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Quantitative atom p...
Quantitative atom probe analysis of carbides
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- Thuvander, Mattias, 1968 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Weidow, Jonathan, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Angseryd, Jenny, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Falk, Lena, 1956 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Liu, Fang, 1975 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Sonestedt, Marie, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Stiller, Krystyna Marta, 1947 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andrén, Hans-Olof, 1947 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2011
- 2011
- English.
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In: Ultramicroscopy. - : Elsevier BV. - 1879-2723 .- 0304-3991. ; 111:6, s. 604-608
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Abstract
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- Compared to atom probe analysis of metallic materials, the analysis of carbide phases results in an enhanced formation of molecular ions and multiple events. In addition, many multiple events appear to consist of two or more ions originating from adjacent sites in the material. Due to limitations of the ion detectors measurements generally underestimate the carbon concentration. Analyses using laser-pulsed atom probe tomography have been performed on SiC, WC, Ti(C,N) and Ti 2 AlC grains in different materials as well as on large M 2 3C 6 precipitates in steel. Using standard evaluation methods, the obtained carbon concentration was 6-24% lower than expected from the known stoichiometry. The results improved remarkably by using only the 13 C isotope, and calculating the concentration of 12 C from the natural isotope abundance. This confirms that the main reason for obtaining a too low carbon concentration is the dead time of the detector, mainly affecting carbon since it is more frequently evaporated as multiple ions. In the case of Ti(C,N) andTi 2 AlC an additional difficulty arises from the overlap between C 2 + ,C 2+ 4 and Ti 2+ at the mass-to-charge 24 Da. © 2010 Elsevier B.V.
Subject headings
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
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- art (subject category)
- ref (subject category)
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Thuvander, Matti ...
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Weidow, Jonathan ...
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Angseryd, Jenny, ...
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Falk, Lena, 1956
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Liu, Fang, 1975
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Sonestedt, Marie ...
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show more...
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Stiller, Krystyn ...
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Andrén, Hans-Olo ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Analytical Chemi ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Other Materials ...
- Articles in the publication
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Ultramicroscopy
- By the university
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Chalmers University of Technology