Texture and microstructural changes after thermal cycling of 6061Al-20vol%SiCw metal matrix composite: The role of microscopic internal stresses

Eddahbi, M.; Fernández, Rafael Ramos; Llorente, I.; González-Doncel, Gaspar

doi:10.1016/j.mtcomm.2022.104914

Cited by 1 publication

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“…The internal stress and fracture strength can both determine the lifetimes of ceramic coatings used as hydrogen permeation barriers. The internal stress is derived from the difference between the shrinkages of the ceramic coating and steel substrate during annealing . Prolonged thermal cycling eventually increases the internal stress of the coating .…”

Section: Introductionmentioning

confidence: 99%

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Zheng,

Yang,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

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Ceramic coatings that can effectively prevent hydrogen permeation have a wide range of applications in hydrogen energy and nuclear fusion reactors. In this study, for the first time, the internal stress of Er 2 O 3 coatings was found to be a key factor that could determine their hydrogen permeation resistance and lifespan. The internal stress was controlled by designing layered Er 2 O 3 coatings. The internal stress increased with an increasing number of Er 2 O 3 layers. When the number of layers was below 15, the increased internal stress did not adversely affect the coating performance and might help to increase its hydrogen permeation resistance. Although the overall thickness of the 15-layer Er 2 O 3 coating was only 97 nm, its hydrogen permeation reduction factor (PRF) reached the highest value of 626, whereas a further increase in the internal stress detrimentally affected the ability of the coating to reduce hydrogen permeation. In addition, the experimental observations and simulation results revealed that the performance of the Er 2 O 3 coatings was related to the hydrogen atoms that penetrated the coating, which weakened the Er−O bonds and consequently decreased the Er 2 O 3 fracture limit. This study provides insights into the effects of internal stress and hydrogen penetration on the performance of ceramic coatings as hydrogen permeation barriers and will help guide strategies for the structure design of hydrogen permeation barriers possessing high PRFs and long lifespans.

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Section: Introductionmentioning

confidence: 99%

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Zheng,

Yang,

Yan

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

Texture and microstructural changes after thermal cycling of 6061Al-20vol%SiCw metal matrix composite: The role of microscopic internal stresses

Cited by 1 publication

References 40 publications

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

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Texture and microstructural changes after thermal cycling of 6061Al-20vol%SiCw metal matrix composite: The role of microscopic internal stresses

Cited by 1 publication

References 40 publications

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er2O3 Coatings as Hydrogen Permeation Barriers

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er2O3 Coatings as Hydrogen Permeation Barriers

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Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers

Effects of Internal Stress and Hydrogen Penetration on the Performance of Er₂O₃ Coatings as Hydrogen Permeation Barriers