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  2. Maki Ashida

Maki Ashida

  (蘆田 茉希)

Profile Information

Affiliation
Assistant Professor, Faculty of Science and Technology Department of Science and Technology , Seikei University
Degree
博士（工学）
J-GLOBAL ID
201801006443704147
researchmap Member ID
7000025465

Research Interests

 1

Research Areas

 1

Research History

 2

Awards

 25
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Papers

 53
  • Tomoyo MANAKA, Yusuke TSUTSUMI, Maki ASHIDA, Peng CHEN, Takao HANAWA
    Dental Materials Journal, 43(6) 755-761, Nov 25, 2024  Peer-reviewed
  • Kaveh Edalati, Anwar Q. Ahmed, Saeid Akrami, Kei Ameyama, Valery Aptukov, Rashid N. Asfandiyarov, Maki Ashida, Vasily Astanin, Andrea Bachmaier, Victor Beloshenko, Elena V. Bobruk, Krzysztof Bryła, José María Cabrera, Amanda P. Carvalho, Nguyen Q. Chinh, In-Chul Choi, Robert Chulist, Jorge M. Cubero-Sesin, Gregory Davdian, Muhammet Demirtas, Sergiy Divinski, Karsten Durst, Jiri Dvorak, Parisa Edalati, Satoshi Emura, Nariman A. Enikeev, Ghader Faraji, Roberto B. Figueiredo, Ricardo Floriano, Marjan Fouladvind, Daniel Fruchart, Masayoshi Fuji, Hiroshi Fujiwara, Marcell Gajdics, Diana Gheorghe, Łukasz Gondek, Joaquín E. González-Hernández, Alena Gornakova, Thierry Grosdidier, Jenő Gubicza, Dmitry Gunderov, Liqing He, Oscar Fabian Higuera, Shoichi Hirosawa, Anton Hohenwarter, Zenji Horita, Jelena Horky, Yi Huang, Jacques Huot, Yoshifumi Ikoma, Tatsumi Ishihara, Yulia Ivanisenko, Jae-il Jang, Alberto M. Jorge, Mie Kawabata-Ota, Megumi Kawasaki, Tarek Khelfa, Junya Kobayashi, Lembit Kommel, Anna Korneva, Petr Kral, Natalia Kudriashova, Shigeru Kuramoto, Terence G. Langdon, Dong-Hyun Lee, Valery I. Levitas, Cong Li, Hai-Wen Li, Yongtao Li, Zheng Li, Huai-Jun Lin, Klaus-Dieter Liss, Ying Liu, Diana Maritza Marulanda Cardona, Kenji Matsuda, Andrey Mazilkin, Yoji Mine, Hiroyuki Miyamoto, Suk-Chun Moon, Timo Müller, Jairo Alberto Muñoz, Maxim Yu. Murashkin, Muhammad Naeem, Marc Novelli, Dániel Olasz, Reinhard Pippan, Vladimir V. Popov, Elena N. Popova, Gencaga Purcek, Patricia de Rango, Oliver Renk, Delphine Retraint, Ádám Révész, Virginie Roche, Pablo Rodriguez-Calvillo, Liliana Romero-Resendiz, Xavier Sauvage, Takahiro Sawaguchi, Hadi Sena, Hamed Shahmir, Xiaobin Shi, Vaclav Sklenicka, Werner Skrotzki, Nataliya Skryabina, Franziska Staab, Boris Straumal, Zhidan Sun, Maciej Szczerba, Yoichi Takizawa, Yongpeng Tang, Ruslan Z. Valiev, Alina Vozniak, Andrei Voznyak, Bo Wang, Jing Tao Wang, Gerhard Wilde, Fan Zhang, Meng Zhang, Peng Zhang, Jianqiang Zhou, Xinkun Zhu, Yuntian T. Zhu
    Journal of Alloys and Compounds, 1002 174667-174667, Oct, 2024  Peer-reviewed
  • Taichi Akutsu, Maki Ashida, Shotaro Hisano, Chie Ashida, Eric Des Marias, Shizuka Sutani
    Arts & Communication, 2(2) 1782-1782, May 6, 2024  Peer-reviewed
    Despite the existing research on flow in music education, there remains a lack of researches in understanding children’s flow experiences in the context of playing musical instrument, electronic technological instruments, and other traditional instruments. This study investigates the observable flow experience among young children during their interactions with musical instrument digital interface instruments, violins, and bell-like instruments. The research employed a case study approach, with 20 children aged two to nine (11 females and nine males) participating in the study. In the study, we, as practitioner-researchers, offered workshops for children to experience a variety of traditional and non-traditional musical instruments. Throughout the study, researchers