Critical cooling rates of mono-Sized Fe-Based Glassy Particles in [(Fe xCo1-x)o.75B0.2Si0.05] 96Nb4 System

Masahiro Fukue; Noriharu Yodoshi; Rui Yamada; Akira Kawasaki

doi:10.2320/jinstmet.76.573

Critical cooling rates of mono-Sized Fe-Based Glassy Particles in [(Fe _xCo_1-x)o.75B_0.2Si_0.05] ₉₆Nb₄ System

Masahiro Fukue, Noriharu Yodoshi, Rui Yamada, Akira Kawasaki

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Fe based metallic glassy alloys are prospective material for micro parts due to their excellent mechanical properties. In this study we successfully prepared two kinds of [(Fe_xCo_1-x)o.75B _0.2Si_0.05]₉₆Nb₄ (X=0.5 and 0.8) alloy mono-sized spherical particles with various sizes as a raw material for the micro parts by using originally developed process named Pulsated Orifice Ejection Method. Each alloy exhibits different critical diameter for maintaining a glassy phase due to the different glass forming ability. We estimated the critical cooling rates of X= 0.5 and 0.8 alloys to be 1000 K/s and 4000 K/s, respectively from calculation of cooling process during the free fall of the molten alloy droplets in cooling gas. Oxygen contamination amounts of the obtained particles are also investigated for the comparison between the conventional casting process and our new process.

Original language	English
Pages (from-to)	573-578
Number of pages	6
Journal	Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume	76
Issue number	10
DOIs	https://doi.org/10.2320/jinstmet.76.573
Publication status	Published - Oct 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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abstract = "Fe based metallic glassy alloys are prospective material for micro parts due to their excellent mechanical properties. In this study we successfully prepared two kinds of [(FexCo1-x)o.75B 0.2Si0.05]96Nb4 (X=0.5 and 0.8) alloy mono-sized spherical particles with various sizes as a raw material for the micro parts by using originally developed process named Pulsated Orifice Ejection Method. Each alloy exhibits different critical diameter for maintaining a glassy phase due to the different glass forming ability. We estimated the critical cooling rates of X= 0.5 and 0.8 alloys to be 1000 K/s and 4000 K/s, respectively from calculation of cooling process during the free fall of the molten alloy droplets in cooling gas. Oxygen contamination amounts of the obtained particles are also investigated for the comparison between the conventional casting process and our new process.",

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AU - Yamada, Rui

AU - Kawasaki, Akira

PY - 2012/10

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AB - Fe based metallic glassy alloys are prospective material for micro parts due to their excellent mechanical properties. In this study we successfully prepared two kinds of [(FexCo1-x)o.75B 0.2Si0.05]96Nb4 (X=0.5 and 0.8) alloy mono-sized spherical particles with various sizes as a raw material for the micro parts by using originally developed process named Pulsated Orifice Ejection Method. Each alloy exhibits different critical diameter for maintaining a glassy phase due to the different glass forming ability. We estimated the critical cooling rates of X= 0.5 and 0.8 alloys to be 1000 K/s and 4000 K/s, respectively from calculation of cooling process during the free fall of the molten alloy droplets in cooling gas. Oxygen contamination amounts of the obtained particles are also investigated for the comparison between the conventional casting process and our new process.

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Critical cooling rates of mono-Sized Fe-Based Glassy Particles in [(Fe _xCo_1-x)o.75B_0.2Si_0.05] ₉₆Nb₄ System

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