Relevant bibliographies by topics / Atom probe tomograpghy

Academic literature on the topic 'Atom probe tomograpghy'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Atom probe tomograpghy.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Atom probe tomograpghy"

1

Miller, M. K. "Atom Probe Tomography: A Tutorial." Microscopy and Microanalysis 6, S2 (August 2000): 1188–89. http://dx.doi.org/10.1017/s1431927600038435.

Full text
Abstract:
Atom probe tomography (APT) is an ultrahigh resolution microanalytical technique that enables the spatial coordinates and elemental identities of the atoms in a small volume of material to be determined. The specimen volume that may be analyzed is typically ∼ 10 to 20 nm square by ∼ 100 to 250 nm deep, and contains up to ∼ 1 million atoms. The distribution of the solute atoms within this volume may then be reconstructed from these data. The compositions of small volumes are determined by simply counting the number of atoms of each type within that volume, and thus the technique provides a fundamental measure of local concentrations. Atom probe tomography requires that the specimen has some electrical conductivity and may be applied to almost all metals and alloys, many semiconductors, and some electrically conducting ceramics. The sharp needle-shaped specimens may be fabricated from bulk and thin film materials with the use of electropolishing, chemical or ion milling methods.
APA, Harvard, Vancouver, ISO, and other styles
2

Chiaramonti, Ann N., Luis Miaja-Avila, Paul T. Blanchard, David R. Diercks, Brian P. Gorman, and Norman A. Sanford. "A Three-Dimensional Atom Probe Microscope Incorporating a Wavelength-Tuneable Femtosecond-Pulsed Coherent Extreme Ultraviolet Light Source." MRS Advances 4, no. 44-45 (2019): 2367–75. http://dx.doi.org/10.1557/adv.2019.296.

Full text
Abstract:
ABSTRACTPulsed coherent extreme ultraviolet (EUV) radiation is a potential alternative to pulsed near-ultraviolet (NUV) wavelengths for atom probe tomography. EUV radiation has the benefit of high absorption within the first few nm of the sample surface for elements across the entire periodic table. In addition, EUV radiation may also offer athermal field ion emission pathways through direct photoionization or core-hole Auger decay processes, which are not possible with the (much lower) photon energies used in conventional NUV laser-pulsed atom probe. We report preliminary results from what we believe to be the world’s first EUV radiation-pulsed atom probe microscope. The instrument consists of a femtosecond-pulsed, coherent EUV radiation source interfaced to a local electrode atom probe tomograph by means of a vacuum manifold beamline. EUV photon-assisted field ion emission (of substrate atoms) has been demonstrated on various insulating, semiconducting, and metallic specimens. Select examples are shown.
APA, Harvard, Vancouver, ISO, and other styles
3

Takahashi, Jun, Kazuto Kawakami, and Yukiko Kobayashi. "Study on Quantitative Analysis of Carbon and Nitrogen in Stoichiometric θ-Fe3C and γ′-Fe4N by Atom Probe Tomography." Microscopy and Microanalysis 26, no. 2 (March 5, 2020): 185–93. http://dx.doi.org/10.1017/s1431927620000045.

Full text
Abstract:
AbstractThe quantitative analysis performance of carbon and nitrogen was investigated using stoichiometric θ-Fe3C (25 at% C) and γ′-Fe4N (~20 at% N) precipitates in pulsed voltage and pulsed laser atom probes. The dependencies of specimen temperature, pulse fraction, and laser pulse energy on the apparent concentrations of carbon and nitrogen were measured. Good coincidence with 25 at% carbon concentration in θ-Fe3C was obtained for the pulsed voltage atom probe by considering the mean number of carbon atoms per ion at 24 Da and the detection loss of iron, while better coincidence was obtained for the pulsed laser atom probe by considering only the mean number of carbon at 24 Da. On the other hand, a lack of nitrogen concentration in γ′-Fe4N was observed for the two atom probes. In particular, the pulsed laser atom probe showed a significant lack of nitrogen concentration. This implies that a large amount of 14N2+ was obscured by the main iron peak of 56Fe2+ at 28 Da in the mass-to-charge spectrum. Regarding preferential evaporation or retention, carbon in θ-Fe3C exhibited little of either, but nitrogen in γ′-Fe4N exhibited definite preferential retention. This result can be explained by the large difference in ionization energy between carbon and nitrogen.
APA, Harvard, Vancouver, ISO, and other styles
4

Miller, M. K. "Atom Probe Tomography Of Interfaces." Microscopy and Microanalysis 5, S2 (August 1999): 118–19. http://dx.doi.org/10.1017/s143192760001391x.