collected 89 video clips for analysis, using four cameras operated by four assistants who were trained to capture children’s flow in a musical context. These monthly sessions, each lasting an average of 60 min, began with the first session dedicated to capturing the very first encounter of children with various musical devices, instruments, and materials. Custodero’s Flow Indicators in Musical Activities captured children’s flow experiences during workshops. The findings included interpretations of the children’s flow experiences as they explored different devices, instruments, and materials, with a particular emphasis on accessibility and developmental considerations within the social context of children’s musical flow.
  • Maki Ashida
    Materials Transactions, 64(8) 1784-1790, Jul, 2023  Peer-reviewedLead authorCorresponding author
  • Yusuke Tsutsumi, Harumi Tsutsumi, Tomoyo Manaka, Peng Chen, Maki Ashida, Hideki Katayama, Takao Hanawa
    COATINGS, 13(3) 627, Mar, 2023  Peer-reviewed
  • Tomoyo Manaka, Yusuke Tsutsumi, Yukyo Takada, Peng Chen, Maki Ashida, Kotaro Doi, Hideki Katayama, Takao Hanawa
    MATERIALS TRANSACTIONS, 64(1) 131-137, Jan, 2023  Peer-reviewed
  • Yuzuki Eda, Tomoyo Manaka, Takao Hanawa, Peng Chen, Maki Ashida, Kazuhiko Noda
    Surface and Interface Analysis, 54(8) 892-898, Aug, 2022  Peer-reviewed
  • Maki Ashida, Minami Hanai, Peng Chen, Takao Hanawa
    MATERIALS TRANSACTIONS, 63(6) 948-956, Jun 1, 2022  Peer-reviewedLead authorCorresponding author
  • Hiromitsu SATO, Peng CHEN, Maki ASHIDA, Yusuke TSUTSUMI, Hiroyuki HARADA, Takao HANAWA
    Dental Materials Journal, 41(3) 421-428, May 25, 2022  Peer-reviewed
  • Tomoyo Manaka, Yusuke Tsutsumi, Peng Chen, Maki Ashida, Hideki Katayama, Takao Hanawa
    Journal of The Electrochemical Society, 168(12) 121505-121505, Dec 1, 2021  Peer-reviewed
  • Tsutsumi Y, Ishimoto T, Oishi T, Manaka T, Chen P, Ashida M, Doi K, Katayama H, Hanawa T, Nakano T
    Additive Manufact, 45 102066, Sep, 2021  Peer-reviewed
  • Masaya Shimabukuro, Tomoyo Manaka, Yusuke Tsutsumi, Kosuke Nozaki, Chen Peng, Maki Ashida, Akiko Nagai, Takao Hanawa
    Zairyo-to-Kankyo, 70(8) 265-270, Aug 10, 2021  Peer-reviewed
  • Tsutsumi H, Tsutsumi Y, Shimabukuro M, Manaka T, Chen P, Ashida M, Ishikawa K, Katayama H, Hanawa T
    Coatings, 11(7) 798-798, Jul, 2021  Peer-reviewed
    Recently, biofilm formation caused by bacterial adhesion and colonization has been recognized as the major cause of failure in orthopedic and dental implant surgeries. In this study, a customized micro-arc oxidation (MAO) treatment technique was developed to obtain desirable antibacterial properties on Ti surfaces. The two-step MAO treatment was applied in the fabrication of specimens with Ag and with/without Zn in their surface oxide layer. In order to simulate practical usage, surface analyses and immersion tests were performed to evaluate the incorporation of Ag and Zn into the resulting oxide layer and ion release behavior, respectively. Additionally, the antibacterial properties of the specimens after long-term immersion in physiological saline were evaluated using Gram-negative facultative anaerobic bacteria. The MAO-treated specimens containing Ag and Zn exhibited excellent antibacterial properties against Escherichia coli, which were sustained even after 6 months of immersion in physiological saline to simulate practical usage. Moreover, the Ag ions released from the surface oxide indicate the antibacterial properties of the specimen in the early stage, while the release of the corrosion products of Zn demonstrates its antibacterial properties in the later stage.
