Recrystallization mechanisms during high-temperature XRD and oxidation behavior of CNT-reinforced NiAl composites

M. A. Awotunde; B. J. Babalola; P. A. Olubambi; D. L. Chen

doi:10.1016/j.corsci.2022.110384

Recrystallization mechanisms during high-temperature XRD and oxidation behavior of CNT-reinforced NiAl composites

M. A. Awotunde, B. J. Babalola, P. A. Olubambi, D. L. Chen

Metallurgy

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

3 Citations (Scopus)

Abstract

In this study, a new perspective is presented on the CNTs-reinforced NiAl intermetallic composites, focusing on the influence of CNT addition on their high-temperature behavior. The obtained results revealed an effective grain boundary pinning effect of CNTs in hindering recrystallization and grain growth of the reinforced composites at high temperatures, leading to significantly smaller grain sizes. CNTs were observed to be beneficial for the high-temperature oxidation resistance at lower concentrations, but detrimental to the oxide scale adherence at higher concentrations. Subsequently, the NiAl-0.5CNT composites exhibited the lowest weight gain due to the stabilizing effect of carbon on the NiAl phase.

Original language	English
Article number	110384
Journal	Corrosion Science
Volume	204
DOIs	https://doi.org/10.1016/j.corsci.2022.110384
Publication status	Published - 1 Aug 2022

Keywords

CNTs
EBSD
HT-XRD
NiAl
Oxidation
Recrystallization

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

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10.1016/j.corsci.2022.110384

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title = "Recrystallization mechanisms during high-temperature XRD and oxidation behavior of CNT-reinforced NiAl composites",

abstract = "In this study, a new perspective is presented on the CNTs-reinforced NiAl intermetallic composites, focusing on the influence of CNT addition on their high-temperature behavior. The obtained results revealed an effective grain boundary pinning effect of CNTs in hindering recrystallization and grain growth of the reinforced composites at high temperatures, leading to significantly smaller grain sizes. CNTs were observed to be beneficial for the high-temperature oxidation resistance at lower concentrations, but detrimental to the oxide scale adherence at higher concentrations. Subsequently, the NiAl-0.5CNT composites exhibited the lowest weight gain due to the stabilizing effect of carbon on the NiAl phase.",

keywords = "CNTs, EBSD, HT-XRD, NiAl, Oxidation, Recrystallization",

author = "Awotunde, {M. A.} and Babalola, {B. J.} and Olubambi, {P. A.} and Chen, {D. L.}",

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T1 - Recrystallization mechanisms during high-temperature XRD and oxidation behavior of CNT-reinforced NiAl composites

AU - Awotunde, M. A.

AU - Babalola, B. J.

AU - Olubambi, P. A.

AU - Chen, D. L.

PY - 2022/8/1

Y1 - 2022/8/1

N2 - In this study, a new perspective is presented on the CNTs-reinforced NiAl intermetallic composites, focusing on the influence of CNT addition on their high-temperature behavior. The obtained results revealed an effective grain boundary pinning effect of CNTs in hindering recrystallization and grain growth of the reinforced composites at high temperatures, leading to significantly smaller grain sizes. CNTs were observed to be beneficial for the high-temperature oxidation resistance at lower concentrations, but detrimental to the oxide scale adherence at higher concentrations. Subsequently, the NiAl-0.5CNT composites exhibited the lowest weight gain due to the stabilizing effect of carbon on the NiAl phase.

AB - In this study, a new perspective is presented on the CNTs-reinforced NiAl intermetallic composites, focusing on the influence of CNT addition on their high-temperature behavior. The obtained results revealed an effective grain boundary pinning effect of CNTs in hindering recrystallization and grain growth of the reinforced composites at high temperatures, leading to significantly smaller grain sizes. CNTs were observed to be beneficial for the high-temperature oxidation resistance at lower concentrations, but detrimental to the oxide scale adherence at higher concentrations. Subsequently, the NiAl-0.5CNT composites exhibited the lowest weight gain due to the stabilizing effect of carbon on the NiAl phase.

KW - CNTs

KW - EBSD

KW - HT-XRD

KW - NiAl

KW - Oxidation

KW - Recrystallization

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JO - Corrosion Science

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Recrystallization mechanisms during high-temperature XRD and oxidation behavior of CNT-reinforced NiAl composites

Abstract

Keywords

ASJC Scopus subject areas

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