Electrochemically-stimulated nanoscale mechanochemical wear of silicon
Abstract Mechanochemical reactions at the sliding interface between a single-crystalline silicon (Si) wafer and a silica (SiO2) microsphere were studied in three environmental conditions: humid air, potassium chloride (KCl) solution, and KCl solution with an applied voltage. Compared to that from hu...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-06-01
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| Series: | Friction |
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| Online Access: | https://doi.org/10.1007/s40544-023-0764-4 |
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| author | Chen Xiao Stefan Van Vliet Roland Bliem Bart Weber Steve Franklin |
| author_facet | Chen Xiao Stefan Van Vliet Roland Bliem Bart Weber Steve Franklin |
| author_sort | Chen Xiao |
| collection | DOAJ |
| description | Abstract Mechanochemical reactions at the sliding interface between a single-crystalline silicon (Si) wafer and a silica (SiO2) microsphere were studied in three environmental conditions: humid air, potassium chloride (KCl) solution, and KCl solution with an applied voltage. Compared to that from humid air, mechanochemical material removal from the silicon surface increased substantially in the KCl-immersed condition, and further increased when electrochemistry was introduced into the tribological system. By measuring the load dependence of the material removal rate and analyzing the results using a mechanically assisted Arrhenius-type kinetic model, the activation energy (E a) and the mechanical energy (E m), by which this energy is reduced by mechanical activation, were compared qualitatively under different environmental conditions. In the KCl-immersed condition, mechanochemistry may decrease the required effective energy of reactions (E eff = E a − E m) and promote material removal mainly through improved catalysis of the mechanochemical reactions facilitated by greater availability of water molecules compared to the humid air condition. Thus, the effectiveness of the mechanochemistry is improved. In the electrochemical condition, electrochemically-accelerated oxidation of the silicon surface was confirmed by the X-ray photoelectron spectroscopy (XPS) characterization. The results strongly suggest that electrochemistry further stimulates mechanochemical reactions primarily by increasing the initial energy state of the surface via the facilitated formation of interfacial bonding bridges, i.e., a surface oxidation/hydroxylation process. |
| format | Article |
| id | doaj-art-a9a255ee4d2b4d03bd6628ffbcf7f047 |
| institution | OA Journals |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2023-06-01 |
| publisher | Tsinghua University Press |
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| series | Friction |
| spelling | doaj-art-a9a255ee4d2b4d03bd6628ffbcf7f0472025-08-20T02:00:46ZengTsinghua University PressFriction2223-76902223-77042023-06-0111112142215210.1007/s40544-023-0764-4Electrochemically-stimulated nanoscale mechanochemical wear of siliconChen Xiao0Stefan Van Vliet1Roland Bliem2Bart Weber3Steve Franklin4Advanced Research Center for Nanolithography (ARCNL)Advanced Research Center for Nanolithography (ARCNL)Advanced Research Center for Nanolithography (ARCNL)Advanced Research Center for Nanolithography (ARCNL)Advanced Research Center for Nanolithography (ARCNL)Abstract Mechanochemical reactions at the sliding interface between a single-crystalline silicon (Si) wafer and a silica (SiO2) microsphere were studied in three environmental conditions: humid air, potassium chloride (KCl) solution, and KCl solution with an applied voltage. Compared to that from humid air, mechanochemical material removal from the silicon surface increased substantially in the KCl-immersed condition, and further increased when electrochemistry was introduced into the tribological system. By measuring the load dependence of the material removal rate and analyzing the results using a mechanically assisted Arrhenius-type kinetic model, the activation energy (E a) and the mechanical energy (E m), by which this energy is reduced by mechanical activation, were compared qualitatively under different environmental conditions. In the KCl-immersed condition, mechanochemistry may decrease the required effective energy of reactions (E eff = E a − E m) and promote material removal mainly through improved catalysis of the mechanochemical reactions facilitated by greater availability of water molecules compared to the humid air condition. Thus, the effectiveness of the mechanochemistry is improved. In the electrochemical condition, electrochemically-accelerated oxidation of the silicon surface was confirmed by the X-ray photoelectron spectroscopy (XPS) characterization. The results strongly suggest that electrochemistry further stimulates mechanochemical reactions primarily by increasing the initial energy state of the surface via the facilitated formation of interfacial bonding bridges, i.e., a surface oxidation/hydroxylation process.https://doi.org/10.1007/s40544-023-0764-4spherical contactadhesive wearnormal loadingpower law |
| spellingShingle | Chen Xiao Stefan Van Vliet Roland Bliem Bart Weber Steve Franklin Electrochemically-stimulated nanoscale mechanochemical wear of silicon Friction spherical contact adhesive wear normal loading power law |
| title | Electrochemically-stimulated nanoscale mechanochemical wear of silicon |
| title_full | Electrochemically-stimulated nanoscale mechanochemical wear of silicon |
| title_fullStr | Electrochemically-stimulated nanoscale mechanochemical wear of silicon |
| title_full_unstemmed | Electrochemically-stimulated nanoscale mechanochemical wear of silicon |
| title_short | Electrochemically-stimulated nanoscale mechanochemical wear of silicon |
| title_sort | electrochemically stimulated nanoscale mechanochemical wear of silicon |
| topic | spherical contact adhesive wear normal loading power law |
| url | https://doi.org/10.1007/s40544-023-0764-4 |
| work_keys_str_mv | AT chenxiao electrochemicallystimulatednanoscalemechanochemicalwearofsilicon AT stefanvanvliet electrochemicallystimulatednanoscalemechanochemicalwearofsilicon AT rolandbliem electrochemicallystimulatednanoscalemechanochemicalwearofsilicon AT bartweber electrochemicallystimulatednanoscalemechanochemicalwearofsilicon AT stevefranklin electrochemicallystimulatednanoscalemechanochemicalwearofsilicon |