  • Manaka T, Tsutsumi Y, Ashida M, Chen P, Katayama H, Hanawa T
    Mater Trans, 62(6) 788-796, Jun, 2021  Peer-reviewed
  • Shimabukuro M, Tsutsumi H, Tsutsumi Y, Manaka T, Chen P, Ashida M, Ishikawa K, Katayama H, Hanawa T
    Dent Mater J, 40(3) 592-598, May, 2021  Peer-reviewed
    A customized micro arc oxidation (MAO) treatment technique was developed to obtain desirable antibacterial properties on titanium surfaces. The two-step MAO treatment was applied to fabricate a specimen containing both Ag and Zn in its surface oxide layer. Surface analyses and metal-ion release tests were performed to evaluate the presence of Ag and Zn and the ion release behavior for simulating practical usage, respectively. Additionally, the antibacterial properties of the specimens were also evaluated using gram-negative facultative anaerobic bacteria. The MAO-treated specimens containing both Ag and Zn showed excellent antibacterial properties against Escherichia coli, and the properties were sustained even after 28 days of immersion in physiological saline to simulate the living environment.
  • Hiji A, Hanawa T, Yokoi T, Chen P, Ashida M, Kawashita M
    Langmuir, 37(12) 3597-3604, Mar, 2021  Peer-reviewed
  • Tomoyo Manaka, Yusuke Tsutsumi, Maki Ashida, Peng Chen, Hideki Katayama, Takao Hanawa
    Zairyo-to-Kankyo, 69(11) 307-314, Nov 10, 2020  
  • Tsutsumi Y, Muto I, Nakano S, Tsukada J, Manaka T, Chen P, Ashida M, Sugawara Y, Shimojo M, Hara N, Katayama H, Hanawa T
    J Electrochem Soc, 167(14) 141507-141507, Nov, 2020  Peer-reviewed
  • 真中智世, 堤 祐介, 蘆田茉希, 陳 鵬, 片山英樹, 塙 隆夫
    材料と環境, 69(11) 307-314, Nov, 2020  Peer-reviewed
  • Hiji A, Hanawa T, Shimabukuro M, Chen P, Ashida M, Ishikawa K
    Surf Interface Anal, 53(2) 185-193, Oct, 2020  Peer-reviewed
  • Shimabukuro M, Tsutsumi Y, Nozaki K, Chen P, Yamada R, Ashida M, Doi H, Nagai A, Hanawa T
    Dent Materi J, 39(4) 639-647, Aug, 2020  Peer-reviewed
  • Shimabukuro M, Hiji A, Manaka T, Nozaki K, Chen P, Ashida M, Tsutusmi Y, Nagai A, Hanawa T
    J Funct Biomater, 11(2) 44-44, Jun, 2020  Peer-reviewed
    Recently, silver (Ag) and copper (Cu) have been incorporated into a titanium (Ti) surface to realize their antibacterial property. This study investigated both the durability of the antibacterial effect and the surface change of the Ag- and Cu-incorporated porous titanium dioxide (TiO2) layer. Ag- and Cu-incorporated TiO2 layers were formed by micro-arc oxidation (MAO) treatment using the electrolyte with Ag and Cu ions. Ag- and Cu-incorporated specimens were incubated in saline during a period of 0–28 days. The changes in both the concentrations and chemical states of the Ag and Cu were characterized using X-ray photoelectron spectroscopy (XPS). The durability of the antibacterial effects against Escherichia coli (E. coli) were evaluated by the international organization for standardization (ISO) method. As a result, the Ag- and Cu-incorporated porous TiO2 layers were formed on a Ti surface by MAO. The chemical state of Ag changed from Ag2O to metallic Ag, whilst that of Cu did not change by incubation in saline for up to 28 days. Cu existed as a stable Cu2O compound in the TiO2 layer during the 28 days of incubation in saline. The concentrations of Ag and Cu were dramatically decreased by incubation for up to 7 days, and remained a slight amount until 28 days. The antibacterial effect of Ag-incorporated specimens diminished, and that of Cu was maintained even after incubation in saline. Our study suggests the importance of the time-transient effects of Ag and Cu on develop their antibacterial effects.
