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CITYFLUX – Filter Sample (J Floor)
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Colour guide for EDX data:
Aluminium Silicon Phosphorous Barium Zinc Sodium Sulphur Nitrogen Carbon Potassium Chlorine Oxygen Magnesium Iron Calcium
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A B C D
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A Foam damage
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a b c 10um
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b a b c C Ca Si Fe c a Si Si K Ca Ca Al S S Al
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After Before
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Foam damage
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A B C D
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B
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Foam damage in progress – 3 images taken over 20 seconds
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a b c 10um
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c a Cl S Ca a b c Sample moved .: Background spectrum? b Ca S K Si Cl
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Images after Foam damage
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A B C D
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a b c d C
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d a C Si Ca Mg S Al C Si K Ca O Cl a b c d b c Ca C Al Si Mg C K O S Cl
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Images after
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A B C D
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D 1 2 3
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a b c 1
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Foam damage – images taken over 15 seconds
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a a b c Fe Si b c C C S Cl Ca
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Before Image before/after After
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D 1 2 3
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a b c d e 2 2
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d a S C Ca C Si Mg Ca Al Cl O S Fe a b c d e C e Ca c b C C O
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Before Particle flipped over After Damage by beam
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D 1 2 3
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a b c d f e 3
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b Si a C Al Si C Ca Cl Cl K Ca Al S a b c d f e S O K Fe c f C C Si Cl Al Ca K S Fe Mg e C d Ca Ca C Si O O
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After image
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Overview after investigation,
Extensive beam damage
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Particle sizes: All less than ~10um, most <2um
Particle Composition – Carbon or silicate material
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