Characterization Techniques-Physics-Report, Study Guides, Projects, Research of Physics

Download Characterization Techniques-Physics-Report and more Study Guides, Projects, Research Physics in PDF only on Docsity! 1. Characterization Techniques: We can be characterized CVD coating by different techniques, but we will use followings: 1. Adhesion Test 2. X-ray Diffraction (XRD) 3. Scanning Electron Microscopy (SEM) 1.1. Adhesion Test: We will use Elcometer 107 Cross Hatch Cutter to characterize the adhesion of nickel film on aluminum and copper substrate. The Elcometer Cross Hatch Cutter is a simple but effective instrument for assessing the adhesion or resistance to separation of coatings from substrates. The instrument is ideal for smooth coatings on flat surfaces. The cutter scores through the coating down to the substrate. Two cuts are made at right angles to each other resulting in a grid of small squares. Adhesion is then assessed visually by comparing the grid of squares against Standards. A range of cutting blades is available for different thicknesses and types of coating. Figure 1: Elcometer 107 Cross Hatch Cutter docsity.com Test Procedure: Following steps are performed for adhesion testing according to ASTM standard (D3359B). Step No.1: Place the cutting tool on the sample, press down gently and pull the tool towards you in one steady movement to make a series of parallel cuts approximately 10 mm long. Apply sufficient pressure to ensure that you cut through the coating to the substrate. Step No.2: Place the cutting tool on the sample at 90° to the first cut and repeat step (1) to create a lattice pattern on the coating. Step No.3: Brush lightly to remove detached flakes or ribbons of coating and inspect to ensure the cuts have penetrated all the way through the coating. Step No.4: docsity.com Results: Following results are obtained after adhesion testing of Aluminum and copper substrates. Ni coating on Copper Substrate: Figure 2: After Adhesion Test (a) CVD nickel coated electro-polished Copper substrate (b) ASTM Tape Figure 3: After Adhesion Test (a) CVD nickel coated pickled Copper substrate (b) ASTM Tape docsity.com Figure 4: After Adhesion Test (a) CVD nickel coated electro-polished and pickled Copper substrate (b) ASTM Tape Ni coating on Aluminum Substrate: docsity.com