Full text
Abstract:
The technique of atom probe tomography (APT) enables the x, y, and z coordinates and the elemental identities of the atoms in a small volume to be determined at the atomic level. Therefore, the APT technique may be used to characterize solute segregation to interfaces and precipitation in terms of concentration gradients and precipitate morphology. This type of information may be used to optimize the design of alloys.The material that was used to illustrate the capabilities of atom probe tomography is a complex polycrystalline nickel-based superalloy, Alloy 718. The composition of this commercial superalloy is Ni- 3.2 at. % Nb, 0.96% Al, 1.15% Ti, 20.3% Fe, 21.8% Cr, 0.26% Co, 1.8% Mo, 0.16% Mn, 0.21% Si and 0.26% C. The material was characterized after a heat treatment oM h at 1038°C + 8 h at 870°C + 500 h at 600°C. Previous atom probe field ion microscopy characterizations of this material has demonstrated that there is no intragranular precipitation after the anneal at 1038°C.
APA, Harvard, Vancouver, ISO, and other styles
5

Felfer, P., L. T. Stephenson, and T. Li. "Atom Probe Tomography." Practical Metallography 55, no. 8 (August 16, 2018): 515–26. http://dx.doi.org/10.3139/147.110543.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Kelly, Thomas F., and Michael K. Miller. "Atom probe tomography." Review of Scientific Instruments 78, no. 3 (March 2007): 031101. http://dx.doi.org/10.1063/1.2709758.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Miller, M. K., and R. G. Forbes. "Atom probe tomography." Materials Characterization 60, no. 6 (June 2009): 461–69. http://dx.doi.org/10.1016/j.matchar.2009.02.007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Kim, Se-Ho, Ji Yeong Lee, Jae-Pyoung Ahn, and Pyuck-Pa Choi. "Fabrication of Atom Probe Tomography Specimens from Nanoparticles Using a Fusible Bi–In–Sn Alloy as an Embedding Medium." Microscopy and Microanalysis 25, no. 2 (February 4, 2019): 438–46. http://dx.doi.org/10.1017/s1431927618015556.

Full text
Abstract:
AbstractWe propose a new method for preparing atom probe tomography specimens from nanoparticles using a fusible bismuth–indium–tin alloy as an embedding medium. Iron nanoparticles synthesized by the sodium borohydride reduction method were chosen as a model system. The as-synthesized iron nanoparticles were embedded within the fusible alloy using focused ion beam milling and ion-milled to needle-shaped atom probe specimens under cryogenic conditions. An atom probe analysis revealed boron atoms in a detected iron nanoparticle, indicating that boron from the sodium borohydride reductant was incorporated into the nanoparticle during its synthesis.
APA, Harvard, Vancouver, ISO, and other styles
9

Kelly, Thomas F., and David J. Larson. "Atom Probe Tomography 2012." Annual Review of Materials Research 42, no. 1 (August 4, 2012): 1–31. http://dx.doi.org/10.1146/annurev-matsci-070511-155007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Cerezo, Alfred, Peter H. Clifton, Mark J. Galtrey, Colin J. Humphreys, Thomas F. Kelly, David J. Larson, Sergio Lozano-Perez, et al. "Atom probe tomography today." Materials Today 10, no. 12 (December 2007): 36–42. http://dx.doi.org/10.1016/s1369-7021(07)70306-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Atom probe tomograpghy"

1

Marceau, Ross Kevin William. "Design in Light Alloys by Understanding the Solute Clustering Processes During the Early Stages of Age Hardening in Al-Cu-Mg Alloys." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/4008.