  • Shimabukuro M, Manaka T, Tsutsumi Y, Nozaki K, Chen P, Ashida M, Nagai A, Hanawa T
    Mater Trans, 61(6) 1143-1148, Jun, 2020  Peer-reviewed
  • Ashida M, Tsutsumi Y, Homma K, Chen P, Shimojo M, Hanawa T
    Mater Trans, 61(4) 776-781, Mar, 2020  Peer-reviewedLead author
  • Masaya Shimabukuro, Yusuke Tsutsumi, Risa Yamada, Maki Ashida, Peng Chen, Hisashi Doi, Kosuke Nozaki, Akiko Nagai, Takao Hanawa
    ACS BIOMATERIALS SCIENCE & ENGINEERING, 5(11) 5623-5630, Nov, 2019  Peer-reviewed
  • Masaya Shimabukuro, Yusuke Tsutsumi, Kosuke Nozaki, Peng Chen, Risa Yamada, Maki Ashida, Hisashi Doi, Akiko Nagai, Takao Hanawa
    Coatings, 9(11) 705-705, Oct 29, 2019  Peer-reviewed
    This study investigated the time transient effect of zinc (Zn) in the porous titanium dioxide formed by micro-arc oxidation (MAO) treatment routinely performed for Zn-containing electrolytes. The aim of our analysis was to understand the changes in both the chemical and biological properties of Zn in physiological saline. The morphology of the Zn-incorporated MAO surface did not change, and a small amount of Zn ions were released at early stages of incubation in saline. We observed a decrease in Zn concentration in the oxide layer because its release and chemical state (Zn2+ compound to ZnO) changed over time during incubation in saline. In addition, the antibacterial property of the Zn-incorporated MAO surface developed at late periods after the incubation process over a course of 28 days. Furthermore, osteogenic cells were able to proliferate and were calcified on the specimens with Zn. The changes related to Zn in saline had non-toxic effects on the osteogenic cells. In conclusion, the time transient effect of Zn in a porous titanium dioxide layer was beneficial to realize dual functions, namely the antibacterial property and osteogenic cell compatibility. Our study suggests the importance of the chemical state changes of Zn to control its chemical and biological properties.
  • Shimabukuro M, Ito H, Tsutsumi Y, Nozaki K, Chen P, Yamada R, Ashida M, Nagai A, Hanawa T
    Metals, 9(11) 1145-1145, Oct, 2019  Peer-reviewed
    The effects of Ti, Nb, Ta, Zr, and Ag on cellular and bacterial adhesion were investigated in this study. Moreover, the relationships between surface compositions, metal ion release behaviors, and biological responses were examined. As a result, MC3T3-E1 cells and S. aureus were able to better attach to Ti and Zr rather than the Nb and Ta specimens. For the Ag specimen, the amount of Ag ions released into Hanks’ solution was the largest among all the specimens. Cellular and bacterial adhesion onto the Ag specimen was inhibited compared with the other specimens, because of Ag ion release. Alternatively, Nb and Ta specimens exhibited specific biological responses. Cellular adhesion on Nb and Ta specimens was similar to that on Ti, while bacterial adhesion on Nb and Ta specimens was inhibited compared with that on Ti. This study proved that Nb and Ta inhibited bacterial adhesion and exhibited no harmful effects on cellular adhesion. In addition, these results indicate that the passive layer on Nb and Ta plays a key role in the inhibition of bacterial adhesion.
  • Iku KAWABATA, Haruki IMAI, Zuisei KANNO, Akemi TETSUMURA, Yusuke TSUTSUMI, Hisashi DOI, Maki ASHIDA, Tohru KURABAYASHI, Takao HANAWA, Toru YAMAMOTO, Takashi ONO
    Dental Materials Journal, 38(4) 638-645, Jul 26, 2019  Peer-reviewed
