Buckling of metallic glass supercooled liquid layer during embossing

Chandra Sekhar Meduri, Zhonglue Hu, Jerzy Blawzdziewicz, Golden Kumar

Research output: Contribution to journalArticle

Abstract

Embossing of metallic glass supercooled liquids into templates is emerging as a precision net-shaping and surface patterning technique for metals. Here, we report the effect of thickness of metallic glass on template-based embossing. The results show that the existing embossing theory developed for thick samples fails to describe the process when the thickness of metallic glass becomes comparable to the template cavity diameter. The increased flow resistance at the cavity entrance results in viscous buckling of supercooled liquid instead of filling. A phenomenological equation is proposed to describe the thickness dependent filling of template cavities. The buckling phenomenon is analyzed based on the folding model of multilayer viscous media. We show that controlled buckling can be harnessed in the fabrication of metal microtubes, which are desirable for many emerging applications.

Original languageEnglish
Article number113102
JournalApplied Physics Letters
Volume114
Issue number11
DOIs
StatePublished - Mar 18 2019

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