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- Title
Structural, mechanical, and magnetic properties of ferrite-austenite mixture in evaporated 304 stainless steel thin films.
- Authors
Merakeb, Noureddine; Messai, Amel; Djelloul, Abdelkader; Ayesh, Ahmad
- Abstract
In this paper, we investigate the structure, composition, magnetic, and mechanical properties of stainless steel thin films formed by thermal evaporation technique. These thin films reveal novel structural and physical properties where they were found to consist of nanocrystals that are ~90 % body-centred cubic crystal structure which holds ferromagnetic properties (α-phase), and ~10 % face-centred cubic crystal structure which is paramagnetic at room temperature (γ-phase). The presence of the above phases was quantified by X-ray diffraction, transmission electron microscopy, and conversion electron Mössbauer spectroscopy. The magnetic properties were evaluated by a superconducting quantum interference device magnetometer, and they confirmed the dual-phase crystal structure of the stainless thin films, where the presence of γ-phase reduced the magnetization of the produced thin films. In addition, the fabricated stainless steel thin films did not contain micro-cracks, and they exhibit a tensile stress of about 1.7 GPa, hardness of 7.5 GPa, and elastic modulus of 104 GPa.
- Subjects
MAGNETIC properties of metallic films; MECHANICAL properties of metals; CRYSTAL structure; AUSTENITE; STAINLESS steel; THIN films; EVAPORATION (Chemistry)
- Publication
Applied Physics A: Materials Science & Processing, 2015, Vol 121, Issue 2, p739
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-015-9472-x