    Differences in the volumes of artifacts caused by variously shaped titanium objects on magnetic resonance imaging (MRI) were evaluated. Spherical-, square cubic-, and regular tetrahedron-shaped isotropic, and elongated spherical-, elongated cubic-, and elongated tetrahedron-shaped anisotropic objects, with identical volumes, were prepared. Samples were placed on a nickel-doped agarose gel phantom and covered with nickel-nitrate hexahydrate solution. Three-Tesla MR images were obtained using turbo spin echo and gradient echo sequences. Areas with ±30% of the signal intensity of the standard background value were considered artifacts. Sample volumes were deducted from these volumes to calculate the total artifact volumes. Isotropic samples had similar artifact volumes. For anisotropic samples, the artifact volume increased in proportion with the normalized projection area. MRI artifact size can be reduced by high anisotropic designs, and by positioning the long axis of the metal device as parallel as possible to the magnetic field axis.
  • Watanabe K, Ashida M, Masuda T, Kral P, Takizawa Y, Yumoto M, Otagiri Y, Sklenicka V, Hanawa T, Horita Z
    Mater Trans, 60(9) 1785-1791, Jul, 2019  Peer-reviewedCorresponding author
  • Oishi M, Tsutsumi Y, Chen P, Nakaishi M, Ashida M, Doi H, Hanawa T
    Dent. Mater. J., 38(3) 496-504, Jun, 2019  Peer-reviewed
  • Chen P, Aso T, Sasaki R, Ashida M, Tsutsumi Y, Doi H, Hanawa T
    J. Biomed. Mater. Res. A, Jul, 2018  Peer-reviewed
  • Ashida M, Morita M, Tsutsumi Y, Nomura N, Doi H, Chen P, Hanawa T
    Metals, 8(6) 454, Jun, 2018  Peer-reviewedLead author
  • Oishi M, Tsutsumi Y, Chen P, Ashida M, Doi H, Hanawa T
    Surf Interface Anal, 50(5) 587-591, May, 2018  Peer-reviewed
  • Watanabe K, Ashida M, Masuda T, Kral P, Takizawa Y, Yumoto M, Otagiri Y, Sklenicka V, Hanawa T, Horita Z
    J Japan Instit Light Met, 68(1) 9-15, Jan, 2018  Peer-reviewed
  • Chen P, Aso T, Sasaki R, Tsutsumi Y, Ashida M, Doi H, Hanawa T
    J Biomed Nanotechnol, 13(3) 324-336, Mar, 2017  Peer-reviewed
  • Tsustumi Y, Doi H, Nomura N, Ashida M, Chen P, Kawasaki A, Hanawa T
    Mater. Trans., 57(12) 2033-2040, Dec, 2016  Peer-reviewed
    <p>Air-formed surface oxide films on four types of Co-Cr- alloys were characterized using X-ray photoelectron spectroscopy (XPS) and five types of Co-Cr alloys were anodically polarized, to identify the effects of the addition of N, Mo, and W to Co-Cr alloys containing high Cr on the surface composition and corrosion resistance. Co-20Cr-15W-10Ni (ASTM F90), Co-30Cr-6Mo, Co-33Cr-5Mo-0.3N, and Co-33Cr-9W-0.3N were employed for XPS and the above four alloys and another Co-30Cr-6Mo (ASTM F75) were employed for anodic polarization. The surface oxide film on the Co-Cr alloys consisted of oxide species of Co, Cr, Mo, W and/or Ni contains a large amount of OH− with a thickness of 2.6–3.2 nm. Cations existed in the oxide as Co2+, Cr3+, Mo4+, Mo5+, Mo6+, W6+ and Ni2+. Cr and Mo are enriched and Co and Ni are depleted in the surface oxide film. W was enriched in the case of Co-20Cr-15W-10Ni but depleted in the case of Co-33Cr-9W-0.3N. On the other hand, Cr, Mo, W and Ni were enriched and Co was depleted in the substrate alloy just under the surface oxide film in the polished alloy. During rapid formation of the surface oxide film, Cr was preferentially oxidized and the oxidation of Co and Ni delayed, according to the oxidation and reduction potentials of these elements. The Co-Cr alloys essentially have high localized corrosion resistance that is not easily affected by a small change of composition. Co-33Cr-5Mo-0.3N shows higher corrosion resistance compare than conventional Co-Cr alloys.</p>
  • Tsutsumi Y, Ashida M, Nakahara K, Serizawa A, Doi H, Grandini CR, Rocha LA, Hanawa T
    Mater. Trans., 57(12) 2015-2019, Dec, 2016  Peer-reviewed
