論文

• Lulu Li, Takayuki Tokoroyama, Ruixi Zhang, Wenjun Wu, Xue Fan, Nan Jian, Dongfeng Diao, Noritsugu Umehara. Role of bonding structure in the corrosion resistance and tribological properties of Tantalum-containing carbon coating: An analysis employing various deposition bias voltages, Tribology International, Elsevier, Vol. 213, No. 111014, pp. 1-13, Jan. 2026.
• Ryota Takasaka, Noritsugu Umehara, Takayuki Tokoroyama, Ruixi Zhang, Koichi Okamura, Junichi Fukuda, Tetsuya Hayashi, Kohei Abe, Satoshi Wakamatsu. Abnormal Wear due to Synergistic Effects of Corrosion and Cavitation in High-Speed Flow of Glycol-Based Hydraulic Fluid Valve Surfaces, Tribology Online, Vol. 20, Issue 2, pp. 100-109, June 2025.
• Ruixi Zhang, Dmitry Levshov, Keigo Otsuka, Ya Feng, Yongjia Zheng, Esko I. Kauppinen, Shohei Chiashi, Wim Wenseleers, Sofie Cambré, Rong Xiang, Shigeo Maruyama. Efficient Growth of 1D Van der Waals Heterostructures on Zeolite-Supported SWCNTs, Small, Wiley-VCH, Vol. 21, Issue 8, pp. 1-10, Feb. 2025.
• Wenjun Wu, Motoyuki Murashima, Noritsugu Umehara, Takayuki Tokoroyama, Ruixi Zhang. Low friction of nitrogen-doped diamond-like carbon coating due to acidic liquid film and nitrogen-doped graphite oxide generated by dielectric barrier discharge in ambient air, Surfaces and Interfaces, Elsevier, Vol. 56, No. 105591, pp. 1-10, Jan. 2025.
• Naoya Hashizume, Riki Takano, Noritsugu Umehara, Takayuki Tokoroyama, Ruixi Zhang, Kiyoshi Hanyuda, Ayano Otsuka, Mao Ueda. Development of precipitation lubrication with palmitic acid and its friction mechanism, Tribology International, Elsevier, Vol. 200, No. 110066, pp. 1-8, Dec. 2024.
• Lulu Li, Takayuki Tokoroyama, Ruixi Zhang, Noritsugu Umehara. Corrosion and tribological properties of ta-C/ta-C: Ta coatings: Analysis of the influence of Ta-O/Ta-C ratio, Tribology International, Elsevier, Vol. 198, No. 109916, pp. 1-11, Oct. 2024.
• Takayuki Tokoroyama, Masahiro Okashita, Ruixi Zhang, Motoyuki Murashima, Ryo Tsuboi, Takuji Yoshida, Hiroshi Shiomi, Noritsugu Umehara. The mechanism of small wear particles entrainment in friction under boundary lubrication, Vol. 10, No. 1470312, pp. 1-12, Sept. 2024.
• Ruixi Zhang, Woo-Young Lee, Noritsugu Umehara, Takayuki Tokoroyama, Motoyuki Murashima, Yuji Takimoto. The development of B/Cr co-doped DLC coating by FCVA deposition system and its tribological properties at 300℃, Surface & Coatings Technology, Elsevier, Vol. 487, No. 130968, pp. 1-10, July 2024.
• Naoya Hashizume, Yusei Yamamoto, Cheng Chen, Takayuki Tokoroyama, Ruixi Zhang, Dongfeng Diao, Noritsugu Umehara. The Effect of Carbon Structure of DLC Coatings on Friction Characteristics of MoDTC-Derived Tribofilm by Using an In Situ Reflectance Spectroscopy, Tribology Letters, Vol. 72, No. 30, Feb. 2024.
• Naoya Hashizume, Takayuki Tokoroyama, Noritsugu Umehara, Motoyuki Murashima, Woo-Young Lee, Ruixi Zhang, Masahiro Kunisu, Hirotaka Shioji, Kazumasa Oharada. In situ Observation of the Formation of MoDTC-Derived Tribofilm on a Bearing Steel with Different Surface Roughness by Using a Reflectance Spectroscopy and Its Effects on Friction, Vol. 72, No. 17, pp. 1-17, Jan. 2024.
• Ruixi Zhang, Ya Feng, Henan Li, Akihito Kumamoto, Shuhui Wang, Yongjia Zheng, Wanyu Dai, Nan Fang, Ming Liu, Takeshi Tanaka, Yuichiro K. Kato, Hiromichi Kataura, Yuichi Ikuhara, Shigeo Maruyama, Rong Xiang. Fabricating one-dimensional van der Waals heterostructures on chirality-sorted single-walled carbon nanotubes, Carbon, Vol. 199, pp. 407-414, Oct. 2022.

