TY - JOUR
T1 - Uniformity of the glassy state of iron-based metallic glassy particles and reproducibility of fabricating microparts
AU - Yamada, Rui
AU - Yodoshi, Noriharu
AU - Nomura, Naoyuki
AU - Saida, Junji
AU - Kawasaki, Akira
N1 - Funding Information:
This work was supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology , Japan, Scientific Research (A) (No. 18H03829 ). We thank Edanz Group ( www.edanzediting.com/ac ) for editing a draft of this manuscript.
Publisher Copyright:
© 2020 The Authors
PY - 2020/6
Y1 - 2020/6
N2 - The uniformity of the glassy state of [(Fe0.5Co0.5)0.75Si0.05B0.2]96Nb4 metallic glassy particles prepared using our own developed technique, called the pulsated orifice ejection method (POEM), was investigated. Differential scanning calorimetry (DSC) results revealed that the thermal histories of the particles prepared from the same batch were almost identical. This suggested that the particles with the same size/volume possessed almost the same glassy state and had advantages as raw materials for microparts. The fabricated final product using our proposed process, termed as micro viscous flow processing, where a single particle is compressed with a precise jig under strictly controlled processing conditions, was confirmed to maintain a fully amorphous structure. DSC scans of each micropart traced nearly the same path, which indicated that their glassy states were still almost identical after processing. The precise control of the temperature and applied load enable the final products to achieve almost the same thermal histories and also geometric shapes. This is the first report that proves the high reproducibility of fabricating Fe-based metallic glassy microparts with high quality. Our proposed sequential process may shed light on a new fabrication technique of microparts using metallic glasses.
AB - The uniformity of the glassy state of [(Fe0.5Co0.5)0.75Si0.05B0.2]96Nb4 metallic glassy particles prepared using our own developed technique, called the pulsated orifice ejection method (POEM), was investigated. Differential scanning calorimetry (DSC) results revealed that the thermal histories of the particles prepared from the same batch were almost identical. This suggested that the particles with the same size/volume possessed almost the same glassy state and had advantages as raw materials for microparts. The fabricated final product using our proposed process, termed as micro viscous flow processing, where a single particle is compressed with a precise jig under strictly controlled processing conditions, was confirmed to maintain a fully amorphous structure. DSC scans of each micropart traced nearly the same path, which indicated that their glassy states were still almost identical after processing. The precise control of the temperature and applied load enable the final products to achieve almost the same thermal histories and also geometric shapes. This is the first report that proves the high reproducibility of fabricating Fe-based metallic glassy microparts with high quality. Our proposed sequential process may shed light on a new fabrication technique of microparts using metallic glasses.
KW - Iron-based metallic glass
KW - Metallic glassy mono-dispersed spherical particles
KW - Micro viscous flow processing
KW - Pulsated orifice ejection method (POEM)
KW - Reproducibility of fabricating microparts
KW - Uniformity of the glassy sate
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U2 - 10.1016/j.matdes.2020.108667
DO - 10.1016/j.matdes.2020.108667
M3 - Article
AN - SCOPUS:85082692289
VL - 191
JO - International Journal of Materials in Engineering Applications
JF - International Journal of Materials in Engineering Applications
SN - 0264-1275
M1 - 108667
ER -