  • Chen P, Ashida M, Doi H, Tsutsumi Y, Horita Z, Hanawa T
    Mater Trans, 57(12) 2020-2025, Nov, 2016  Peer-reviewed
    <p>In this study, we evaluated the cytocompatibility of high-pressure torsion (HPT)-processed Ti-6Al-7Nb alloys. Grain size of titanium (Ti) alloys decreased from 5 µm (without HPT processing, HPT-0) to ～100 nm (at 2 GPa, HPT-2) or ～70 nm (at 6 GPa, HPT-6) through HPT processing. Cell adhesion, proliferation, and differentiation were evaluated with mouse preosteoblast (MC3T3-E1). A locomotion trend was presented by cells cultured on HPT-2 to compare with other specimens, while, an immobilization trend was presented by cells cultured on HPT-6 to compare with other specimens. Akp2 (alkaline phosphatase 2) expression was higher in cells cultured on HPT-2 than that on HPT-0 and HPT-6, indicating enhanced osteogenic differentiation. Our results demonstrate that HPT-processed Ti-6Al-7Nb alloys offer good cytocompatibility.</p>
  • Kajima Y, Takaichi A, Nakamoto T, Kimura T, Yogo Y, Ashida M, Doi H, Nomura N, Takahashi H, Hanawa T, Wakabayashi N
    J. Mech. Behav. Biomed. Mater., 59 446-458, Jun, 2016  Peer-reviewed
    We aimed to investigate the fatigue strength of Co-Cr-Mo clasps for removable partial dentures prepared by selective laser melting (SLM). The Co-Cr-Mo alloy specimens for tensile tests (dumbbell specimens) and fatigue tests (clasp specimens) were prepared by SLM with varying angles between the building and longitudinal directions (i.e., 0° (TL0, FL0), 45° (TL45, FL45), and 90° (TL90, FL90)). The clasp specimens were subjected to cyclic deformations of 0.25mm and 0.50mm for 10(6) cycles. The SLM specimens showed no obvious mechanical anisotropy in tensile tests and exhibited significantly higher yield strength and ultimate tensile strength than the cast specimens under all conditions. In contrast, a high degree of anisotropy in fatigue performance associated with the build orientation was found. For specimens under the 0.50mm deflection, FL90 exhibited significantly longer fatigue life (205,418 cycles) than the cast specimens (112,770 cycles). In contrast, the fatigue lives of FL0 (28,484 cycles) and FL45 (43,465 cycles) were significantly shorter. The surface roughnesses of FL0 and FL45 were considerably higher than those of the cast specimens, whereas there were no significant differences between FL90 and the cast specimens. Electron backscatter diffraction (EBSD) analysis indicated the grains of FL0 showed preferential close to <001> orientation of the γ phase along the normal direction to the fracture surface. In contrast, the FL45 and FL90 grains showed no significant preferential orientation. Fatigue strength may therefore be affected by a number of factors, including surface roughness and crystal orientation. The SLM process is a promising candidate for preparing tough removable partial denture frameworks, as long as the appropriate build direction is adopted.
  • DOI Hisashi, ASHIDA Maki, TSUTSUMI Yusuke, NOMURA Naoyuki, HANAWA Takao
    THE JOURNAL OF JAPANESE SOCIETY FOR DENTAL MATERIALS AND DEVICES, 35(3) 217-225, May, 2016  Peer-reviewed
    <p>The Co-Cr-Mo alloy is widely applied as a biocompatible metal, because it shows excellent strength and corrosion resistance. Especially, cobalt-chromium alloy of various types has been practically used as an alloy for dental casting. By increasing the N concentration of this alloy, the mechanical properties were improved. In addition, detailed examination also seems to be necessary on the characteristics as the concentration of Cr increases. In this study, mechanical properties and corrosion resistance were considered using a tensile test and an elution test in 1％ lactic acid when N and Cr concentrations of the Co-Cr-Mo alloy were changed. As a result, the ductility was rapidly improved in 0.2〜0.4 mass％ N alloy. Also, as the Cr concentration increased from 32 mass％, the strength increased but it became brittle when it exceeded 36％. Regarding the corrosion resistance, there was no effect of the concentration of N or Cr.</p>
