Improving oxidation resistance of TaMoZrTiAl refractory high entropy alloys via Nb and Si alloying

Yueling Guo; Jian Peng; Siyi Peng; Fengchao An; Wenjun Lu; Zhiming Li

doi:10.1016/j.corsci.2023.111455

Improving oxidation resistance of TaMoZrTiAl refractory high entropy alloys via Nb and Si alloying

Yueling Guo^*, Jian Peng, Siyi Peng, Fengchao An, Wenjun Lu^*, Zhiming Li

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Here, we investigate the interplay effects of Si and Nb alloying on the oxidation behaviors of the refractory high entropy alloys (RHEAs) at 1000 ℃. The alloying of Nb and Si promotes the formation of dendritic microstructures, suppresses the transition from parabolic to linear oxidation kinetics and significantly improves the oxidation resistance. Severe cracking of oxide scales is also reduced via Nb and Si alloying. According to the scanning transmission electron microscopy analysis, ZrO₂ and TiO₂ are initially formed during oxidation, and oxidation proceeds with the inward diffusion of oxygen, preferentially through the interdendritic region and BCC grain boundaries.

Original language	English
Article number	111455
Journal	Corrosion Science
Volume	223
DOIs	https://doi.org/10.1016/j.corsci.2023.111455
Publication status	Published - Oct 2023

Keywords

High temperature oxidation
Nb alloying
Oxide scale
Refractory high entropy alloy
Si alloying

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10.1016/j.corsci.2023.111455

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title = "Improving oxidation resistance of TaMoZrTiAl refractory high entropy alloys via Nb and Si alloying",

abstract = "Here, we investigate the interplay effects of Si and Nb alloying on the oxidation behaviors of the refractory high entropy alloys (RHEAs) at 1000 ℃. The alloying of Nb and Si promotes the formation of dendritic microstructures, suppresses the transition from parabolic to linear oxidation kinetics and significantly improves the oxidation resistance. Severe cracking of oxide scales is also reduced via Nb and Si alloying. According to the scanning transmission electron microscopy analysis, ZrO2 and TiO2 are initially formed during oxidation, and oxidation proceeds with the inward diffusion of oxygen, preferentially through the interdendritic region and BCC grain boundaries.",

keywords = "High temperature oxidation, Nb alloying, Oxide scale, Refractory high entropy alloy, Si alloying",

author = "Yueling Guo and Jian Peng and Siyi Peng and Fengchao An and Wenjun Lu and Zhiming Li",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

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doi = "10.1016/j.corsci.2023.111455",

language = "English",

volume = "223",

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TY - JOUR

T1 - Improving oxidation resistance of TaMoZrTiAl refractory high entropy alloys via Nb and Si alloying

AU - Guo, Yueling

AU - Peng, Jian

AU - Peng, Siyi

AU - An, Fengchao

AU - Lu, Wenjun

AU - Li, Zhiming

PY - 2023/10

Y1 - 2023/10

N2 - Here, we investigate the interplay effects of Si and Nb alloying on the oxidation behaviors of the refractory high entropy alloys (RHEAs) at 1000 ℃. The alloying of Nb and Si promotes the formation of dendritic microstructures, suppresses the transition from parabolic to linear oxidation kinetics and significantly improves the oxidation resistance. Severe cracking of oxide scales is also reduced via Nb and Si alloying. According to the scanning transmission electron microscopy analysis, ZrO2 and TiO2 are initially formed during oxidation, and oxidation proceeds with the inward diffusion of oxygen, preferentially through the interdendritic region and BCC grain boundaries.

AB - Here, we investigate the interplay effects of Si and Nb alloying on the oxidation behaviors of the refractory high entropy alloys (RHEAs) at 1000 ℃. The alloying of Nb and Si promotes the formation of dendritic microstructures, suppresses the transition from parabolic to linear oxidation kinetics and significantly improves the oxidation resistance. Severe cracking of oxide scales is also reduced via Nb and Si alloying. According to the scanning transmission electron microscopy analysis, ZrO2 and TiO2 are initially formed during oxidation, and oxidation proceeds with the inward diffusion of oxygen, preferentially through the interdendritic region and BCC grain boundaries.

KW - High temperature oxidation

KW - Nb alloying

KW - Oxide scale

KW - Refractory high entropy alloy

KW - Si alloying

UR - http://www.scopus.com/inward/record.url?scp=85172170656&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2023.111455

DO - 10.1016/j.corsci.2023.111455

M3 - Article

AN - SCOPUS:85172170656

SN - 0010-938X

VL - 223

JO - Corrosion Science

JF - Corrosion Science

M1 - 111455

ER -

Improving oxidation resistance of TaMoZrTiAl refractory high entropy alloys via Nb and Si alloying

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Keywords

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