Bulk Metallic Glass with Benchmark Thermoplastic Processability


  • The authors acknowledge the valuable discussions with Prof. Jan Schroers and Dr. Marios D. Demetriou, and the kind help from Bo Li, Dr. Boonrat Lohwangwatana, Joseph P. Schramm, and Jin-yoo Suh on taking digital and optical graphs and doing fracture toughness measurements. We also thank the support from the MRSEC Program (Center for the Science and Engineering Materials, CSEM) of the National Science Foundation under Award Number DMR-0520565.


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Simple microreplication experiments carried out in open air using relatively low applied pressures demonstrate superior thermoplastic processability of newly designed bulk metallic glass. It is the microformed impression of a United States dime coin (see figure) made on the surface of metallic glass wafers at ∼370 °C. This bulk metallic glass exhibits benchmark characteristics of thermoplastic processing and will hopefully broaden the engineering applications of amorphous metals.