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Low‑temperature glow discharge plasma oxidation of the Zr48Cu36Al8Ag8 bulk metallic glass

Kulikowski K., Błyskun P., Kulik T.

Archives of Civil and Mechanical Engineering

2024

Vol. 24, no. 2

art. no. e65, 2024

Among many bulk metallic glasses, the Zr-based ones are distinguished by their unique combination of high glass forming ability with good mechanical properties. The aim of this work was to investigate the possibility of the Zr48Cu36Al8Ag8 bulk metallic glass oxidation in low-temperature plasma to improve its micromechanical properties without the substrate crystallization. The influence of the ions accelerating voltage (600-1000 V) and the process time (30-120 min) on the surface structure and its mechanical properties were determined. After the process, the X-ray diffraction phase analysis, microscopic observations, micro- and nano-hardness as well as tribological tests were performed. It has been revealed that it is indeed possible to plasma treat a Zr-based BMG without substrate crystallization and obtain an oxide layer which improves surface properties. Moreover, the results provided in the manuscript show that it is possible to prepare a single or double layer of oxides depending on the process parameters. Optimizing the parameters is necessary to obtain the desired microstructure and properties.