Cavitation erosion resistance of NiTi thin films produced by Filtered Arc Deposition

• Published in: Wear Vol. 267; no. 1; pp. 233 - 243
• Main Authors: Yang, L.M., Tieu, A.K., Dunne, D.P., Huang, S.W., Li, H.J., Wexler, D., Jiang, Z.Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15.06.2009; Elsevier
• Subjects: Applied sciences; Cavitation erosion; Exact sciences and technology; Filtered Arc Deposition System; Friction, wear, lubrication; Machine components; Mechanical engineering. Machine design; NiTi thin films; Pseudoelasticity; Substrate temperature; Filtered Arc Deposition System; Pseudoelasticity; NiTi thin films; Cavitation erosion; Substrate temperature; Austenitic stainless steel; Temperature effect; Acoustic cavitation; Thin film; Wear resistance; ASTM standard; Erosion; Differential scanning calorimetry; Scanning electron microscopy; Electric arc; Arc spraying; Experimental study; Dispersive spectrometry; X ray diffraction; Crystalline material; Stainless steel-316; Transmission electron microscopy; Filter; Property structure relationship; Tribology
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/j.wear.2009.01.035

In this study, NiTi thin films were obtained by using a Filtered Arc Deposition System (FADS). X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Transmission Electron Microscopy (TEM) and Differential Scanning Calorimetry (DSC) were used to investigate the effect of substrate temperature (130–600 °C) on the structures and properties of NiTi thin films. It was found that FADS produced dense and homogenous films. Higher substrate temperatures resulted in crystalline thin films dominated by the parent phase (B2). The cavitation erosion resistance of the films was assessed by using ASTM Test Method G32. It was found that NiTi thin films showed superior cavitation erosion resistance compared with 316 austenitic stainless steel. The improved cavitation erosion resistance was attributed to the recoverable deformation associated with pseudoelasticity of the NiTi thin film.