Fabrication of amorphous Zr48Cu36Al8Ag8 thin films by ion beam sputtering and their corrosion behavior in SBF for bio implants

• Published in: Journal of alloys and compounds Vol. 572; pp. 163 - 169
• Main Authors: Subramanian, B., Yugeswaran, S., Kobayashi, Akira, Jayachandran, M.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 25.09.2013; Elsevier
• Subjects: Alloys; Amorphous materials; Austenitic stainless steels; Condensed matter: structure, mechanical and thermal properties; Corrosion; Cross-disciplinary physics: materials science; rheology; Crystal structure; Deposition by sputtering; Exact sciences and technology; Heat resistant steels; Ion beam sputtering; Materials science; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Metallic glasses; Methods of deposition of films and coatings; film growth and epitaxy; Physics; Pitting (corrosion); Solid surfaces and solid-solid interfaces; Surface structure and topography; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin films; Tribology and hardness; Vapor deposition; Vapor phase epitaxy; growth from vapor phase; X-ray diffraction corrosion; Thin films; Metallic glasses; Vapor deposition; X-ray diffraction corrosion; Amorphous thin film; Electron diffraction; XRD; Coatings; Surface states; Sputtering; Surface structure; Metallic thin films; Hardness testing; Nanohardness; Ion beam sputtering; Nanoindentation; Mechanical properties; Hardness; AES; Young modulus; Corrosion resistance; Body fluids; Transmission electron microscopy; Electron microprobe analysis; Corrosion; Growth mechanism; Hardness indentation; Sputter deposition; Smooth surface; Stainless steel-316L
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.03.099

[Display omitted] •The deposited alloys were shown to have amorphous structure.•Coated specimen had higher corrosion resistance in SBF.•Coatings were non-cytotoxic in nature. The growth of multi component amorphous Zr48Cu36Al8Ag8 thin film metallic glasses (TFMGs) using single target ion beam sputtering has been systematically investigated. The as prepared sputtering target was crystalline in nature. The presence of the constituent elements was identified from EPMA and AES analysis. An atomically disordered structure was observed by micro X-ray diffraction, electron diffraction and high resolution transmission electron microscopy. Glassy films with atomically smooth surfaces of the order of 0.4nm with higher nanohardness of 9.33GPa and Young’s modulus of 117GPa compared to their crystalline substrate was observed from nanoindentation analysis. The study of in vitro corrosion of these coatings on implantable 316L stainless steel substrate in simulated body fluid (SBF) indicated that the as sputtered specimen had higher corrosion resistance without any localized pitting.