Details of a Researcher - Yan, Jiwang

　

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Updated on 2022/11/17

Yan, Jiwang

写真a

Affiliation: Faculty of Science and Technology, Department of Mechanical Engineering （Yagami）

Position: Professor

Related Websites

http://www.yan.mech.keio.ac.jp/

External Links

Profile Summary 【 Display / hide 】

To create new products with high added value, we are conducting R&D on high-accuracy, high-efficiency, resource-saving manufacturing technologies through micro/nanometer-scale material removal, deformation, and property control. Our recent research focuses on ultra-precision mechanical fabrication, micro-nano forming/imprinting, micro electrical machining, laser machining, laser recovery, and laser Raman spectroscopy.

Career 【 Display / hide 】

2000.04

-

2001.09

Research Associate, Tohoku University, Graduate School of Engineering
2001.10

-

2005.03

Associate Professor, Kitami Institute of Technology
2005.04

-

2007.03

Associate Professor, Tohoku University, Graduate School of Engineering
2007.04

-

2012.03

Associate Professor, Tohoku University, Graduate School of Engineering
2008.02

-

2008.04

Sydney University, Japan-Australia Exchange Researcher

Academic Background 【 Display / hide 】

1991.07

Jilin University, Faculty of Engineering, Department of Mechanical Engineering

University, Graduated
1994.03

Jilin University, Graduate School, Division of Engineering, Department of Mechanical Engineering

Graduate School, Completed, Master's course
1996.01

Tsinghua University, Graduate School, Division of Engineering, Department of Precision Instruments and Mechanology

Graduate School, Withdrawal before completion, Doctoral course
2000.03

Tohoku University, Graduate School, Division of Engineering, Department of Mechatronics and Precision Engineering

Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide 】

Ph.D., Tohoku University, Coursework, 2000.03

Research Areas 【 Display / hide 】

Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Manufacturing and production engineering (Precision Engineering/Mechanical manufacturing)
Nanotechnology/Materials / Material processing and microstructure control (Material Processing/Treatment)
Nanotechnology/Materials / Nano/micro-systems (Micro/Nanodevice)
Nanotechnology/Materials / Composite materials and interfaces (Applied Physical Properties/Crystal Engineering)

Research Keywords 【 Display / hide 】

Ultraprecision machining
Micro/nano manufacturing
Laser processing
Electrical discharge machining
Nanomechanics

Books 【 Display / hide 】

Multidisciplinary Science in Micro/Nanoscale Manufacturing

J. Yan (Guest editor), Elsevier B.V., 2020.12

Scope: International Journal of Machine Tools and Manufacture, Volume 159 (Special Issue)
Micro and Nanoscale Laser Processing of Hard Brittle Materials

J. Yan and N. Takayama, Elsevier B.V., 2019.11, Page： 242

Scope: 1-242
Recent Developments of Silicon Anodes for Lithium Ion Batteries

J. Yan, CMC Publishing CO., LTD. , 2019.11, Page： 251

Scope: Chapter 3: Micro Pillar Generation by Laser Irradiation on Waste Silicon Powder and Its Electrode Characteristics, 20-33
Micro and Nano Fabrication Technology

J. Yan (ed.), Springer Nature Singapore Pte Ltd., 2018.05

Scope: 1-959
Micro and Nano Fabrication Technology, J. Yan (ed.)

M. Mukaida, J. Yan, Springer Nature Singapore Pte Ltd., 2018.05

Scope: Chapter 7: Tool-Servo Driven Diamond Turning for Structured Surface, 215-244

Papers 【 Display / hide 】

Surface hardening of Zr-based metallic glass via laser surface alloying with silicon powder

Zhang D., Qian Y., Zhang L., Huang H., Yan J.

