研究等業績 - 原著論文 - 山口　誠

Evaluation of Spatial Distribution of Crystallinity Induced by Local Heating Using Low-Frequency Raman Spectroscopy on Polyether Ether Ketone (PEEK)

Tomoko Numata, Naomoto Ishikawa, Toshihiro Shimada, Keith C. Gordon, Makoto Yamaguchi

Spectrosc. Journal   2 ( 4 ) 341 - 348   2024年12月  [査読有り]

研究論文（学術雑誌）   国際共著

DOI

Quenching high-temperature phase in Cu–Sn alloy system by femtosecond and picosecond laser irradiation

T. Furuichi, H. Seki, T. Kawano, K. Takabayashi, T. Endo, E. Tsuchiya, M. Yamaguchi, Y. Kobayashi, T. Okada, T. Tomita

Applied Physics A: Materials Science and Processing ( Applied Physics A: Materials Science and Processing )  130 ( 11 ) 818-1 - 818-8   2024年11月  [査読有り]

研究論文（学術雑誌）  

DOI

Low-Frequency Raman Spectroscopy on Amorphous Poly(Ether Ether Ketone) (PEEK)

Numata T., Ishikawa N., Shimada T., Keith C Gordon, Yamaguch M.

Materials ( Materials )  17 ( 15 ) 3755 - 3755   2024年08月  [査読有り]

研究論文（学術雑誌）   国際共著

Low-frequency peaks in the Raman spectra of amorphous poly(ether ether ketone) (PEEK) were investigated. An amorphous sample with zero crystallinity, as confirmed by wide-angle X-ray diffraction, was used in this study. In a previous study, two peaks were observed in the low-frequency Raman spectra of the crystallized samples. Among these, the peaks at 135 cm−1 disappeared for the amorphous sample. Meanwhile, for the first time, the peak at 50 cm−1 was observed in the crystallized sample. Similar to the peak at 135 cm−1, the peak at 50 cm−1 disappeared in the amorphous state, and its intensity increased with increasing crystallinity. The origins of the two peaks were associated with the Ph-CO-Ph-type intermolecular vibrational modes in the simulation. This suggests that the Ph-CO-Ph vibrational mode observed in the low-frequency region of PEEK was strongly influenced by the intermolecular order.

DOI

Effect of the graphite domain direction on the friction coefficient of tetrahedral amorphous carbon nitride

T. Tokoroyama, C. Fujiwara, M. Murashima, M. Yamaguchi, N. Umehara

Diamond and Related Materials ( Diamond and Related Materials )  143   110853   2024年03月  [査読有り]

研究論文（学術雑誌）   国内共著

DOI

Surface-polarity-dependent Raman spectra of ultrathin silicon carbide crystal

Takuro Tomita, Yota Bando, Kazumasa Takenaka, Yasuhiro Tanaka, Makoto Yamaguchi, Shin-ichi Nakashima and Tatsuya Okada

Applied Physics A: Materials Science and Processing ( Applied Physics A: Materials Science and Processing )  129 ( 6 ) 420   2023年06月  [査読有り]

研究論文（学術雑誌）  

DOI

Pulse Duration Dependence of Novel Metal Alloying on Fe/Cr/Ni Thin Films by Ultra-Short Pulsed Laser Irradiation

Kawano Taiyoh, Furuichi Taketo, Tsuchiya Eibon, Yamaguchi Makoto, Okada Tatsuya, Kobayashi Yohei, Tomita Takuro

Journal of Laser Micro Nanoengineering ( Journal of Laser Micro Nanoengineering )  18 ( 2 ) 100 - 104   2023年  [査読有り]

研究論文（学術雑誌）  

DOI

A production management method to improve energy efficiency and productivity that incorporates rush orders

Hironori Hibino, Makoto Yamaguchi, Gökan May, and Dimitris Kiritsis

Journal of Advanced Mechanical Design, Systems, and Manufacturing   17 ( 6 ) 22-00084   2022年12月  [査読有り]

研究論文（学術雑誌）   国際共著

Molecular Dynamics Simulation of Poly(Ether Ether Ketone) (PEEK) Polymer to Analyze Intermolecular Ordering by Low Wavenumber Raman Spectroscopy and X-ray Diffraction

Xiaoran Yang,Seiya Yokokura,Taro Nagahama,Makoto Yamaguchi andToshihiro Shimada

Polymers ( Polymers )  14 ( 24 )   2022年12月  [査読有り]

研究論文（学術雑誌）  

Poly(ether ether ketone) (PEEK) is an important engineering plastic and evaluation of its local crystallinity in composites is critical for producing strong and reliable mechanical parts. Low wavenumber Raman spectroscopy and X-ray diffraction are promising techniques for the analysis of crystal ordering but a detailed understanding of the spectra has not been established. Here, we use molecular dynamics combined with a newly developed approximation to simulate local vibrational features to understand the effect of intermolecular ordering in the Raman spectra. We found that intermolecular ordering does affect the low wavenumber Raman spectra and the X-ray diffraction as observed in the experiment. Raman spectroscopy of intermolecular vibration modes is a promising technique to evaluate the local crystallinity of PEEK and other engineering plastics, and the present technique offers an estimation without requiring heavy computational resources.

