Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment
To investigate the mechanism of surface modification of pure iron by atmospheric pressure plasma treatment (APPT), the surface wettability of pure iron was characterized by using a contact-angle measuring instrument, and the mechanical properties of pure iron were measured by a tensile testing machi...
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MDPI AG
2020-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/21/4775 |
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| author | Jinxing Kong Dongxing Du Aisheng Song Fan Zhang Wen Huang |
| author_facet | Jinxing Kong Dongxing Du Aisheng Song Fan Zhang Wen Huang |
| author_sort | Jinxing Kong |
| collection | DOAJ |
| description | To investigate the mechanism of surface modification of pure iron by atmospheric pressure plasma treatment (APPT), the surface wettability of pure iron was characterized by using a contact-angle measuring instrument, and the mechanical properties of pure iron were measured by a tensile testing machine and nanoindentation instrument. Molecular dynamics simulations were used to explain the modification mechanism of the surface wettability and the mechanical behavior of pure iron by APPT. The experimental results show that pure iron treated by APPT is superhydrophilic, with reduced tensile strength and surface hardness. This result agrees with the molecular dynamics simulation, which shows that the pure iron material hydrophilicity improved after APPT. The behavior was attributed to the formation of hydrogen bonds on the surface of the pure iron after APPT. The surface binding energy of the pure iron material increased between the water molecule and the residual N atom that was induced by APPT. The N atom that was introduced by the APPT led to Fe bond fracture, and the N atom reduced the Fe bond strength, which resulted in a reduction of material yield strength and microhardness. |
| first_indexed | 2024-03-10T15:19:44Z |
| format | Article |
| id | doaj.art-6234993277ff47e2a19cc15c5d354e40 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T15:19:44Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6234993277ff47e2a19cc15c5d354e402023-11-20T18:36:18ZengMDPI AGMaterials1996-19442020-10-011321477510.3390/ma13214775Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma TreatmentJinxing Kong0Dongxing Du1Aisheng Song2Fan Zhang3Wen Huang4Institute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621999, ChinaInstitute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621999, ChinaState Key Laboratory of Tribology, Tsinghua University, Beijing 100084, ChinaInstitute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621999, ChinaInstitute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621999, ChinaTo investigate the mechanism of surface modification of pure iron by atmospheric pressure plasma treatment (APPT), the surface wettability of pure iron was characterized by using a contact-angle measuring instrument, and the mechanical properties of pure iron were measured by a tensile testing machine and nanoindentation instrument. Molecular dynamics simulations were used to explain the modification mechanism of the surface wettability and the mechanical behavior of pure iron by APPT. The experimental results show that pure iron treated by APPT is superhydrophilic, with reduced tensile strength and surface hardness. This result agrees with the molecular dynamics simulation, which shows that the pure iron material hydrophilicity improved after APPT. The behavior was attributed to the formation of hydrogen bonds on the surface of the pure iron after APPT. The surface binding energy of the pure iron material increased between the water molecule and the residual N atom that was induced by APPT. The N atom that was introduced by the APPT led to Fe bond fracture, and the N atom reduced the Fe bond strength, which resulted in a reduction of material yield strength and microhardness.https://www.mdpi.com/1996-1944/13/21/4775atmospheric pressure plasma treatmentpure ironsurface wettabilitytensile propertynanomechanicsmolecular dynamics simulation |
| spellingShingle | Jinxing Kong Dongxing Du Aisheng Song Fan Zhang Wen Huang Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment Materials atmospheric pressure plasma treatment pure iron surface wettability tensile property nanomechanics molecular dynamics simulation |
| title | Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment |
| title_full | Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment |
| title_fullStr | Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment |
| title_full_unstemmed | Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment |
| title_short | Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment |
| title_sort | surface physical and chemical modification of pure iron by using atmospheric pressure plasma treatment |
| topic | atmospheric pressure plasma treatment pure iron surface wettability tensile property nanomechanics molecular dynamics simulation |
| url | https://www.mdpi.com/1996-1944/13/21/4775 |
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