Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings
Silicon oxide-doped hydrogenated amorphous carbons (a–C:H:Si:O) are amorphous thin films used as solid lubricants in a range of commercial applications, thanks to its increased stability in extreme environments, relative to amorphous hydrogenated carbons (a–C:H). This work aims to develop a fundamen...
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| Veröffentlicht in: | Carbon (New York) 2015-11, Vol.93, p.851-860 |
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| creator | Koshigan, K.D. Mangolini, F. McClimon, J.B. Vacher, B. Bec, S. Carpick, R.W. Fontaine, J. |
| description | Silicon oxide-doped hydrogenated amorphous carbons (a–C:H:Si:O) are amorphous thin films used as solid lubricants in a range of commercial applications, thanks to its increased stability in extreme environments, relative to amorphous hydrogenated carbons (a–C:H). This work aims to develop a fundamental understanding of the environmental impact on the tribology of a–C:H:Si:O. Upon sliding an a–C:H:Si:O film against a steel counterbody, two friction regimes develop: high friction in high vacuum and low gas pressure (oxygen pressure |
| doi_str_mv | 10.1016/j.carbon.2015.06.004 |
| format | Article |
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This work aims to develop a fundamental understanding of the environmental impact on the tribology of a–C:H:Si:O. Upon sliding an a–C:H:Si:O film against a steel counterbody, two friction regimes develop: high friction in high vacuum and low gas pressure (oxygen pressure<10mbar; hydrogen pressure<50mbar), and a low friction regime at higher gas pressures (10mbar<oxygen pressure<500mbar; 50mbar<hydrogen pressure<1000mbar). Scanning electron microscopy (SEM) revealed that the tribological behavior of a–C:H:Si:O is governed by adhesive junctions at the sliding interface. At low gas pressures, material transfer from the steel pin to the a–C:H:Si:O flat occurs. At higher gas pressures, a tribofilm forms on the steel countersurface. Raman and near edge X-ray absorption spectroscopy (NEXAFS) spectroscopies demonstrate that upon sliding under the higher gas pressure, low friction regime, a surface layer with an elevated fraction of sp2-bonded carbon atoms forms. These changes indicate that these gases favor the release of the adhesive junctions by dissociatively reacting with the mechanically-stressed sp2 carbon-rich surface layer.]]></description><identifier>ISSN: 0008-6223</identifier><identifier>EISSN: 1873-3891</identifier><identifier>DOI: 10.1016/j.carbon.2015.06.004</identifier><language>eng</language><publisher>United States: Elsevier Ltd</publisher><subject>Adhesives ; Carbon ; Friction ; Gas pressure ; Hydrogen storage ; Sliding ; Steels ; Tribology</subject><ispartof>Carbon (New York), 2015-11, Vol.93, p.851-860</ispartof><rights>2015 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c453t-6db530e4d79b2ddee231feefabb5508e4ab99d82eadcf18697e987eef55ae5d63</citedby><cites>FETCH-LOGICAL-c453t-6db530e4d79b2ddee231feefabb5508e4ab99d82eadcf18697e987eef55ae5d63</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0008622315005187$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1229498$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Koshigan, K.D.</creatorcontrib><creatorcontrib>Mangolini, F.</creatorcontrib><creatorcontrib>McClimon, J.B.</creatorcontrib><creatorcontrib>Vacher, B.</creatorcontrib><creatorcontrib>Bec, S.</creatorcontrib><creatorcontrib>Carpick, R.W.</creatorcontrib><creatorcontrib>Fontaine, J.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL), Upton, NY (United States)</creatorcontrib><title>Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings</title><title>Carbon (New York)</title><description><![CDATA[Silicon oxide-doped hydrogenated amorphous carbons (a–C:H:Si:O) are amorphous thin films used as solid lubricants in a range of commercial applications, thanks to its increased stability in extreme environments, relative to amorphous hydrogenated carbons (a–C:H). This work aims to develop a fundamental understanding of the environmental impact on the tribology of a–C:H:Si:O. Upon sliding an a–C:H:Si:O film against a steel counterbody, two friction regimes develop: high friction in high vacuum and low gas pressure (oxygen pressure<10mbar; hydrogen pressure<50mbar), and a low friction regime at higher gas pressures (10mbar<oxygen pressure<500mbar; 50mbar<hydrogen pressure<1000mbar). Scanning electron microscopy (SEM) revealed that the tribological behavior of a–C:H:Si:O is governed by adhesive junctions at the sliding interface. At low gas pressures, material transfer from the steel pin to the a–C:H:Si:O flat occurs. At higher gas pressures, a tribofilm forms on the steel countersurface. Raman and near edge X-ray absorption spectroscopy (NEXAFS) spectroscopies demonstrate that upon sliding under the higher gas pressure, low friction regime, a surface layer with an elevated fraction of sp2-bonded carbon atoms forms. These changes indicate that these gases favor the release of the adhesive junctions by dissociatively reacting with the mechanically-stressed sp2 carbon-rich surface layer.]]