Open AccessThermodynamic assessment of the Fe-Nb-Si system
Author(s) -
Yabin Jiang,
F. Li,
S.-R. Li,
Kai Xu,
L.-L. Chen,
Xiaoxue Deng,
Y. C. Huang,
Keke Chang
Publication year - 2021
Publication title -
journal of mining and metallurgy. section b, metallurgy/journal of mining and metallurgy. section b, metallurgy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 20
eISSN - 2217-7175
pISSN - 1450-5339
DOI - 10.2298/jmmb191220029j
Subject(s) - liquidus , calphad , isothermal process , thermodynamics , phase diagram , materials science , ternary operation , alloy , work (physics) , ternary numeral system , ab initio , standard enthalpy of formation , phase (matter) , metallurgy , chemistry , computer science , physics , organic chemistry , programming language
Nb?Si based alloys have drawn continuously increasing attention due to their excellent high-temperature mechanical properties. The addition of element Fe could improve their poor high-temperature oxidation resistance which largely restricts their application. With the aim to study the effect of Fe addition on the Nb?Si system and to design appropriate alloy composition, the Fe?Nb?Si ternary system was thermodynamically investigated using the CALPHAD (CALculation of PHAse Diagrams) approach aided with the formation enthalpies for ternary compounds at 0 K computed via ab initio calculations. A self-consistent thermodynamic description of the Fe?Nb?Si system was obtained in this work. Key isothermal sections and liquidus projection were presented, and the calculation results showed a good agreement with available experimental data.