  • Chen P, Nagai A, Tsutsumi Y, Ashida M, Doi H, Hanawa T
    J Biomed Mater Res A, 104(3) 639-651, Mar, 2016  Peer-reviewed
  • Tsutsumi Y, Niinomi M, Nakai M, Shimabukuro M, Ashida M, Chen P, Doi H, Hanawa T
    Metals, 6(4) 76, Mar, 2016  Peer-reviewedInvited
  • Okamoto H, Tsutsumi Y, Watanabe M, Yamakage K, Ashida M, Chen P, Doi H, Miura H, Matsumura M, Hanawa T
    Electrochemistry, 83(12) 1048-1052, Dec, 2015  Peer-reviewed
  • Tsutsumi Y, Nishisaka T, Doi H, Ashida M, Chen P, Hanawa T
    Surf Iinterface anal, 47(13) 1148-1154, Dec, 2015  Peer-reviewed
  • Umezawa T, Chen P, Tsutsumi Y, Doi H, Ashida M, Suzuki S, Moriyama K, Hanawa T
    Dental Materials Journal, 34(5) 713-718, Oct, 2015  
    To confirm similarity of hard tissue compatibility between titanium and zirconium, calcification of MC3T3-E1 cells on titanium and zirconium was evaluated in this study. Mirror-polished titanium (Ti) and zirconium (Zr) disks and zirconium-sputter deposited titanium (Zr/Ti) were employed in this study. The surface of specimens were characterized using scanning electron microscopy and X-ray diffraction. Then, the cellular proliferation, differentiation and calcification of MC3T3-E1 cells on specimens were investigated. The surface of Zr/Ti was much smoother and cleaner than those of Ti and Zr. The proliferation of the cell was the same among three specimens, while the differentiation and calcification on Zr/Ti were faster than those on Ti and Zr. Therefore, Ti and Zr showed the identical hard tissue compatibility according to the evaluation with MC3T3-E1 cells. Sputter deposition may improve cytocompatibility.
  • Ashida M, Sugimoto T, Nomura N, Tsutsumi Y, Chen P, Doi H, Hanawa T
    Mater. Trans., 56(9) 1544-1548, Jul, 2015  Peer-reviewedLead authorCorresponding author
    A large-scale ingot of Zr-1Mo alloy was produced for industrial manufacturing to investigate whether it is possible to produce an ingot with homogeneity. The homogeneous ingot with a chemical composition of Zr-1 mass%Mo was prepared successfully. The microstructure, mechanical properties, and magnetic susceptibility were evaluated. The microstructure showed a coarse colony structure of a plate-like α phase and a thin β phase. An ω phase precipitation was observed in the β phase. Elongation of 23% and magnetic susceptibility of 12.4 × 10−9 m3 kg−1 (0.98 × 10−6 cm3 g−1) were achieved. We found that it is possible to produce a homogeneous large-scale ingot of Zr-1Mo with high elongation and low magnetic susceptibility.
  • Ashida M, Chen P, Doi H, Tsutsumi Y, Hanawa T, Horita Z
    Mater. Sci. Eng. A, 640 449-453, Jun, 2015  Peer-reviewedLead authorCorresponding author
  • Yu M, Chen P, Tsutsumi Y, Doi H, Ashida M, Kasugai S, Hanawa T
    Dent. Mater. J., 33 490-498, Aug, 2014  Peer-reviewed
  • Edalati K, Ashida M, Horita Z, Matsui T, Kato H
    Wear, 310 83-89, Feb, 2014  Peer-reviewed
  • Maki Ashida, Peng Chen, Hisashi Doi, Yusuke Tsutsumi, Takao Hanawa, Zenji Horita
    11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014, 81 1523-1528, 2014  Peer-reviewedLead authorCorresponding author

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