منابع مشابه
Data Intensive Imaging for 3D Atom Probe
Atom Probe Tomography (APT) combines atomic imaging with a time-of-flight mass spectrometer to provide direct space three-dimensional, atomic-scale resolution images of materials with the chemical identities of all the detected atoms. Quantitative analysis of APT data through advanced data mining methods enhances the chemical characterization of alloy systems and accounts for the statistical un...
متن کاملAtom-probe Analysis of Zircaloy
Zirconium based alloys in the Zircaloy series have been analysed with atom-probe field-ion microscopy. During specimen preparation an anodic layer is formed, containing about 50% oxygen. In preliminary analyses of the matrix al1 the minor elements Fe, Ni, Cr and O were detected, and it appears possible to determine with the atom-probe whether any particular heat treatment causes matrix depletio...
متن کاملStatistical Analysis of an Atom Probe Study of Iron Chromium
The atom probe was used to study the microstructure of samples of Fe-Cr (32 at%) aged for different periods. The data were expected to reveal evidence of spinodal decomposition, with the wavelength of the sinusoidal fluctuations increasing with aging time. This paper discusses a statistical model for the data. A twostage hierarchical model is used, in which the first stage models the spinodal d...
متن کاملAN ATOM-PROBE ANALYSIS OF Al-Li ALLOYS
The aging process in A1-Li alloys was studied by an atom-probe FIM. Two types of precipitates were recognized in the FIM image, one is brightly imaged with a high degree of order in its structure and the other appeared dark against the Al matrix. Atom-probe analysis showed that the Li concentration is in a range of 10 to 25 at% in the dark precipitate and approximately 25 at% in the bright prec...
متن کاملAN ATOM-PROBE STUDY OF Fe-Ti ALLOYS
The ToF atom-probe FIM was used to study surface segregation of Fe-Ti alloys. Ti segregates to the surface upon annealing at or above 650°C. The degree of segregation depends on the crystallographic orientation, 100% at the (110) and (111), 70% at the (100) and £50% at the (121) plane. It is found that the presence of H2(D2) during annealing enhances surface segregation of Ti and that oxygen de...
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ژورنال
عنوان ژورنال: Bulletin of Materials Science
سال: 1984
ISSN: 0250-4707,0973-7669
DOI: 10.1007/bf02744084