></description><subject>Adhesives</subject><subject>Carbon</subject><subject>Friction</subject><subject>Gas pressure</subject><subject>Hydrogen storage</subject><subject>Sliding</subject><subject>Steels</subject><subject>Tribology</subject><issn>0008-6223</issn><issn>1873-3891</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp9UbuOFDEQtBAnsdzdHxBYRCQz2J6XnSChEy_pJBIutjx2z65Xs_ZgexGb8Q-kfB1fcj0MIiSy211VXeUm5AVnNWe8f32srUljDLVgvKtZXzPWPiE7LoemaqTiT8mOMSarXojmGXme8xHLVvJ2R349BAcpFxOcD3taDkAPF5fiHgLFNxq_X9br3mS6JMj5nIA6WABZwQKN0x9KSX6Mc9x7a2bExQVS8ZDXdvaztzGgkHfw-8dPh033b4YpWJhTTMshnjPdYlAbTUE3-YZcTWbOcPv3vCYP7999uftY3X_-8Onu7X1l264pVe_GrmHQukGNwjkA0fAJYDLj2HVMQmtGpZwUYJyduOzVAEoOCOg6A53rm2vyctONuXidrS9gD2g6gC2aC6FaJRH0agNhvq9nyEWffLYwzyYAetd86AVTDPUR2m5Qm2LOCSa9JH8y6aI50-vG9FFvUfW6Mc16jftA2puNBpj1m4e0Wlm_2fm0OnHR_1_gEXn4p9Q</recordid><startdate>20151101</startdate><enddate>20151101</enddate><creator>Koshigan, K.D.</creator><creator>Mangolini, F.</creator><creator>McClimon, J.B.</creator><creator>Vacher, B.</creator><creator>Bec, S.</creator><creator>Carpick, R.W.</creator><creator>Fontaine, J.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>OTOTI</scope></search><sort><creationdate>20151101</creationdate><title>Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings</title><author>Koshigan, K.D. ; Mangolini, F. ; McClimon, J.B. ; Vacher, B. ; Bec, S. ; Carpick, R.W. ; Fontaine, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c453t-6db530e4d79b2ddee231feefabb5508e4ab99d82eadcf18697e987eef55ae5d63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Adhesives</topic><topic>Carbon</topic><topic>Friction</topic><topic>Gas pressure</topic><topic>Hydrogen storage</topic><topic>Sliding</topic><topic>Steels</topic><topic>Tribology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Koshigan, K.D.</creatorcontrib><creatorcontrib>Mangolini, F.</creatorcontrib><creatorcontrib>McClimon, J.B.</creatorcontrib><creatorcontrib>Vacher, B.</creatorcontrib><creatorcontrib>Bec, S.</creatorcontrib><creatorcontrib>Carpick, R.W.</creatorcontrib><creatorcontrib>Fontaine, J.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL), Upton, NY (United States)</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>OSTI.GOV</collection><jtitle>Carbon (New York)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Koshigan, K.D.</au><au>Mangolini, F.</au><au>McClimon, J.B.</au><au>Vacher, B.</au><au>Bec, S.</au><au>Carpick, R.W.</au><au>Fontaine, J.</au><aucorp>Brookhaven National Laboratory (BNL), Upton, NY (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings</atitle><jtitle>Carbon (New York)</jtitle><date>2015-11-01</date><risdate>2015</risdate><volume>93</volume><spage>851</spage><epage>860</epage><pages>851-860</pages><issn>0008-6223</issn><eissn>1873-3891</eissn><abstract><![CDATA[Silicon oxide-doped hydrogenated amorphous carbons (a–C:H:Si:O) are amorphous thin films used as solid lubricants in a range of commercial applications, thanks to its increased stability in extreme environments, relative to amorphous hydrogenated carbons (a–C:H). This work aims to develop a fundamental understanding of the environmental impact on the tribology of a–C:H:Si:O. Upon sliding an a–C:H:Si:O film against a steel counterbody, two friction regimes develop: high friction in high vacuum and low gas pressure (oxygen pressure<10mbar; hydrogen pressure<50mbar), and a low friction regime at higher gas pressures (10mbar<oxygen pressure<500mbar; 50mbar<hydrogen pressure<1000mbar). Scanning electron microscopy (SEM) revealed that the tribological behavior of a–C:H:Si:O is governed by adhesive junctions at the sliding interface. At low gas pressures, material transfer from the steel pin to the a–C:H:Si:O flat occurs. At higher gas pressures, a tribofilm forms on the steel countersurface. Raman and near edge X-ray absorption spectroscopy (NEXAFS) spectroscopies demonstrate that upon sliding under the higher gas pressure, low friction regime, a surface layer with an elevated fraction of sp2-bonded carbon atoms forms. These changes indicate that these gases favor the release of the adhesive junctions by dissociatively reacting with the mechanically-stressed sp2 carbon-rich surface layer.]]></abstract><cop>United States</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.carbon.2015.06.004</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Adhesives Carbon Friction Gas pressure Hydrogen storage Sliding Steels Tribology |
| title | Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings |
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