

A study of the effects of Hf and Sn additions on the microstructure of Nbss/Nb5Si3 based in situ composites

J Geng, P Tsakiropoulos, G Shao - Intermetallics, 2007 - Elsevier
The phase stability and microstructures of Nbss/Nb5Si3 based in situ composites alloyed
with Hf and Sn have been investigated. The Nb5Si3 silicide in the β and γ forms was the …

Microstructural and mechanical characterization of Nb-based in situ composites from Nb–Si–Ti ternary system

Z Li, LM Peng - Acta materialia, 2007 - Elsevier
This study deals with the Nb–niobium silicide-based composites developed by the hot-
pressing of Nb–Si–Ti ternary powder mixtures with a fixed Ti addition (6at.%) and Si content …

Study of the role of Al, Cr and Ti additions in the microstructure of Nb–18Si–5Hf base alloys

I Grammenos, P Tsakiropoulos - Intermetallics, 2010 - Elsevier
The effects of Cr, Al and Ti on the microstructure and hardness of as cast and heat treated
Nb–18Si–5Hf–5Cr (YG1), Nb–18Si–5Hf–5Al (YG2) and Nb–18Si–5Hf–24Ti (YG3) alloys …