Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film
This research studied the effects of Zinc Dialkyldithiophosphate (ZnDTP) additives on the tribological properties of a H-free Diamond-like Carbon (DLC) film under boundary lubrication with oils that contained organic friction modifiers (FMs). The tribological properties were evaluated using the reci...
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2015-02-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/81/824/81_14-00656/_pdf/-char/en |
| _version_ | 1797988676217602048 |
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| author | Hikaru OKUBO Ryo TSUBOI Chiharu TADOKORO Shinya SASAKI |
| author_facet | Hikaru OKUBO Ryo TSUBOI Chiharu TADOKORO Shinya SASAKI |
| author_sort | Hikaru OKUBO |
| collection | DOAJ |
| description | This research studied the effects of Zinc Dialkyldithiophosphate (ZnDTP) additives on the tribological properties of a H-free Diamond-like Carbon (DLC) film under boundary lubrication with oils that contained organic friction modifiers (FMs). The tribological properties were evaluated using the reciprocating type cylinder-on-disk tribo-tester. ZnDTP and three types of organic additives (GMO, glycerol mono-oleoyl ether (GME), and tallow diethanol amine (TDEA)) were added to poly-alpha olefin (PAO). Friction tests were carried out for the DLC/Steel tribo-pair under lubrication with PAO and PAO-based oils containing GMO, GME, TDEA, ZnDTP, GMO + ZnDTP, GME + ZnDTP, and TDEA + ZnDTP additives. Raman spectroscopy, Scanning Electron Microscopy (SEM), energy-dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS) were used for analyses of worn surface on the H-free DLC film. The H-free DLC film lubricated with PAO + FMs reached an ultralow friction coefficient of 0.02 - 0.03. On the other hand, The H-free DLC film lubricated with PAO + FMs + ZnDTP had increased friction coefficients compared to the PAO + FMs oils. For the lubrication added ZnDTP additive, the surface analyses demonstrated that the chemical composition of the ZnDTP-derived tribofilm depended on the combination of ZnDTP and each FM. It was concluded that the chemical composition of the ZnDTP-derived tribofilm played an important role in the friction behavior of the H-free DLC films that were lubricated with PAO + ZnDTP and PAO + FMs + ZnDTP. |
| first_indexed | 2024-04-11T08:06:48Z |
| format | Article |
| id | doaj.art-4e60317436094203b5fbceb3bb3ed894 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:06:48Z |
| publishDate | 2015-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-4e60317436094203b5fbceb3bb3ed8942022-12-22T04:35:29ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612015-02-018182414-0065614-0065610.1299/transjsme.14-00656transjsmeEffects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC filmHikaru OKUBO0Ryo TSUBOI1Chiharu TADOKORO2Shinya SASAKI3Graduate School, Tokyo University of ScienceDaido UniversityTokyo University of ScienceTokyo University of ScienceThis research studied the effects of Zinc Dialkyldithiophosphate (ZnDTP) additives on the tribological properties of a H-free Diamond-like Carbon (DLC) film under boundary lubrication with oils that contained organic friction modifiers (FMs). The tribological properties were evaluated using the reciprocating type cylinder-on-disk tribo-tester. ZnDTP and three types of organic additives (GMO, glycerol mono-oleoyl ether (GME), and tallow diethanol amine (TDEA)) were added to poly-alpha olefin (PAO). Friction tests were carried out for the DLC/Steel tribo-pair under lubrication with PAO and PAO-based oils containing GMO, GME, TDEA, ZnDTP, GMO + ZnDTP, GME + ZnDTP, and TDEA + ZnDTP additives. Raman spectroscopy, Scanning Electron Microscopy (SEM), energy-dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS) were used for analyses of worn surface on the H-free DLC film. The H-free DLC film lubricated with PAO + FMs reached an ultralow friction coefficient of 0.02 - 0.03. On the other hand, The H-free DLC film lubricated with PAO + FMs + ZnDTP had increased friction coefficients compared to the PAO + FMs oils. For the lubrication added ZnDTP additive, the surface analyses demonstrated that the chemical composition of the ZnDTP-derived tribofilm depended on the combination of ZnDTP and each FM. It was concluded that the chemical composition of the ZnDTP-derived tribofilm played an important role in the friction behavior of the H-free DLC films that were lubricated with PAO + ZnDTP and PAO + FMs + ZnDTP.https://www.jstage.jst.go.jp/article/transjsme/81/824/81_14-00656/_pdf/-char/entribologydaiamond-like carbonta-czndtpfmgmotdeagmeboundary lubrication |
| spellingShingle | Hikaru OKUBO Ryo TSUBOI Chiharu TADOKORO Shinya SASAKI Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film Nihon Kikai Gakkai ronbunshu tribology daiamond-like carbon ta-c zndtp fm gmo tdea gme boundary lubrication |
| title | Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film |
| title_full | Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film |
| title_fullStr | Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film |
| title_full_unstemmed | Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film |
| title_short | Effects of ZnDTP on lubricity of ashless friction modifiers for H-free DLC film |
| title_sort | effects of zndtp on lubricity of ashless friction modifiers for h free dlc film |
| topic | tribology daiamond-like carbon ta-c zndtp fm gmo tdea gme boundary lubrication |
| url | https://www.jstage.jst.go.jp/article/transjsme/81/824/81_14-00656/_pdf/-char/en |
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