Virtual Labs

Quantitative X-ray Metallography using Electron Probe Micro Analyzer

What is the primary purpose of using an electron microprobe analyzer in quantitative X-ray metallography?

a: To measure the hardness of ceramic materials Explanation

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b: To determine the crystallographic structure of metals Explanation

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c: To analyze the compositional distribution of elements. Explanation

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d: To observe the optical properties of materials Explanation

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Which of the following is the most important factor in achieving accurate quantitative compositional analysis using an electron microprobe analyzer?

a: High magnification of the electron beam Explanation

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b: Calibration of the X-ray detectors Explanation

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c: Use of 10eV electron beams Explanation

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d: Brightness of the electron source Explanation

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Which of the following is a limitation of EPMA when analyzing ceramics?

a: Inability to detect elements with high atomic numbers Explanation

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b: Difficulty in distinguishing between overlapping X-ray peaks from similar elements Explanation

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c: Limited to analyzing only metallic samples Explanation

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d: Requires samples to be in powder form Explanation

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Why is it crucial to use standards when performing quantitative compositional measurements of ceramics with an electron microprobe analyser?

a: To compare the crystal structure of different samples Explanation

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b: To ensure the X-ray intensity is high Explanation

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c: To accurately determine the concentration of elements by comparing them with known compositions Explanation

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d: To measure the mechanical properties of the material Explanation

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What is the typical size of the electron beam spot used in an electron microprobe analyzer for compositional analysis?

a: 100 micrometers Explanation

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b: 1 millimeter Explanation

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c: 1 nanometer Explanation

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d: 1 micrometer Explanation

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