Scripta Materialia （Scripta Materialia) 220 2022.11

ISSN 13596462

　View Summary

Increasing the hardness and wear resistance of metallic glasses (MGs) is beneficial to prolong their service life in highly aggressive environments. For the purpose of achieving surface hardening, in this work, laser surface alloying technology was employed to modify Zr-based MG with silicon powder as the pre-placed powder. The experimental results showed that the laser alloyed layer with thickness of several tens of micrometers was generated on the MG substrate. The surface hardness of the laser alloyed layers ranged from 11.34 to 17.97 GPa, which was significantly higher than that of the as-cast MG surface (6.36 GPa). Furthermore, the scratch resistance of the laser alloyed layer was improved compared to the as-cast sample. The chemical composition analysis indicated that the laser alloyed layer was mainly composed of in-situ formed ZrSi2 phase and residual Si, and these hard phases were responsible for the high hardness of the laser alloyed layer.
- Access to Document (DOI)
Formation, evolution and characterization of nanoporous structures on the Ti6Al4V surface induced by nanosecond pulse laser irradiation

Wang C., Huang H., Zhang Z., Zhang L., Yan J., Ren L.

Materials and Design （Materials and Design) 223 2022.11

ISSN 02641275

　View Summary

Manipulating materials at nanoscale is challenging but rewarding. Nanostructures exhibit some unique properties distinguished from macroscopic bulk materials, so fabrication of nanostructures on the material surface is beneficial to broaden their functional applications. In this study, by nanosecond pulse laser irradiation in nitrogen atmosphere, it was found that unique nanoporous structures could be formed on the Ti6Al4V surface. The effects of laser parameters including the laser power, overlap rate, scanning speed, and repetition frequency on the formation and evolution of the nanoporous structures were systematically investigated. By changing the laser parameters, the nanoporous structures with various porosities could be easily achieved on the Ti6Al4V surface. According to the structural evolution and chemical composition, the formation mechanism of the nanoporous structures was discussed. Furthermore, by characterizing the micro-mechanical properties and wettability, it was found that the surface with nanoporous structures exhibited similar surface hardness but improved tribological performances compared to the original Ti6Al4V surface, and the surface wettability could be tuned. This study provides a simple method for fabricating nanoporous structures on the Ti6Al4V surface, which would broaden its functional applications.
- Access to Document (DOI)
Study on nano-graphitic carbon coating on Si mold insert for precision glass molding

Zhang L., Yan J.

Surface and Coatings Technology （Surface and Coatings Technology) 448 2022.10

ISSN 02578972

　View Summary

Precision glass molding is an efficient and promising technique for large-volume micro-optical manufacturing. Even though significant progress in precision glass molding has been achieved on the anti-adhesive coating, technical challenges and barriers still exist towards tailoring the coating layer to ensure durability and long-term processing consistency in numerous molding cycles. This manuscript presents a novel molding technique utilizing micro-patterned Si mold inserts coated with a newly developed nano-graphitic carbon coating as an isolation layer in high-precision glass molding. The coating is prepared by atmospheric pressure chemical vapor deposition (APCVD), in which the liquid benzene and silicone rubber are used as the carbon source and silicon oxycarbide (SiOC) source, respectively. The nano-morphologies of the nano-graphitic carbon coating with different conditions are characterized and analyzed, illustrating notable differences in surface features with the addition of silicone rubber and various growth durations. In the demonstration, the nano-graphitic carbon-coated Si mold inserts exhibit unique properties, including anti-adhesive and hydrophobic at elevated temperatures. Two kinds of micro-patterned Si mold inserts, a micro-pillar matrix and a micro-lens array, generated by UV lithography and diamond turning, are utilized to demonstrate the feasibility of the anti-adhesive coating in precision glass molding. The obtained results indicate that the micro-optical features on the coated Si mold inserts are successfully transferred to glass substrates with high replication fidelity without notable signs of adhesion or contamination in repetitive molding cycles. This emerging technology makes Si an alternative mold material with low surface adhesion, enhances micro-optical machining efficiency, and replicates high-precision, low-cost micro-optics on large scales that were previously unavailable.
- Access to Document (DOI)
On the conversion of point-to-linear hierarchical micro/nano-structures on the glassy carbon surface by nanosecond pulsed laser irradiation

Wang C., Zhang H., Huang H., Zhang Z., Zhang L., Yan J.

