TY - JOUR
T1 - Surmounting the thermal processing limits
T2 - Patterning TiZrCuPdSn bulk metallic glass even with nanocrystallization
AU - Cai, Fei-Fan
AU - Sarac, Baran
AU - Chen, Zhuo
AU - Czibula, Caterina Marina
AU - Spieckermann, Florian
AU - Eckert, Jürgen
N1 - Publisher Copyright: © 2022 The Authors
PY - 2022/11/4
Y1 - 2022/11/4
N2 - Ni-free Ti-based bulk metallic glasses (BMGs) are promising for biomedical applications, thanks to their excellent biocompatibility and high corrosion resistance. BMGs can be shaped and patterned by viscous flow deformation using thermoplastic net-shaping. This work presents a novel strategy for thermoplastic net-shaping of Ti40Zr10Cu34Pd14Sn2 BMG. Instead of operating for a short time slightly above the glass transition temperature to avoid crystallization, the proposed method accepts the formation of nanocrystals and makes use of the lower viscosity of the supercooled liquid when processing above the glass transition temperature. Following this approach, Ti40Zr10Cu34Pd14Sn2 BMG is deformed from a rod to a thin disk, and patterns scaling from 5 μm to 300 μm are successfully created on the Ti-BMG surfaces, demonstrating the potential to create complex features for functional materials. Furthermore, after the thermoplastic net-shaping treatment, the Vickers hardness increases by 6% while the corrosion and passivation current density decrease by an order of magnitude. This work reveals that the BMGs can still be deformed and patterned via the thermoplastic net-shaping technique if the first crystallization event of the BMG systems is the formation of nanocrystals. Most importantly, this work reveals the possibility of processing a broad family of mediocre glass-forming systems and semi-crystalline composites via thermoplastic net-shaping.
AB - Ni-free Ti-based bulk metallic glasses (BMGs) are promising for biomedical applications, thanks to their excellent biocompatibility and high corrosion resistance. BMGs can be shaped and patterned by viscous flow deformation using thermoplastic net-shaping. This work presents a novel strategy for thermoplastic net-shaping of Ti40Zr10Cu34Pd14Sn2 BMG. Instead of operating for a short time slightly above the glass transition temperature to avoid crystallization, the proposed method accepts the formation of nanocrystals and makes use of the lower viscosity of the supercooled liquid when processing above the glass transition temperature. Following this approach, Ti40Zr10Cu34Pd14Sn2 BMG is deformed from a rod to a thin disk, and patterns scaling from 5 μm to 300 μm are successfully created on the Ti-BMG surfaces, demonstrating the potential to create complex features for functional materials. Furthermore, after the thermoplastic net-shaping treatment, the Vickers hardness increases by 6% while the corrosion and passivation current density decrease by an order of magnitude. This work reveals that the BMGs can still be deformed and patterned via the thermoplastic net-shaping technique if the first crystallization event of the BMG systems is the formation of nanocrystals. Most importantly, this work reveals the possibility of processing a broad family of mediocre glass-forming systems and semi-crystalline composites via thermoplastic net-shaping.
KW - Biomaterials
KW - Bulk metallic glass
KW - Nanocrystals
KW - Patterning
KW - Thermoplastic net-shaping
KW - Titanium alloys
UR - http://www.scopus.com/inward/record.url?scp=85141297225&partnerID=8YFLogxK
U2 - 10.1016/j.mtadv.2022.100316
DO - 10.1016/j.mtadv.2022.100316
M3 - Article
AN - SCOPUS:85141297225
SN - 2590-0498
VL - 16.2022
JO - Materials today advances
JF - Materials today advances
IS - December
M1 - 100316
ER -