Nanoindentation creep of supercrystalline nanocomposites
Supercrystalline nanocomposites (SCNCs) are inorganic-organic hybrid materials with a unique periodic nanostructure, and thus they have been gaining growing attention for their intriguing functional properties and parallelisms with hierarchical biomaterials. Their mechanical behavior remains, howeve...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
|
| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752300415X |
| _version_ | 1797794120387788800 |
|---|---|
| author | Cong Yan Büsra Bor Alexander Plunkett Berta Domènech Verena Maier-Kiener Diletta Giuntini |
| author_facet | Cong Yan Büsra Bor Alexander Plunkett Berta Domènech Verena Maier-Kiener Diletta Giuntini |
| author_sort | Cong Yan |
| collection | DOAJ |
| description | Supercrystalline nanocomposites (SCNCs) are inorganic-organic hybrid materials with a unique periodic nanostructure, and thus they have been gaining growing attention for their intriguing functional properties and parallelisms with hierarchical biomaterials. Their mechanical behavior remains, however, poorly understood, even though its understanding and control are important to allow SCNCs’ implementation into devices. An important aspect that has not been tackled yet is their time-dependent deformation behavior, which is nevertheless expected to play an important role in materials containing such a distribution of organic phase. Hereby, we report on the creep of ceramic-organic SCNCs with varying degrees of organic crosslinking, as assessed via nanoindentation. Creep strains and their partial recoverability are observed, hinting at the co-presence of viscoelasticity and viscoplasticity, and a clear effect of crosslinking in decreasing the overall material deformability emerges. We rationalize our experimental observations with the analysis of stress exponent and activation volume, resulting in a power-law breakdown behavior and governing deformation mechanisms occurring at the organic sub-nm interfaces scale, as rearrangement of organic ligands. The set of results is reinforced by the evaluation of the strain rate sensitivity via strain rate jump tests, and the assessment of the effect of oscillations during continuous stiffness measurement mode. |
| first_indexed | 2024-03-13T02:57:08Z |
| format | Article |
| id | doaj.art-ff40196a1c18434fa586592fa4c22aac |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-13T02:57:08Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-ff40196a1c18434fa586592fa4c22aac2023-06-28T04:28:24ZengElsevierMaterials & Design0264-12752023-07-01231112000Nanoindentation creep of supercrystalline nanocompositesCong Yan0Büsra Bor1Alexander Plunkett2Berta Domènech3Verena Maier-Kiener4Diletta Giuntini5Department of Mechanical Engineering, Eindhoven University of Technology, The NetherlandsInstitute of Advanced Ceramics, Hamburg University of Technology, GermanyInstitute of Advanced Ceramics, Hamburg University of Technology, GermanyInstitute of Advanced Ceramics, Hamburg University of Technology, Germany; ams-OSRAM International GmbH, ams OSRAM Group, GermanyDepartment of Materials Science, Montanuniversität Leoben, AustriaDepartment of Mechanical Engineering, Eindhoven University of Technology, The Netherlands; Institute of Advanced Ceramics, Hamburg University of Technology, Germany; Corresponding author at: Department of Mechanical Engineering, Eindhoven University of Technology, The Netherlands.Supercrystalline nanocomposites (SCNCs) are inorganic-organic hybrid materials with a unique periodic nanostructure, and thus they have been gaining growing attention for their intriguing functional properties and parallelisms with hierarchical biomaterials. Their mechanical behavior remains, however, poorly understood, even though its understanding and control are important to allow SCNCs’ implementation into devices. An important aspect that has not been tackled yet is their time-dependent deformation behavior, which is nevertheless expected to play an important role in materials containing such a distribution of organic phase. Hereby, we report on the creep of ceramic-organic SCNCs with varying degrees of organic crosslinking, as assessed via nanoindentation. Creep strains and their partial recoverability are observed, hinting at the co-presence of viscoelasticity and viscoplasticity, and a clear effect of crosslinking in decreasing the overall material deformability emerges. We rationalize our experimental observations with the analysis of stress exponent and activation volume, resulting in a power-law breakdown behavior and governing deformation mechanisms occurring at the organic sub-nm interfaces scale, as rearrangement of organic ligands. The set of results is reinforced by the evaluation of the strain rate sensitivity via strain rate jump tests, and the assessment of the effect of oscillations during continuous stiffness measurement mode.http://www.sciencedirect.com/science/article/pii/S026412752300415XNanocompositesSupercrystalsNanoindentationCreep |
| spellingShingle | Cong Yan Büsra Bor Alexander Plunkett Berta Domènech Verena Maier-Kiener Diletta Giuntini Nanoindentation creep of supercrystalline nanocomposites Materials & Design Nanocomposites Supercrystals Nanoindentation Creep |
| title | Nanoindentation creep of supercrystalline nanocomposites |
| title_full | Nanoindentation creep of supercrystalline nanocomposites |
| title_fullStr | Nanoindentation creep of supercrystalline nanocomposites |
| title_full_unstemmed | Nanoindentation creep of supercrystalline nanocomposites |
| title_short | Nanoindentation creep of supercrystalline nanocomposites |
| title_sort | nanoindentation creep of supercrystalline nanocomposites |
| topic | Nanocomposites Supercrystals Nanoindentation Creep |
| url | http://www.sciencedirect.com/science/article/pii/S026412752300415X |
| work_keys_str_mv | AT congyan nanoindentationcreepofsupercrystallinenanocomposites AT busrabor nanoindentationcreepofsupercrystallinenanocomposites AT alexanderplunkett nanoindentationcreepofsupercrystallinenanocomposites AT bertadomenech nanoindentationcreepofsupercrystallinenanocomposites AT verenamaierkiener nanoindentationcreepofsupercrystallinenanocomposites AT dilettagiuntini nanoindentationcreepofsupercrystallinenanocomposites |