国際会議発表 (査読有り)

• Ruixi Zhang, Dmitry Levshov, Keigo Otsuka, Esko I. Kauppinen, Shohei Chiashi, Wim Wenseleers, Sofie Cambre, Rong Xiang, Shigeo Maruyama. Improvement in synthesis efficiency of 1D van der Waals Boron Nitride Heteronanotubes on Zeolite-supported SWCNTs at the TEM grid scale, 35th International Conference on Diamond and Carbon Materials, Sept. 2025.
• Kenta Yamamoto, Akane Sakakura, Makoto Kano, Ruixi Zhang, Yuki Hirata. Deposition of ta-C Films on Anisotropically Rough Surface and its Tribological Properties under Biodegradable Oil Lubrication, 35th International Conference on Diamond and Carbon Materials, Sept. 2025.
• Yuki Hirata, Yuya Tamura, Nobuharu Kajiyama, Ruixi Zhang. Sputtering-Annealing Hybrid Process for Synthesis of 2D Materials and van der Waals Heterostructures, 35th International Conference on Diamond and Carbon Materials, Sept. 2025.
• Ruixi Zhang, Daiki Yokota, Takumi Ishikawa, Hiroshige Matsuoka, Yuki Hirata. Multilayer Chromium/DLC Coatings: Synthesis and Tribological Properties, The 6th DLC Symposium - Gifu, 2025, Aug. 2025.
• Ruixi Zhang, Daiki Yasuda, Noritsugu Umehara, Takayuki Tokoroyama. Effect of Hydrogen Doping for ta-C on Friction of ta-C:H Sliding Against Bearing Steel in High Temperature and High Vacuum, Proceedings of ITS-IFToMM 2024. ITS-IFToMM 2024. Mechanisms and Machine Science, Vol. 160, pp. 149-158, June 2024.
• Ruixi Zhang, Haodong Feng, Noritsugu Umehara, Takayuki Tokoroyama. Clarification of the corrosion and frictional behavior of nitrogen-doped ta-C coating in nitride acid solution, Proceedings of ITS-IFToMM 2024. ITS-IFToMM 2024. Mechanisms and Machine Science, Vol. 160, pp. 13-22, June 2024.
• Kousuke Suzuki, Takayuki Tokoroyama, Riko Takita, Ruixi Zhang, Noritsugu Umehara, Shun Sato, Shin Nishida. Enhancing Cutting Tool Performance through ta-C:Ta Coating for CFRP Dry Machining: Investigation of Wear Resistance and Cutting Forces, Proceedings of ITS-IFToMM 2024. ITS-IFToMM 2024. Mechanisms and Machine Science, Vol. 160, pp. 159-167, June 2024.
• Wenjun Wu, Noritsugu Umehara, Takayuki Tokoroyama, Motoyuki Murashima, Ruixi Zhang. Development of Low-Friction Technology for Treating Nitrogen-Containing Diamond-Like Carbon Coatings in Ambient Air Using Dielectric Barrier Discharge, roceedings of ITS-IFToMM 2024. ITS-IFToMM 2024. Mechanisms and Machine Science, Vol. 160, pp. 99–106, June 2024.

国際会議発表 (査読なし・不明)

• Daiki Yokota, Takumi Ishikawa, Hiroshige Matsuoka, Ruixi Zhang, Yuki Hirata. Synthesis and Evaluation of Metal-Doped DLC Films for Enhanced Mechanical and Tribological Performance, 35th International Conference on Diamond and Carbon Materials, Sept. 2025.
• Takahito Imanishi, Ruixi Zhang, Nobuharu Kajiyama, Yuki Hirata. Characterization and Future Prospects of 2D Materials Grown by the SAHP Method, The 6th DLC Symposium - Gifu, 2025, Aug. 2025.
• Shota Zenke, Ruixi Zhang, Kenta Yamamoto, Makoto Kano, Yuki Hirata. Enhancement of Friction and Wear Performance by DLC Films Deposited on Surfaces with Anisotropic Roughness under Biodegradable Oil Lubrication, The 6th DLC Symposium - Gifu, 2025, Aug. 2025.

国内会議発表 (査読なし・不明)

• 張 鋭璽, 横田大樹, 石川功, 松岡広成, 平田 祐樹. クロムの多層構造を介在させたDLC膜における低摩擦特性の実現, トライボロジー会議2025 秋 函館, Oct. 2025.
• 善家昇大, 張 鋭璽, 山本健太, 加納眞, 平田祐樹. 異方的粗さを有する基材へのDLC成膜による環境調和型油潤滑下のトライボロ ジー特性向上, トライボロジー会議2025 秋 函館, Oct. 2025.
• 今西崇士, 張 鋭璽, 梶山直栄, 平田祐樹. SAHP法による二次元材料の合成及び機 能評価, トライボロジー会議2025 秋 函館, Oct. 2025.

その他の論文・著書など

• 橋詰直弥, 髙野理貴, 梅原徳次, 野老山貴行, 張 鋭璽. 「低温析出型潤滑」による摩擦損失低減, JSAE Engine Review, Vol. 14, No. 2, June 2024.

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