Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure
Abstract This study investigates the impact of high-pressure hydrogen gas exposure on the structural and morphological characteristics of O-ring materials. O-ring specimens undergo two cycles of sealing under 70 MPa hydrogen gas, and their resulting variations are examined using advanced characteriz...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-55101-w |
| _version_ | 1797275113798762496 |
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| author | Chang Hoon Lee Jae Kap Jung Kyung Sook Kim Chang Jong Kim |
| author_facet | Chang Hoon Lee Jae Kap Jung Kyung Sook Kim Chang Jong Kim |
| author_sort | Chang Hoon Lee |
| collection | DOAJ |
| description | Abstract This study investigates the impact of high-pressure hydrogen gas exposure on the structural and morphological characteristics of O-ring materials. O-ring specimens undergo two cycles of sealing under 70 MPa hydrogen gas, and their resulting variations are examined using advanced characterization techniques, including powder X-ray diffraction (PXRD), small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Our findings reveal that the lattice parameters of the O-ring material show no significant changes when exposed to 70 MPa hydrogen gas. However, in the micrometre range, the formation of a hierarchical channel morphology becomes evident. This morphology is accompanied by the separation of carbon black filler from the rubber matrix, contributing to mechanical weakening of the O-ring. These observations can be attributed to the pressure gradient that develops between the inner and outer radii of the O-ring, resulting from compression forces acting perpendicularly to the radial direction due to clamp locking. |
| first_indexed | 2024-03-07T15:08:41Z |
| format | Article |
| id | doaj.art-f0b7ace6f098445bb8a295abf8d8ee8a |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T15:08:41Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-f0b7ace6f098445bb8a295abf8d8ee8a2024-03-05T18:47:04ZengNature PortfolioScientific Reports2045-23222024-03-0114111110.1038/s41598-024-55101-wHierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failureChang Hoon Lee0Jae Kap Jung1Kyung Sook Kim2Chang Jong Kim3Department of Biochemical Engineering, Chosun UniversityHydrogen Energy Materials Research Team, Korea Research Institute of Standards and ScienceDepartment of Biomedical Engineering, College of Medicine, Kyung Hee UniversityLG Chem Europe GmbHAbstract This study investigates the impact of high-pressure hydrogen gas exposure on the structural and morphological characteristics of O-ring materials. O-ring specimens undergo two cycles of sealing under 70 MPa hydrogen gas, and their resulting variations are examined using advanced characterization techniques, including powder X-ray diffraction (PXRD), small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Our findings reveal that the lattice parameters of the O-ring material show no significant changes when exposed to 70 MPa hydrogen gas. However, in the micrometre range, the formation of a hierarchical channel morphology becomes evident. This morphology is accompanied by the separation of carbon black filler from the rubber matrix, contributing to mechanical weakening of the O-ring. These observations can be attributed to the pressure gradient that develops between the inner and outer radii of the O-ring, resulting from compression forces acting perpendicularly to the radial direction due to clamp locking.https://doi.org/10.1038/s41598-024-55101-w |
| spellingShingle | Chang Hoon Lee Jae Kap Jung Kyung Sook Kim Chang Jong Kim Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure Scientific Reports |
| title | Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure |
| title_full | Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure |
| title_fullStr | Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure |
| title_full_unstemmed | Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure |
| title_short | Hierarchical channel morphology in O-rings after two cycling exposures to 70 MPa hydrogen gas: a case study of sealing failure |
| title_sort | hierarchical channel morphology in o rings after two cycling exposures to 70 mpa hydrogen gas a case study of sealing failure |
| url | https://doi.org/10.1038/s41598-024-55101-w |
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