DOI PubMed

Characterization of Femtosecond Laser-induced Structural Changes in CVD Diamond by Raman Spectroscopy

Takabayashi K.Mimura K. Tomita T., Yamaguchi M.

Journal of Laser Micro Nanoengineering ( Journal of Laser Micro Nanoengineering )  17 ( 2 ) 103 - 106   2022年10月  [査読有り]

研究論文（学術雑誌）   国内共著

DOI

Morphology and structure of diamond-like carbon film induced by picosecond laser ablation

Keisuke Takabayashi, Takashi Takahashi, Eibon Tsuchiya, Kazuki Mimura, Yoshiyuki Yamamoto, Yohei Kobayashi, Takuro Tomita and Makoto Yamaguchi

Applied Physics A: Materials Science and Processing ( Applied Physics A: Materials Science and Processing )  128 ( 9 )   2022年09月  [査読有り]

研究論文（学術雑誌）  

DOI

Raman Studies of Structural Changes in Diamond-like Carbon Films on Si Induced by Ultrafast Laser Ablation

K. Takabayashi, Khaidir Bin Khamaron, T. Tomita, T. Takahashi, Y. Kobayashi, M Yamaguchi

Journal of Laser Micro/Nanoengineering   17 ( 1 ) 1 - 5   2022年07月  [査読有り]

研究論文（学術雑誌）   国内共著

Energy Consumption Rate Evaluation Method Considering Occurrence of Defective Products and Misjudgment of Inspection Machine in Production Line

Hironori Hibino, Takamasa Horikawa, Syungo Arai, Makoto Yamaguchi

International Journal of Automation Technology ( International Journal of Automation Technology )  16 ( 3 ) 309 - 319   2022年05月  [査読有り]

研究論文（学術雑誌）   国内共著

DOI CiNii Research

Evaluation of crystallinity in carbon fiber-reinforced poly(ether ether ketone) by using infrared low frequency Raman spectroscopy

Makoto Yamaguchi, Shoko Kobayasi, Tomoko Numata, Nobuyuki Kamihara, Toshihiro Shimada, Mitsutoshi Jikei, Mikio Muraoka, Jonathan E. Barnsley, Sara J. Fraser-Miller, Keith C. Gordon

Journal of Applied Polymer Science ( Journal of Applied Polymer Science )  139 ( 8 ) 51677   2022年02月  [査読有り]

研究論文（学術雑誌）   国際共著

DOI

A production evaluation method for energy consumption rate considering rush orders

HIBINO Hironori, YAMAGUCHI Makoto, MAY Gökan, KIRITSIS Dimitris

Journal of Advanced Mechanical Design, Systems, and Manufacturing ( 一般社団法人 日本機械学会 )  16 ( 6 ) JAMDSM0065 - JAMDSM0065   2022年  [査読有り]

研究論文（学術雑誌）  

DOI CiNii Research

Anisotropic surface-enhanced Raman scattering in shape-controlled Ag microcoils

Xu Zhao , Kensuke Sakuma , Makoto Yamaguchi , Mikio Muraoka

Materials Letters ( Materials Letters )  300   2021年10月  [査読有り]

研究論文（学術雑誌）  

DOI

Porous graphitic carbon nitride nanoplates obtained by a combined exfoliation strategy for enhanced visible light photocatalytic activity

Wei Liu, Nobuhiro Iwasa, Shinichiro Fujita, Hitoshi Koizumi, Makoto Yamaguchi, Toshihiro Shimada

Applied Surface Science ( Applied Surface Science )  499   2020年01月  [査読有り]

研究論文（学術雑誌）  

DOI

Effect of texture shape on machining performance of textured diamond cutting tool

Noritaka Kawasegi, Takumi Kawashima, Noboru Takano, Noboru Morita, Makoto Yamaguchi, Professor Kazuhitp Nishimura

Precision Engineering   60   21 - 27   2019年11月  [査読有り]

研究論文（学術雑誌）   国内共著

Effect of texture shape on machining performance of textured diamond cutting tool

Noritaka Kawasegi, Takumi Kawashima, Noboru Morita, Kazuhito Nishimura, Makoto Yamaguchi, Noboru Takano

Precision Engineering ( Precision Engineering )  60   21 - 27   2019年11月  [査読有り]

研究論文（学術雑誌）  

DOI

不良率がエネルギ原単位に及ぼす影響の評価

堀川貴正，日比野浩典，新井俊悟，山口誠

スマートプロセス学会誌   8 ( 5 ) 190 - 197   2019年09月  [査読有り]

研究論文（学術雑誌）   国内共著

A study on lot-size dependence of the energy consumption per unit of production throughput concerning variable lot-size

Hironori HIBINO, Takamasa HORIKAWA and Makoto YAMAGUCHI

Journal of Advanced Mechanical Design, Systems, and Manufacturing   13 ( 3 ) No.18-00497   2019年08月  [査読有り]

研究論文（学術雑誌）   国内共著