2024 T. Tokoroyama, S. Horikawa, J. Mimata, N. Umehara, M. Murashima, “Effect of Water on Wear of DLC Coatings in High Temperature and Pressurized Ethanol,”
Tribology Letters, 72(4), Dec 2024. ↗ 2024 T. Tokoroyama, M. Okashita, R. Zhang, M. Murashima, R. Tsuboi, T. Yoshida, H. Shiomi, N. Umehara, “The mechanism of small wear particles entrainment in friction under boundary lubrication,”
Frontiers in Mechanical Engineering, 10, Sep 2024. ↗ 2024 R. Zhang, W. Y. Lee, N. Umehara, T. Tokoroyama, M. Murashima, Y. Takimoto, “The development of B/Cr co‑doped DLC coating by FCVA deposition system and its tribological properties at 300 °C,”
Surface and Coatings Technology, 487, Jul 2024. ↗ 2024 M. M. B. Mustafa, N. Umehara, T. Tokoroyama, M. Murashima, Y. Utsumi, H. Moriguchi, A. Shibata, “Effect of PAO‑4 and MoDTC + ZnDTP oil additive lubricants on the tribological performance of novel tetrahedral amorphous carbon (ta‑C) coatings,”
Tribology International, 193, May 2024. ↗ 2024 T. Tokoroyama, S. Wang, N. Umehara, M. Murashima, W. Y. Lee, “The ta‑C hardness effect on wear properties under MoDTC‑contained boundary lubrication,”
Tribology Letters, 72(1), Mar 2024. ↗ 2024 N. Hashizume, T. Tokoroyama, N. Umehara, M. Murashima, W. Y. Lee, R. Zhang, M. Kunisu, H. Shioji, K. Oharada, “In situ observation of the formation of MoDTC‑derived tribofilm on a bearing steel with different surface roughness by using reflectance spectroscopy and its effects on friction,”
Tribology Letters, 72(1), Mar 2024. ↗ 2024 T. Tokoroyama, C. Fujiwara, M. Murashima, M. Yamaguchi, N. Umehara, “Effect of the graphite domain direction on the friction coefficient of tetrahedral amorphous carbon nitride,”
Diamond & Related Materials, 143, Mar 2024. ↗ 2024 K. Hirata, M. Murashima, N. Umehara, T. Tokoroyama, W. Y. Lee, N. Hashizume, T. Sato, R. Nagata, K. Hanyuda, A. Otsuka, M. Ueda, “Clarification of the effect of surface energy on tribological behavior of two‑phase lubricant using reflectance spectroscopy and hydrodynamic analysis,”
Tribology Letters, 72(1), Mar 2024. ↗ 2023 K. Hirata, M. Murashima, N. Umehara, T. Tokoroyama, N. Hashizume, W. Y. Lee, D. Takekawa, K. Narita, “Clarification of the effects of adsorption films of ester‑blended oil on friction by in situ reflectance spectroscopy,”
Tribology International, 187, Sep 2023. ↗ 2023 K. Tanaka, T. Tokoroyama, N. Umehara, M. Murashima, T. Oshio, K. Yagishita, “Effects of phosphonate additives with hydroxy groups on the tribological properties of ta‑C coatings under boundary lubrication,”
Tribology Letters, 71(2), Jun 2023. ↗ 2023 Y. Nakashima, N. Umehara, H. Kousaka, T. Tokoroyama, M. Murashima, K. Murakami, “Influence of defects in graphene‑like network of diamond‑like carbon on silica scale adhesion,”
Tribology Letters, 71(1), Feb 2023. ↗ 2023 M. Murashima, T. Yamada, N. Umehara, T. Tokoroyama, W. Y. Lee, “Novel friction stabilization technology for surface damage conditions using machine learning,”
Tribology International, 180, Feb 2023. ↗ 2023 J.‑I. Kim, W.‑Y. Lee, T. Tokoroyama, M. Murashima, N. Umehara, “Tribo‑chemical wear of various 3d‑transition metals against DLC: Influence of tribo‑oxidation and low‑shear transferred layer,”
Tribology International, 177, 107938, Jan 2023. ↗ 2023 Y. Nakashima, N. Umehara, H. Kousaka, T. Tokoroyama, M. Murashima, D. Mori, “Carbon‑based coatings for suppression of silica adhesion in geothermal power generation,”
Tribology International, 177, 107956, Jan 2023. ↗ 2022 T. Tokoroyama, K. Tanaka, T. Kani, M. Murashima, W. Y. Lee, N. Umehara, T. Oshio, K. Yagishita, “The tribological property of a‑C:H coating with tribolayer by additive having glycerol and phosphate oxide structure,”
Tribology Letters, 70(4), Dec 2022. ↗