Applied Surface Science （Applied Surface Science) 599 2022.10

ISSN 01694332

　View Summary

Fabrication of microstructures on the glassy carbon (GC) surface is crucial for its functional applications. However, due to its intrinsic mechanical, physical, and chemical properties, it is still challenging to fabricate hierarchical micro/nano-structures on the GC surface. In this study, by tuning the interval between adjacent points as well as the irradiation time, the conversion from the point to linear hierarchical micro/nano-structures was successfully achieved on the GC surface by nanosecond pulsed laser irradiation. The detailed conversion process and mechanism were explored and discussed. On this basis, the linear hierarchical micro/nano-structures were fabricated by direct line scanning, and the internal nanostructures were always parallel to the laser scanning direction. By repeated line scanning with relatively low laser fluence, the method of direct line scanning was further improved, and well-defined and uniform hierarchical micro/nano-structures were fabricated.
- Access to Document (DOI)
Towards understanding the mechanism of vibration-assisted cutting of monocrystalline silicon by cyclic nanoindentation

Huang W., Yan J.

Journal of Materials Processing Technology （Journal of Materials Processing Technology) 311 2022.10

ISSN 09240136

　View Summary

Ultrasonic vibration cutting (UVC) is a promising technology that can promote the processing of hard-brittle materials in ductile mode. The feature of intermittent cutting in UVC is considered to promote the ductile responses of brittle materials. However, the effect of cyclic loading/impact on microscopic deformation behavior of the workpiece material in UVC is not clearly understood. This study used cyclic nanoindentation to reveal the UVC mechanism in monocrystalline silicon (Si). The surface morphology and subsurface microstructure of the residual indents were characterized and compared with those of the UVC-machined grooves. This work attempted to correlate the tool-workpiece contacts for cyclic nanoindentation and vibration cutting. Cyclic nanoindentation results show that cyclic loading promotes the extent of silicon amorphization and decreases the threshold for transitioning the β–Sn phase to the bc8 and r8 phases. As the number of indentation cycles increases, the subsurface microstructure changes from the amorphous phase to the bc8 and r8 phases. In UVC, both the critical cutting depth for brittle-to-ductile transition and the degree of amorphization in cutting chips increase in comparison to conventional cutting, which matches the trend of cyclic nanoindentation results. The findings inform the chip formation and subsurface deformation mechanisms of brittle materials during UVC.
- Access to Document (DOI)

Reviews, Commentaries, etc. 【 Display / hide 】

Ultraprecision ductile mode machining of hard brittle materials

J. Yan

Journal of the Japan Society of Mechanical Engineers 125 ( 1247 ) 11 - 14 2022.10

Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Corresponding author
Ultrasonic vibration-assisted grinding of carbon-based difficult-to-cut materials

J. Yan

Journal of the Japan Society for Precision Engineering 88 ( 7 ) 541 - 545 2022.07

Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Corresponding author
Electrochemical Machining on an EDM Machine for Fine Finishing of Micro Grooves

J. Yan

Die and Mould Technology 37 ( 4 ) 14 - 17 2022.04

Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Joint Work, Lead author, Corresponding author
EDM/Grinding Hybrid Machining of Single-crystal SiC using Poly-crystal Diamond Tools

J. Yan

Journal of the Japan Society for Abrasive Technology 65 ( 12 ) 650 - 653 2021.12

Article, review, commentary, editorial, etc. (scientific journal), Single Work
EDM/ECM hybrid machining for generating microgrooves

R. Kishi, J. Yan

Electrical Machining Technology 45 ( 140 ) 1 - 6 2021.06

Article, review, commentary, editorial, etc. (scientific journal), Joint Work

Presentations 【 Display / hide 】

Laser-induced periodic surface structures generation on single-crystal 4H-SiC by femtosecond pulsed infrared laser irradiation

T. Meshram, J. Yan

The 19th International Conference on Precision Engineering (ICPE2022) (Singapore) ,

