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Okubo Hikaru
Okubo Hikaru
Verified email at ynu.ac.jp
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In situ Raman observation of structural transformation of diamond-like carbon films lubricated with MoDTC solution: Mechanism of wear acceleration of DLC films lubricated with …
H Okubo, S Sasaki
Tribology International 113, 399-410, 2017
622017
Tribological properties of a tetrahedral amorphous carbon (ta-C) film under boundary lubrication in the presence of organic friction modifiers and zinc dialkyldithiophosphate …
H Okubo, C Tadokoro, S Sasaki
Wear 332, 1293-1302, 2015
612015
Effects of concentration of zinc dialkyldithiophosphate on the tribological properties of tetrahedral amorphous carbon films in presence of organic friction modifiers
H Okubo, S Watanabe, C Tadokoro, S Sasaki
Tribology International 94, 446-457, 2016
362016
Frictional properties of DLC films in low-pressure hydrogen conditions
H Okubo, R Tsuboi, S Sasaki
Wear 340, 2-8, 2015
342015
Effects of structure of zinc dialkyldithiophosphates on tribological properties of tetrahedral amorphous carbon f ilm under boundary lubrication
H Okubo, S Watanabe, C Tadokoro, S Sasaki
Tribology International 98, 26-40, 2016
332016
In situ Raman observations of the formation of MoDTC-derived tribofilms at steel/steel contact under boundary lubrication
H Okubo, M Yonehara, S Sasaki
Tribology Transactions 61 (6), 1040-1047, 2018
292018
Wear acceleration mechanism of diamond-like carbon (DLC) films lubricated with MoDTC solution: Roles of tribofilm formation and structural transformation in wear acceleration …
H Okubo, C Tadokoro, T Sumi, N Tanaka, S Sasaki
Tribology International 133, 271-287, 2019
252019
Ultralow friction of a tetrahedral amorphous carbon film lubricated with an environmentally friendly ester-based oil
H Okubo, S Watanabe, C Tadokoro, S Sasaki
Tribology Online 11 (2), 102-113, 2016
252016
Tribo-Raman-SLIM observation for diamond-like carbon lubricated with fully formulated oils with different wear levels at DLC/steel contacts
H Okubo, S Sasaki, D Lancon, F Jarnias, B Thiébaut
Wear 454, 203326, 2020
222020
Tribological performance of halogen-free ionic liquids in steel–steel and DLC–DLC contacts
H Okubo, S Kawada, S Watanabe, S Sasaki
Tribology Transactions 61 (1), 71-79, 2018
222018
In situ raman-SLIM monitoring for the formation processes of MoDTC and ZDDP tribofilms at Steel/Steel contacts under boundary lubrication
H Okubo, C Tadokoro, S Sasaki
Tribology Online 15 (3), 105-116, 2020
202020
Frequency-modulation atomic force microscopic observation for ultralow frictional solid–liquid interface of diamond-like carbon in an environmentally friendly oil
H Okubo, S Sasaki
Tribology Letters 67 (1), 3, 2019
172019
In Situ Raman observation of the graphitization process of tetrahedral amorphous carbon diamond-like carbon under boundary lubrication in poly-alpha-olefin with an organic …
H Okubo, C Tadokoro, Y Hirata, S Sasaki
Tribology Online 12 (5), 229-237, 2017
172017
Effects of hydrogen on frictional properties of DLC films
H Okubo, K Oshima, R Tuboi, C Tadokoro, S Sasaki
Tribology Online 10 (6), 397-403, 2015
162015
Effect of water on the interfacial structures of room‐temperature ionic liquids
S Kawada, E Kodama, K Sato, S Ogawa, M Watanabe, H Okubo, S Sasaki
Surface and Interface Analysis 51 (1), 17-20, 2019
152019
Polarization observations of adsorption behavior of fatty acids using optical anisotropy of liquid crystal
C Tadokoro, S Araya, H Okubo, K Nakano, S Sasaki
Tribology Letters 64, 1-9, 2016
152016
Correlation between nano-mechanical and macro-tribological properties of tribofilms derived from organic phosphoric additives
C Hashimoto, H Okubo, C Tadokoro, S Sasaki
Tribology Online 11 (5), 632-638, 2016
112016
Effects of a twin-screw extruder equipped with a molten resin reservoir on the mechanical properties and microstructure of recycled waste plastic polyethylene pellet moldings
H Okubo, H Kaneyasu, T Kimura, P Phanthong, S Yao
Polymers 13 (7), 1058, 2021
102021
Macroscopic tribological properties of thick concentrated polymer brush on rough steel under lubrication with ionic liquid
K Sato, H Okubo, Y Hirata, C Tadokoro, K Nakano, Y Tsujii, S Sasaki
Jurnal Tribologi 20, 97-113, 2019
92019
Synergy of two fatty acids as additives on lubricity of a nematic liquid crystal 5CB
C Tadokoro, S Araya, M Watanabe, H Okubo, K Nakano, S Sasaki
Lubrication Science 30 (3), 83-90, 2018
92018
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