Smoothing metallic glasses without introducing crystallization by gas cluster ion beam

Lin Shao; Di Chen; Michael Myers; Jing Wang; Buddhi Tilakaratne; Dharshana Wijesundera; Wei Kan Chu; Guoqiang Xie; Arezoo Zare; Don A. Lucca

doi:10.1063/1.4794540

Smoothing metallic glasses without introducing crystallization by gas cluster ion beam

Lin Shao, Di Chen, Michael Myers, Jing Wang, Buddhi Tilakaratne, Dharshana Wijesundera, Wei Kan Chu, Guoqiang Xie, Arezoo Zare, Don A. Lucca

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

8 Citations (Scopus)

Abstract

We show that 30 keV Ar cluster ion bombardment of Ni_52.5Nb ₁₀Zr₁₅Ti₁₅Pt_7.5 metallic glass (MG) can remove surface mountain-like features and reduce the root mean square surface roughness from 12 nm to 0.7 nm. X-ray diffraction analysis reveals no crystallization after cluster ion irradiation. Molecular dynamics simulations show that, although damage cascades lead to local melting, the subsequent quenching rate is a few orders of magnitude higher than the critical cooling rate for MG formation, thus the melted zone retains its amorphous nature down to room temperature. These findings can be applied to obtain ultra-smooth MGs without introducing crystallization.

Original language	English
Article number	101604
Journal	Applied Physics Letters
Volume	102
Issue number	10
DOIs	https://doi.org/10.1063/1.4794540
Publication status	Published - 2013 Mar 11

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Smoothing metallic glasses without introducing crystallization by gas cluster ion beam. / Shao, Lin; Chen, Di; Myers, Michael; Wang, Jing; Tilakaratne, Buddhi; Wijesundera, Dharshana; Chu, Wei Kan; Xie, Guoqiang; Zare, Arezoo; Lucca, Don A.

In: Applied Physics Letters, Vol. 102, No. 10, 101604, 11.03.2013.

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

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title = "Smoothing metallic glasses without introducing crystallization by gas cluster ion beam",

abstract = "We show that 30 keV Ar cluster ion bombardment of Ni52.5Nb 10Zr15Ti15Pt7.5 metallic glass (MG) can remove surface mountain-like features and reduce the root mean square surface roughness from 12 nm to 0.7 nm. X-ray diffraction analysis reveals no crystallization after cluster ion irradiation. Molecular dynamics simulations show that, although damage cascades lead to local melting, the subsequent quenching rate is a few orders of magnitude higher than the critical cooling rate for MG formation, thus the melted zone retains its amorphous nature down to room temperature. These findings can be applied to obtain ultra-smooth MGs without introducing crystallization.",

author = "Lin Shao and Di Chen and Michael Myers and Jing Wang and Buddhi Tilakaratne and Dharshana Wijesundera and Chu, {Wei Kan} and Guoqiang Xie and Arezoo Zare and Lucca, {Don A.}",

note = "Funding Information: This study was supported by National Science Foundation (USA) through Grant Nos. 1130589 and 1130606. This study was also partially supported by the State of Texas through Texas Center for Superconductivity at University of Houston. We acknowledge the Texas A&M Supercomputing Facility (http://sc.tamu.edu/) for providing computing resources in conducting the research reported in this paper.",

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AU - Shao, Lin

AU - Chen, Di

AU - Myers, Michael

AU - Wang, Jing

AU - Tilakaratne, Buddhi

AU - Wijesundera, Dharshana

AU - Chu, Wei Kan

AU - Xie, Guoqiang

AU - Zare, Arezoo

AU - Lucca, Don A.

N1 - Funding Information: This study was supported by National Science Foundation (USA) through Grant Nos. 1130589 and 1130606. This study was also partially supported by the State of Texas through Texas Center for Superconductivity at University of Houston. We acknowledge the Texas A&M Supercomputing Facility (http://sc.tamu.edu/) for providing computing resources in conducting the research reported in this paper.

PY - 2013/3/11

Y1 - 2013/3/11

N2 - We show that 30 keV Ar cluster ion bombardment of Ni52.5Nb 10Zr15Ti15Pt7.5 metallic glass (MG) can remove surface mountain-like features and reduce the root mean square surface roughness from 12 nm to 0.7 nm. X-ray diffraction analysis reveals no crystallization after cluster ion irradiation. Molecular dynamics simulations show that, although damage cascades lead to local melting, the subsequent quenching rate is a few orders of magnitude higher than the critical cooling rate for MG formation, thus the melted zone retains its amorphous nature down to room temperature. These findings can be applied to obtain ultra-smooth MGs without introducing crystallization.

AB - We show that 30 keV Ar cluster ion bombardment of Ni52.5Nb 10Zr15Ti15Pt7.5 metallic glass (MG) can remove surface mountain-like features and reduce the root mean square surface roughness from 12 nm to 0.7 nm. X-ray diffraction analysis reveals no crystallization after cluster ion irradiation. Molecular dynamics simulations show that, although damage cascades lead to local melting, the subsequent quenching rate is a few orders of magnitude higher than the critical cooling rate for MG formation, thus the melted zone retains its amorphous nature down to room temperature. These findings can be applied to obtain ultra-smooth MGs without introducing crystallization.

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Smoothing metallic glasses without introducing crystallization by gas cluster ion beam

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