2022.11

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2022.12
,
Oral presentation (general)
Cutting of Microgrooves on Ferrous Metal by Using Laser-Processed cBN Tools

D. Kitagawa, T. Meshram, J. Yan

The 19th International Conference on Precision Engineering (ICPE2022) (Singapore) ,

2022.11

-

2022.12
,
Oral presentation (general)
Effect of dopant concentration on femtosecond pulsed laser processing characteristics of yttria-stabilized zirconia

Y. Yamamuro, T. Shimoyama, J. Yan

The 19th International Conference on Precision Engineering (ICPE2022) (Singapore) ,

2022.11

-

2022.12
,
Oral presentation (general)
A Novel Calibration Method of Machining Misalignment in FTS-Based Diamond Turning

S. Tanikawa, J. Yan

The 9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022) (Singapore) ,

2022.11
,
Oral presentation (general)
Fabrication of optical surfaces on polymethyl methacrylate by ultra-precision diamond turning

M. Shimizu, J. Yan

The 9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022) (Singapore) ,

2022.11
,
Oral presentation (general)

Awards 【 Display / hide 】

Machine Tool Technology Promotion Award

S. Kasai, T. Sodetai, J. Yan, 2021.06, 工作機械技術振興財団, 炭素拡散反応を用いた形彫り放電加工による多結晶ダイヤモンドの３次元形状創製

Type of Award： Award from publisher, newspaper, foundation, etc.
Machine Tool Technology Promotion Award

K. Nagayama, J. Yan, 2021.06, 工作機械技術振興財団, Measurement and Compensation of Tool Contour Error Using White Light Interferometry for Ultra-Precision Diamond Turning of Freeform Surfaces

Type of Award： Award from publisher, newspaper, foundation, etc.
JSME Medal for Outstanding Paper

T. Terabayashi, J. Yan, 2021.04, The Japan Society of Mechanical Engineers, Ultra-precision cutting of roll molds having two-directional wavy microstructures

Type of Award： Award from Japanese society, conference, symposium, etc.
PRESM2020 Best Paper Award

A. Nakajima, J. Yan, 2020.10, International Symposium on Precision Engineering and Sustainable Manufacturing (PRESM2020), Response of Resin Coating Films Containing Fine Metal Particles to Ultrashort Laser Pulses

Type of Award： Award from international society, conference, symposium, etc., Country： Korea, Republic of
Outstanding Paper Award

Z. Zhang, J. Yan, T. Kuriyagawa, 2020.09, International Journal of Extreme Manufacturing (IJEM), IoP publishing, Manufacturing technologies toward extreme precision

Type of Award： Honored in official journal of a scientific society, scientific journal

Courses Taught 【 Display / hide 】

ULTRAPRECISION MACHINING AND METROLOGY

2022
SPECIAL LECTURE SERIES ON MULTIDISCIPLINARY AND DESIGN SCIENCE

2022
PRECISION MACHINING

2022
MID-TERM INTERNSHIP

2022
LONG-TERM INTERNSHIP

2022

Memberships in Academic Societies 【 Display / hide 】

The Japan Society of Mechanical Engineers,

1997.04

-

Present
The Japan Society for Precision Engineering,

1997.04

-

Present
The Japan Society for Abrasive Technology,

2000.04

-

Present
Japan Society for Applied Physics (JSAP),

2004.04

-

Present
Japan Laser Processing Society (JLPS),

2009.01

-

Present

Committee Experiences 【 Display / hide 】

2022.05

-

Present

Director, Japan Society of Laser Technology (JSLT)
2022.03

-

Present

Director, Executive Director, Chairman of Publication Sector, Chairman of Journal Review Board, Japan Society of Precision Engineering (JSPE)
2019.04

-

2022.03

Journal Editorial Commitee Member, 日本機械学会
2019.01

-

Present

Editorial Board Member, International Journal of Extreme Manufacturing
2018.04

-

Present

Editorial Board Member, Journal of Micromanufacturing