Full text
Abstract:
The evolution of atomistic-level nanostructure during the early stages of both standard, high-temperature T6 heat treatment, and low-temperature secondary ageing after interruption of the former (T6I4), has been investigated in rapid hardening Al-Cu-Mg alloys using a variety of microscopy and microanalytical techniques, including transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS) and atom probe tomography (APT). In order to carry out this objective, quantitative data-analysis methods were developed with respect to new cluster-finding algorithms, specifically designed for use with three-dimensional APT data. Prior to this detailed characterisation work, the actual thermal impact from both heat treatment and quenching of small, lab-scale specimens was determined through correlation of both experimental results and calculations that modelled the heat transfer conditions using the lumped capacitance method. Subsequently, the maximum diffusion distance by random walk of the solute atoms was calculated for these periods, bearing significance on the propensity for these atoms to have the ability to cluster together, rather than segregate to the dislocation loops in the microstructure, which have a relatively larger interspacing distance. Age-hardening curves for the Al-1.1Cu-xMg (x = 0, 0.2, 0.5, 0.75, 1.0, 1.7 at.%) alloys at 150ºC show that the rapid hardening phenomenon (RHP) exists for Mg compositions ≥ 0.5Mg. Given that zone-like precipitate structures were unable to be detected by TEM or APT during the early stages of ageing at 150ºC, and that statistically significant dispersions of clusters were found in the APT data after ageing for 60 s, the RHP is attributed to these clustering reactions. Identification of clusters in the APT data has been achieved using the core-linkage algorithm and they have been found to be quite small, containing only a few atoms up to a couple of tens of atoms. The RHP is governed by some critical number density of both Mg clusters and Cu-Mg co-clusters of a critical size, whereas Cu clusters do not contribute significantly to the hardening mechanism. Significance testing indicates that Mg clusters are more significant at smaller clusters sizes and Cu-Mg co-clusters more important at larger cluster sizes. Hardness results also confirm the existence of rapid early hardening during secondary ageing at 65ºC in Al-1.1Cu-1.7Mg. The mechanism of secondary rapid hardening involves a combination of both secondary clustering from solute (mainly Mg atoms) residual in solution, and pre-existing amorphous primary clusters that have slower growth kinetics at the lower secondary ageing temperature. The latter occurs mainly by vacancy-assisted diffusion of Mg atoms as evidenced by the gradual increase of the Mg:Cu ratio of co-clusters. From an alloy design point of view it is important to fully understand the solute distribution in the microstructure to be able to subsequently optimise the configuration for enhanced material properties. The change in dispersion of solute atoms during ageing was determined by combining calculations of % vacancy-solute associations with detailed measurements of the dislocation loops to estimate the solute distribution within the microstructure. The implication of the balance of solute atoms segregated to the loops compared with that in the matrix is then discussed in the context of hardnening mechanisms.
APA, Harvard, Vancouver, ISO, and other styles
2

Marceau, Ross Kevin William. "Design in Light Alloys by Understanding the Solute Clustering Processes During the Early Stages of Age Hardening in Al-Cu-Mg Alloys." University of Sydney, 2008. http://hdl.handle.net/2123/4008.

