Combinatorial Synthesis and High-Throughput Characterization of Microstructure and Phase Transformation in Ni–Ti–Cu–V Quaternary Thin-Film Library
Autor: | Alfred Ludwig, Huilong Hou, Suchismita Sarkar, Apurva Mehta, Sigurd Thienhaus, Naila Al Hasan, Ichiro Takeuchi |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Environmental Engineering
Materials science General Computer Science Materials Science (miscellaneous) General Chemical Engineering Energy Engineering and Power Technology Ni–Ti–Cu–V alloys Thin-film library 02 engineering and technology 010402 general chemistry 01 natural sciences Wavelength-dispersive X-ray spectroscopy Operating temperature Wafer Quaternary alloys Thin film Combinatorial materials science General Engineering Shape-memory alloy 021001 nanoscience & nanotechnology Microstructure 0104 chemical sciences Chemical engineering Shape memory alloys lcsh:TA1-2040 Diffusionless transformation Elastocaloric cooling 0210 nano-technology Ternary operation lcsh:Engineering (General). Civil engineering (General) |
Zdroj: | Engineering, Vol 6, Iss 6, Pp 637-643 (2020) |
ISSN: | 2095-8099 |
Popis: | Ni–Ti–based shape memory alloys (SMAs) have found widespread use in the last 70 years, but improving their functional stability remains a key quest for more robust and advanced applications. Named for their ability to retain their processed shape as a result of a reversible martensitic transformation, SMAs are highly sensitive to compositional variations. Alloying with ternary and quaternary elements to fine-tune the lattice parameters and the thermal hysteresis of an SMA, therefore, becomes a challenge in materials exploration. Combinatorial materials science allows streamlining of the synthesis process and data management from multiple characterization techniques. In this study, a composition spread of Ni–Ti–Cu–V thin-film library was synthesized by magnetron co-sputtering on a thermally oxidized Si wafer. Composition-dependent phase transformation temperature and microstructure were investigated and determined using high-throughput wavelength dispersive spectroscopy, synchrotron X-ray diffraction, and temperature-dependent resistance measurements. Of the 177 compositions in the materials library, 32 were observed to have shape memory effect, of which five had zero or near-zero thermal hysteresis. These compositions provide flexibility in the operating temperature regimes that they can be used in. A phase map for the quaternary system and correlations of functional properties are discussed with respect to the local microstructure and composition of the thin-film library. |
Databáze: | OpenAIRE |
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