Zobrazeno 1 - 10
of 17
pro vyhledávání: '"R.P. Setna"'
A simple Monte Carlo model has been used to simulate diffusional phase transformations occurring in binary alloys during thermal ageing. The results of the simulation are compared directly with atomic-scale chemical information obtained from position
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::278633b18117cce68ede81de27891e93
https://doi.org/10.1098/rsta.1992.0104
https://doi.org/10.1098/rsta.1992.0104
Cu-1.0at%Co, Cu-2.0at%Co and Cu-2.6at%Co alloys, aged at 723 K for various times up to 120 h, have been examined using FIM-AP and PoSAP. The alloys were chosen such that the free-energy barrier to decomposition was small (less than ≈ 10kT). Three-d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28ee155324ad519acf0ea336d58d14c6
https://doi.org/10.1016/0169-4332(94)90344-1
https://doi.org/10.1016/0169-4332(94)90344-1
Publikováno v:
Scopus-Elsevier
The difficulties associated with the aperture geometry of the conventional atom probe have been overcome by the introduction of a new generation of wide-angle, single-atom sensitivity, positionsensitive detectors. With the aid of such detectors, it i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49307c76f1a4d2c97d20cf2e9b00e625
https://ora.ox.ac.uk/objects/uuid:2a0464ce-7907-4afe-b6cd-e3f7382020e5
https://ora.ox.ac.uk/objects/uuid:2a0464ce-7907-4afe-b6cd-e3f7382020e5
Publikováno v:
Applied Surface Science. :382-391
In this paper a method is outlined to calibrate both the lateral and depth scales using a combination of FIM and PoSAP microanalysis. Results are given for the following alloy systems: Fe-45at%Cr, Cu-1at%Co, Al-3at%Zn-3 at%Mg-1at%Cu and Fe-1.3wt%Cu-1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fe7a5ec9e43c933f4aace5872e107df
https://doi.org/10.1016/0169-4332(94)90371-9
https://doi.org/10.1016/0169-4332(94)90371-9
Publikováno v:
Applied Surface Science. 67:368-379
In this paper we present a position sensitive atom probe study of phase decomposition in a Cu–2.6at%Co alloy, aged at 723 K for various times up to 24 hours. The composition and ageing temperature of the alloy were chosen such that the free energy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ad77c563addc8ce2eb7914d799c2275
https://doi.org/10.1016/0169-4332(93)90340-h
https://doi.org/10.1016/0169-4332(93)90340-h
In the early stages of phase transformations, microstructures are generated with the dimensions of only a few atomic spacings. Investigation of structures on such a fine scale poses severe difficulties, not only for experimental studies, but also for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7a0ffaa2ec0d8bb7076274ee83044f4
https://doi.org/10.2172/195731
https://doi.org/10.2172/195731
Autor:
Chris R. M. Grovenor, J.E. Brown, R.A.D. Mackenzie, G.D.W. Smith, R.P. Setna, Barbara A. Shollock, P.J. Warren, Alfred Cerezo, I. Stark, James Alexander Liddle, Jonathan M. Hyde
Publikováno v:
ULTRAMICROSCOPY. 47(1-3)
This paper describes some recent results on the use of field-ion microscopy and atom-probe techniques in the study of the fine-scale chemistry of a range of different materials. It is shown that field-ion images of the early stages of precipitation i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c973613f4e2f601b4cac2c4d9142b573
http://ora.ox.ac.uk/objects/uuid:b501e790-84e9-4fb9-93ee-2066c6e3f6c5
http://ora.ox.ac.uk/objects/uuid:b501e790-84e9-4fb9-93ee-2066c6e3f6c5
Autor:
P.J. Warren, R.P. Setna, Alfred Cerezo, George Davey Smith, G. Beverini, Jonathan M. Hyde, Michael K Miller
Publikováno v:
SURFACE SCIENCE 38TH INTERNATIONAL FIELD EMISSION SYMP : FIELD EMISSION 91. 266(1-3)
A new class of atom-probe instruments has recently been developed which combine single atom sensitivity mass spectrometry with position sensing, and have the potential of reconstructing nanometre-scale composition variations in three-dimensions. Thes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85318ff8eb3fc632dcf9e9df91d7de35
http://ora.ox.ac.uk/objects/uuid:1d76d95e-366f-4531-9f28-82a930fcdc1e
http://ora.ox.ac.uk/objects/uuid:1d76d95e-366f-4531-9f28-82a930fcdc1e
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 50:1478-1479
The combination of a field ion microscope with a time-of-flight mass spectrometer provides the capability for chemical microanalysis at the single atom level. Such an instrument is termed an Atom Probe. Conventionally, the connection between the micr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba2278c529a8eba2931a0b1299bcfc1a
https://doi.org/10.1017/s0424820100132029
https://doi.org/10.1017/s0424820100132029
Publikováno v:
JOURNAL OF PHYSICS-CONDENSED MATTER. 1
Vanadium specimens have been prepared and imaged for the first time in the field ion microscope. The composition of oxide films formed on vanadium at temperatures between 290 and 473 K has been determined by atom probe microanalysis. It is shown that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ac841d4b3499d68f23743b8617f33e6
http://ora.ox.ac.uk/objects/uuid:01bcab9e-dd40-40bb-93df-97a7a1e983ef
http://ora.ox.ac.uk/objects/uuid:01bcab9e-dd40-40bb-93df-97a7a1e983ef