Full text
Abstract:
Doctor of Philosophy (PhD)
The evolution of atomistic-level nanostructure during the early stages of both standard, high-temperature T6 heat treatment, and low-temperature secondary ageing after interruption of the former (T6I4), has been investigated in rapid hardening Al-Cu-Mg alloys using a variety of microscopy and microanalytical techniques, including transmission electron microscopy (TEM), positron annihilation spectroscopy (PAS) and atom probe tomography (APT). In order to carry out this objective, quantitative data-analysis methods were developed with respect to new cluster-finding algorithms, specifically designed for use with three-dimensional APT data. Prior to this detailed characterisation work, the actual thermal impact from both heat treatment and quenching of small, lab-scale specimens was determined through correlation of both experimental results and calculations that modelled the heat transfer conditions using the lumped capacitance method. Subsequently, the maximum diffusion distance by random walk of the solute atoms was calculated for these periods, bearing significance on the propensity for these atoms to have the ability to cluster together, rather than segregate to the dislocation loops in the microstructure, which have a relatively larger interspacing distance. Age-hardening curves for the Al-1.1Cu-xMg (x = 0, 0.2, 0.5, 0.75, 1.0, 1.7 at.%) alloys at 150ºC show that the rapid hardening phenomenon (RHP) exists for Mg compositions ≥ 0.5Mg. Given that zone-like precipitate structures were unable to be detected by TEM or APT during the early stages of ageing at 150ºC, and that statistically significant dispersions of clusters were found in the APT data after ageing for 60 s, the RHP is attributed to these clustering reactions. Identification of clusters in the APT data has been achieved using the core-linkage algorithm and they have been found to be quite small, containing only a few atoms up to a couple of tens of atoms. The RHP is governed by some critical number density of both Mg clusters and Cu-Mg co-clusters of a critical size, whereas Cu clusters do not contribute significantly to the hardening mechanism. Significance testing indicates that Mg clusters are more significant at smaller clusters sizes and Cu-Mg co-clusters more important at larger cluster sizes. Hardness results also confirm the existence of rapid early hardening during secondary ageing at 65ºC in Al-1.1Cu-1.7Mg. The mechanism of secondary rapid hardening involves a combination of both secondary clustering from solute (mainly Mg atoms) residual in solution, and pre-existing amorphous primary clusters that have slower growth kinetics at the lower secondary ageing temperature. The latter occurs mainly by vacancy-assisted diffusion of Mg atoms as evidenced by the gradual increase of the Mg:Cu ratio of co-clusters. From an alloy design point of view it is important to fully understand the solute distribution in the microstructure to be able to subsequently optimise the configuration for enhanced material properties. The change in dispersion of solute atoms during ageing was determined by combining calculations of % vacancy-solute associations with detailed measurements of the dislocation loops to estimate the solute distribution within the microstructure. The implication of the balance of solute atoms segregated to the loops compared with that in the matrix is then discussed in the context of hardnening mechanisms.
APA, Harvard, Vancouver, ISO, and other styles
3

Withrow, Travis P. "Computational Modeling of Atom Probe Tomography." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1525763934302517.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Engberg, David. "Atom Probe Tomography of TiSiN Thin Films." Licentiate thesis, Linköpings universitet, Tunnfilmsfysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122724.

Full text
Abstract:
This thesis concerns the wear resistant coating TiSiN and the development of the analysis technique atom probe tomography (APT) applied to this materials system. The technique delivers compositional information through time-of-flight mass spectrometry, with sub-nanometer precision in 3D for a small volume of the sample. It is thus a powerful technique for imaging the local distribution of elements in micro and nanostructures. To gain the full benefits of the technique for the materials system in question, I have developed a method that combines APT with isotopic substitution, here demonstrated by substitution of natN with 15N. This alters the time-of-flight of ions with of one or more N and will thereby enable the differentiation of the otherwise inseparable isotopes 14N and 28Si. Signs of small-scale fluctuations in the data led the development of an algorithm needed to properly visualize these fluctuations. A method to identify the best sampling parameter for visualization of small-scale compositional fluctuations was added to an algorithm originally designed to find the best sampling parameters for measuring and visualizing strong compositional variations. With the identified sampling parameters, the nano-scale compositional fluctuations of Si in the metal/metalloid sub-lattice could be visualized. The existence and size of these fluctuations were corroborated by radial distribution functions, a technique independent of the previously determined sampling parameter. The radial distribution function algorithm was also developed further to ease in the interpretation. The number of curves could thereby be reduced by showing elements, rather than single and molecular ions (of which there were several different kinds). The improvement of the algorithm also allowed interpretation of signs regarding the stoichiometry of SiNy. With a combination of analytical transmission electron microscopy and APT we show Si segregation on the nanometer scale in arc-deposited Ti0.92Si0.0815N and Ti0.81Si0.1915N thin films. APT composition maps and proximity histograms generated from Ti-rich domains show that the TiN contain at least ~2 at. % Si for Ti0.92Si0.08N and ~5 at. % Si for Ti0.81Si0.19N, thus confirming the formation of solid solutions. The formation of relatively pure SiNy domains in the Ti0.81Si0.19N films is tied to pockets between microstructured, columnar features in the film. Finer SiNy enrichments seen in APT possibly correspond to tissue layers around TiN crystallites, thus effectively hindering growth of TiN crystallites, causing TiN renucleation and thus explaining the featherlike nanostructure within the columns of these films.
APA, Harvard, Vancouver, ISO, and other styles
5

Yang, Qifeng. "Atom probe tomography research on catalytic alloys and nanoparticles." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:f3acdf37-3d23-4893-a4de-12e81712157a.

