Chemical Analysis Ppt — Sem

Analyzing grain boundaries and alloy compositions. Forensics: Identifying gunshot residue or paint chips. Semiconductors: Checking for contaminants in microchips. Geology: Identifying mineral phases in rock thin sections. Summary for Slide Deck Construction Title Slide: SEM Chemical Analysis & Microanalysis. Introduction: Brief overview of SEM vs. Optical microscopy. The Physics: X-ray generation and Bohr’s atomic model.

This creates a color-coded image where each color represents a different element. It is the most visually striking part of a , as it shows exactly where elements are distributed across the topography. 4. Factors Affecting Accuracy sem chemical analysis ppt

| Slide | Visual Type | Content | |-------|-------------|---------| | 3 | Monte Carlo plot | Interaction volume for 5 keV vs. 20 keV in Si | | 4 | Detector cross-section | SDD schematic with FET and collimator | | 5 | Equation & graph | ZAF factors vs. atomic number | | 6 | Crystal diagram | Bragg diffraction geometry | | 7 | Overlaid spectra | EDS vs. WDS of a complex alloy | | 8 | Kikuchi pattern | Indexed pattern from an olivine crystal | | 10 | False-color map | PCA component 1 vs. component 2 | | 12 | Micrograph | Carbon contamination spots after 10 min | Analyzing grain boundaries and alloy compositions

EDS is generally effective for elements from Boron (B) to Uranium (U), with a sensitivity of roughly 0.1 weight percent. 5. Industrial Applications Geology: Identifying mineral phases in rock thin sections