Comparative Study of Structural and Mechanical Properties of as Deposited and Shock Wave Exposed NiW Nano Structured Thin Films

Defence science journal

article

G Nivetha¹  R. Kannan²  M Selvambikai¹  C Vasantharaj³  B Praveen Kumar⁴  P. S Prem Kumar⁵  K Sundararaj⁶ 

[1] Kumaraguru College of Technology;Department of Physics, Kumaraguru College of Technology;Kumaraguru Centre for Industrial Research and Innovation - KC.IRI Trustee &Treasurer, Society for Smart E-Mobility - SSEM Former Scientist & Project Director, DRDO Kumaraguru College of Technology Chinnavedampatti;Armament Research and Development Establishment: Pune;Associate Professor at Kumaraguru College of Technology Aeronautical Engineering Chinnavedampatti;Department of Aeronautical Engineering Kumaraguru College of Technology Chinnavedampatti Coimbatore 641 049 Tamil Nadu India

关键词: Surface treatment;    NiW;    Electrodeposition;    Corrosion rate;    Shock tube and Mach Number.;   

DOI  :  10.14429/dsj.72.17658

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

The current work describes the effect of shock wave exposure on electroplated NiW thin films. NiW thin films were deposited through electrodeposition process by varying the bath temperatures (35°C and 70°C) at constant current density of 1A/dm2. The deposited NiW thin films were exposed to shock waves with varying Mach numbers of 1.13 and 2.33 using an in-house shock wave tube facility. The as-deposited and shock wave-exposed NiW thin films were characterized by XRD, FESEM, EDS, and EIS to reveal its structural and mechanical properties. The XRD results disclose the stable cubic structural phase of as deposited and shock wave exposed NiW thin films with average crystallite size varying between 5 nm to 17nm. The elemental composition of as-deposited and shock-wave exposed films are similar as confirmed in the EDS analysis. This henceforth represents the stability of nanostructured NiW film in terms of compositional and structural aspect. Morphological analysis through FESEM shows that the exposed thin film is defect free due to the impact of shock waves. Furthermore, corrosion resistance is observed to enhance ten times in shock-wave exposed thin film than as-deposited thin film for higher mach number (Pressure ~63 bar). Similarly, corrosion resistance for low mach number (pressure ~13 bar) increases by three times of as deposited film according to the EIS analysis. Therefore, the structural, morphological and corrosion properties were enhanced upon surface treatment by shock wave exposure. NiW thin films with enhanced mechanical properties such as low corrosion rate, high corrosion resistance is used in various industrial applications like defense applications, aircraft, and marine applications.

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