TY - JOUR
T1 - In-situ FE-SEM observation of the growth behaviors of Fe particles at magmatic temperatures
AU - Mujin, Mayumi
AU - Nakamura, Michihiko
AU - Matsumoto, Megumi
N1 - Funding Information:
The authors thank Yumiko Kodama and Akira Miyake for their technical assistance during the application of FIB. We thank Yuki Kimura and Tomoya Yamazaki for the TEM observation at Hokkaido University. Constructive comments by an anonymous reviewer improved the manuscript. This work was supported by the JSPS KAKENHI [grant numbers JP19K21048 to Mujin, JP16H06348 to Nakamura, and 19K14776 to Matsumoto]; the Grant-in-Aid of Tohoku University Center for Gender Equality Promotion to Mujin; Core Research Cluster of Disaster Science in Tohoku University (Designated National University).
Funding Information:
The authors thank Yumiko Kodama and Akira Miyake for their technical assistance during the application of FIB. We thank Yuki Kimura and Tomoya Yamazaki for the TEM observation at Hokkaido University. Constructive comments by an anonymous reviewer improved the manuscript. This work was supported by the JSPS KAKENHI [grant numbers JP19K21048 to Mujin, JP16H06348 to Nakamura, and 19K14776 to Matsumoto]; the Grant-in-Aid of Tohoku University Center for Gender Equality Promotion to Mujin; Core Research Cluster of Disaster Science in Tohoku University (Designated National University).
Publisher Copyright:
© 2021 The Authors
PY - 2021/4/15
Y1 - 2021/4/15
N2 - To investigate the nucleation and growth behavior of nano- to micro-meter sized crystals in silicate melts, we attempted the high-temperature in-situ observation using field emission-scanning electron microscopy with a heating stage under high- and low- vacuum (9.6 × 10–5 and 60 Pa, respectively). The sub-micrometer sized particles of Fe slightly above the experimentally determined melting point of nanocrystal moved, coalesced via particle attachment, and recrystallized to form grains with sizes of up to a few hundred nanometers in a rhyolitic silicate melt at ~950 °C under high vacuum. In this study, we 1) conducted the first observation of non-classical growth processes of metals up to a few hundred nanometers above the recrystallization temperature of the bulk crystals, and 2) found the melt viscosity and wettability control of crystal mobility by comparing the behavior of Fe and Pt particles on the sample surface originating from the focused ion beam deposits. The increased diffusivity of metals and decreased melt viscosity could have induced the coalescence of bulk-sized crystals at high-temperature. The crystal growth of silicates and oxides via classical pathways was also observed.
AB - To investigate the nucleation and growth behavior of nano- to micro-meter sized crystals in silicate melts, we attempted the high-temperature in-situ observation using field emission-scanning electron microscopy with a heating stage under high- and low- vacuum (9.6 × 10–5 and 60 Pa, respectively). The sub-micrometer sized particles of Fe slightly above the experimentally determined melting point of nanocrystal moved, coalesced via particle attachment, and recrystallized to form grains with sizes of up to a few hundred nanometers in a rhyolitic silicate melt at ~950 °C under high vacuum. In this study, we 1) conducted the first observation of non-classical growth processes of metals up to a few hundred nanometers above the recrystallization temperature of the bulk crystals, and 2) found the melt viscosity and wettability control of crystal mobility by comparing the behavior of Fe and Pt particles on the sample surface originating from the focused ion beam deposits. The increased diffusivity of metals and decreased melt viscosity could have induced the coalescence of bulk-sized crystals at high-temperature. The crystal growth of silicates and oxides via classical pathways was also observed.
KW - A1. Nucleation
KW - A2. Growth from solutions
KW - B1. Glasses
KW - B1. Metals
UR - http://www.scopus.com/inward/record.url?scp=85100895075&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85100895075&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2021.126043
DO - 10.1016/j.jcrysgro.2021.126043
M3 - Article
AN - SCOPUS:85100895075
SN - 0022-0248
VL - 560-561
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
M1 - 126043
ER -