Full text
Abstract:
Catalyst is a key component in the chemical industry, with more than 90% of total chemical products reliant on their use. However, the working mechanisms are in many cases still not fully understood. For heterogeneous catalysts, in which the reactions normally occur on solid phase materials, a better understanding of the catalytic surfaces, and how they evolve under reactive environments is recognised as the next step forward in the field. This work presents a study utilising atom probe tomography (APT), combined with an in-situ reaction cell, to understand the initial oxidation processes of catalytic NiFe and NiCo model alloy systems. In order to improve reliability of results, a protocol was developed to clean the sample surfaces by field ion evaporation, eliminate sample surface contamination before in-situ oxidation was then performed. APT was successfully applied to these alloys to characterise oxide development as a function of exposure time and temperature. APT also demonstrated surface enrichment induced by oxide formation remained after reduction of the alloy. The successful application of APT on the model alloys led to the next goal which was to associate the data to real catalytic particles. To achieve this, work was extended into the field of nanoparticle catalysts. Nanoparticles with similar compositions to the model alloys were fabricated by chemical synthesis and were examined initially by transmission electron microscopy (TEM). The main goal of this phase was to investigate the surface segregation behaviour of the particles, identifying common behaviours with the model alloys. However, the presence of residual complex chemical environments around the particles following synthesis made APT analysis difficult. Therefore, an alternative method of particle fabrication was explored to better control the resulting materials for easier application of atom probe for nanoparticle analyses. Metallic nanoparticles of Ag, AuCu, AuNi, and AuNiMo were made by an inert gas condensation method, deposited on suitable support materials and were subsequently analysed by APT, facilitated by an improved sample preparation method. Surface segregation on individual nanoparticles was detected. Together with other complementary surface-probing techniques, a complete understanding of these particles from micrometre down to the level of individual particles was achieved. The potential for APT is highlighted to play a key role in this approach to realise a complete understanding of the chemical order, microstructure in multimetallic nanoparticles designed for catalysis.
APA, Harvard, Vancouver, ISO, and other styles
6

McCarroll, Ingrid. "Corrosion Processes: Through the lens of atom probe tomography." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18131.

