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Characterization of pyrocarbon coated materials using laboratory based x-ray phase contrast imaging technique
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10.1063/1.2772780
/content/aip/journal/rsi/78/8/10.1063/1.2772780
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/8/10.1063/1.2772780

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Photograph of the experimental setup.

Image of FIG. 2.
FIG. 2.

Plot of the dose delivered by the x-ray tube as a function of tube current. The dose increases linearly with increase in tube current.

Image of FIG. 3.
FIG. 3.

Plot showing the dose received by dosimeter at two different distances at fixed tube voltage and current.

Image of FIG. 4.
FIG. 4.

Plot showing the linearity of CCD detector with respect to increase in the (a) current and (b) integration time.

Image of FIG. 5.
FIG. 5.

(Color online) (a) Measured MTF of the CCD detector system. (b) The image was taken by keeping the resolution pattern in contact with CCD detector.

Image of FIG. 6.
FIG. 6.

(a) Measured NPS spectrum of the detector at the dose of . Gray values (intensity in arbitrary units) are scaled for display purpose. (b) Plot of DQE of the imaging system.

Image of FIG. 7.
FIG. 7.

(a) Image of zirconia microsphere coated with pyrocarbon at . (b) Image obtained with the polychromatic x-ray data. Color bar represents the intensity values in the images normalized to direct x rays without any object.

Image of FIG. 8.
FIG. 8.

(Color online) [(a)–(f)] Images of alumina microspheres obtained in phase contrast mode. Data collected at , , and varying source-to-object distance from (a) , (b) , (c) , (d) , (e) , and (f) .

Image of FIG. 9.
FIG. 9.

(a) Zirconia microspheres of diameter deposited with pyrocarbon (E3–E5). (b) Magnified image shows the nonuniformity in the coated thickness.

Image of FIG. 10.
FIG. 10.

(a) Zirconia microspheres of diameter deposited with pyrocarbon. The image shows that pyrocarbon deposition is uniform in this case (E12). The estimated coating thickness is .(b) Magnified image highlighting the coating.

Image of FIG. 11.
FIG. 11.

(a) Alumina coated with pyrocarbon. The estimated coating thickness is . (b) Magnified image highlighting the coating.

Tables

Generic image for table
Table I.

Experimental parameters for pyrocarbon coating on zirconia microspheres.

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/content/aip/journal/rsi/78/8/10.1063/1.2772780
2007-08-20
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Characterization of pyrocarbon coated materials using laboratory based x-ray phase contrast imaging technique
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/8/10.1063/1.2772780
10.1063/1.2772780
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