Full text
Abstract:
1 Abstract The motivation behind the current work is twofold. In the first instance it stems from a desire to understand and advance knowledge and instrumentation in the field of atom probe tomography (APT). In the second instance it is driven by the need for rapid advancements in engineered materials to keep up with the energy requirements of a continuously developing and demanding technological world. Advances in the capabilities of APT have only recently made analysis of semi- and non- conductive materials possible, opening up the APT field to the corrosion science community. The current research is divided into two projects, each focusing on the oxidation of a different alloy type: alumina-forming FeCrAl alloys and magnesium alloys. The first material analysed was the alumina-forming FeCrAl alloy. These alloys produce a very thin protective oxide layer, even when exposed to high temperature oxidising environments. Presently, the concentrated solar power industry is looking to use supercritical CO2 (s-CO2) as a heat transfer fluid. The use of s-CO2 as the heat transfer fluid would facilitate higher input temperatures at the inlet of Brayton cycle turbines, thereby increasing the efficiency of the power plants. For the implementation of s-CO2 to be successful, a material is required that is capable of maintaining its mechanical properties under thermally cyclic conditions and exposure to a high temperature, high pressure, carbon containing and oxidising environment. In a preliminary study Kanthal APM, an alumina-forming FeCrAl alloy, is characterised under isothermal and cyclic conditions in a high temperature CO2 environment. This study relates to the use of FeCrAl alloys with supercritical CO2 in concentrated solar power plants. The results show that the alumina layer is highly impermeable to carbon penetration and performs well under isothermal and cyclic conditions. The second project focused on the oxidation of magnesium alloys. Magnesium alloys offer great potential as a lighter alternative to aluminium alloys within transport industries, providing economic and environmental incentives for their use. Before they can be more readily applied to these industries, a better understanding of the corrosion mechanisms of magnesium is required. For many years corrosion scientists have been trying to understand the corrosion processes of magnesium alloys, particularly processes relating to the observed negative difference effect (NDE). Although numerous theories have been put forward as to the cause of the NDE, much debate still remains around the subject and no clear evidence of the mechanism has been provided. In order to advance understanding of magnesium corrosion, the current research takes advantage of a new in-situ vacuum transfer system between an atom probe and a catalytic reaction cell. This system allows atomically clean magnesium surfaces to be exposed to O2 and H2O (g), and then returned, via vacuum, to the atom probe for analysis of the oxidation products. Results indicate that hydrogen acts as a catalyst to the oxidation of magnesium alloys in gaseous environments at room temperature and near atmospheric pressures. Integrated into the study of each material are developments in sample preparation methods. For the preparation of atom probe samples from non-conductive materials, such as the alumina formed on an FeCrAl alloy, a focused ion beam (FIB) is required. Preparation of an atom probe tip using FIB techniques is expensive due to the high costs associated with the FIB and time-consuming, especially when considering the training required to become skilled-enough users to prepare them. Therefore, an alternative sample preparation method for non-conductive samples has been devised. This method uses a broad ion beam (BIB) to produce the initial tip shapes ready for final stage FIB annular milling. Although this new method does not completely remove the need for FIB milling, it does significantly reduce the time required on the instrument and the skills needed by the user. For adequate analysis of controlled oxidation of magnesium alloys, an entirely new apparatus was employed. The brief for this new apparatus was that an atomically clean magnesium surface could be transferred from the atom probe analysis chamber to the catalytic reaction cell, and back again, under ultra high vacuum conditions. The experiments from the magnesium oxidation have provided the first successful results from this system, and expand on current coupled exposure and analysis techniques to provide exposure capabilities at room temperature and near atmospheric conditions whilst providing high spatial and chemical resolution of the resulting oxidation products. During the APT analysis of the oxidation of FeCrAl and magnesium alloys, a number of challenges regarding interpretation of the APT data from oxide-metal interfaces had to be addressed. First, the reconstruction of oxide-metal interfaces is known to contain a number of errors relating to assumptions made in the reconstruction algorithm. Second, the mass spectrum resulting from these interfaces are often of a high complexity and require significant efforts from the analyst to decipher. Initial observations from the alumina/FeCrAl alloy interface, led to further studies of the evaporation processes of numerous oxide-metal interfaces. A method for further understanding the evaporation processes for individual tips has been devised and evidence supporting suggestions of field driven penetration of oxygen into the metal substrate have also been provided. The complexity of the resulting mass spectrum from the magnesium alloys led to the development of a systematic peak identification process. This process resulted in the detection of a significant amount of hydrogen within the data. In response to the contention around the observation of hydrogen within atom probe data, a chapter has been devoted to the analysis and discussion of hydrogen within the current magnesium mass spectra. This analysis will provide a useful reference to others in their analysis of magnesium-oxide/hydroxide mass spectra. Atom probe tomography is a characterisation technique that has been used to study a wide variety of materials with its potential application continually expanding. The current body of work focuses on the application of atom probe tomography to questions relating to processes of oxidation in two different metal alloys. Although the corrosion mechanisms and the intended application of each alloy are significantly different, the challenges relating to the application of atom probe tomography to these alloys are congruous. The overarching focus of the current study is on improving the application of atom probe tomography to the study of corrosion products.
APA, Harvard, Vancouver, ISO, and other styles
7

Araullo-Peters, Vicente James. "Advancements in atomic-scale analytical methods and their application to understanding materials." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12770.

Full text
Abstract:
Atom probe tomography is a high resolution microscopy technique capable of determining the 3D location and chemical identification of individual atoms within a specimen. Though it is becoming ever more popular, a number of issues with the technique are known. First, the large amount of data created by atom probe tomography experiments requires new techniques to be developed so as to conduct effective analysis. Also, atom probe tomography is not traditionally considered a tool for crystallographic analysis even though crystallographic information is known to be present in reconstructed datasets. Though prior work has been done, the field of atom probe crystallography is underdeveloped. Furthermore, artefacts in the atom probe experiment and reconstruction are complicated and influence the resulting tomograms in subtle ways. The effects of these artefacts need to be understood so as to properly interpret atom probe results. This thesis contains seven manuscripts which discuss these issues. First, three manuscripts are presented which outline the development 3D orientation mapping of crystal grains in atom probe data, current computational approaches to atom probe data and a new framework for conducting crystallographic analysis of atom probe data. A fourth paper is presented which outlines and applies a new method to define and extract grain boundaries in atom probe datasets. Two papers are presented which discuss artefacts present in atom probe data, how they influence reconstructions and how to minimise errors resulting from these artefacts. A final manuscript is presented which applies several of the developed techniques to the analysis of the aerospace alloy, AA2198. Here, the microstructural evolution of AA2198 is characterised with particular emphasis on the strengthening T1 phase.
APA, Harvard, Vancouver, ISO, and other styles
8

Bennett, Samantha. "Nitride semiconductors studied by atom probe tomography and correlative techniques." Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/236685.

Full text
Abstract:
Optoelectronic devices fabricated from nitride semiconductors include blue and green light emitting diodes (LEDs) and laser diodes (LDs). To design efficient devices, the structure and composition of the constituent materials must be well-characterised. Traditional microscopy techniques used to examine nitride semiconductors include transmission electron microscopy (TEM), and atomic force microscopy (AFM). This thesis describes the study of nitride semiconductor materials using these traditional methods, as well as atom probe tomography (APT), a technique more usually applied to metals that provides three-dimensional (3D) compositional information at the atomic scale. By using both APT and correlative microscopy techniques, a more complete understanding of the material can be gained, which can potentially lead to higher-efficiency, longer-lasting devices. Defects, such as threading dislocations (TDs), can harm device performance. An AFM-based technique was used to show that TDs affect the local electrical properties of nitride materials. To investigate any compositional changes around the TD, APT studies of TDs were attempted, and evidence for oxygen enrichment near the TD was observed. The dopant level in nitride devices also affects their optoelectronic properties, and the combination of APT and TEM was used to show that Mg dopants were preferentially incorporated into pyramidal inversion domains, with a Mg content two orders of magnitude above the background level. Much debate has been focused on the microstructural origin of charge carrier localisation in InGaN. Alloy inhomogeneities have often been suggested to provide this localisation, yet APT has revealed InGaN quantum wells to be a statistically random alloy. Electron beam irradiation in the TEM caused damage to the InGaN, however, and a statistically significant deviation from a random alloy distribution was then observed by APT. The alloy homogeneity of InAlN was also studied, and this alloy system provided a unique opportunity to study gallium implantation damage to the APT sample caused during sample preparation by the focused ion beam (FIB). The combination of APT with traditional microscopy techniques made it possible to achieve a thorough understanding of a wide variety of nitride semiconductor materials.
APA, Harvard, Vancouver, ISO, and other styles
9

Chen, Yi-Sheng. "Characterisation of hydrogen trapping in steel by atom probe tomography." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:9d8ee66f-176d-4ac1-aad6-ccb33efc924d.

Full text
Abstract:
Hydrogen embrittlement (HE), which results in an unpredictable failure of metals, has been a major limitation in the design of critical components for a wide range of engineering applications, given the near-ubiquitous presence of hydrogen in their service environments. However, the exact mechanisms that underpin HE failure remain poorly understood. It is known that hydrogen, when free to diffuse in these materials, can tend to concentrate at a crack tip front. In turn, this facilitates crack propagation. Hence one of the proposed strategies for mitigating HE is to limit the content of freely diffusing hydrogen within the metal atomic lattice via the introduction of microstructural hydrogen traps. Further, it is empirically known that the introduction of finely-dispersed distribution of nano-sized carbide hydrogen traps in ferritic steel matrix can improve resilience to HE. This resilience has been attributed to the effective hydrogen trapping of the carbides. However, conclusive atomic-scale experimental evidence is still lacking as to the manner by which these features can impede the movement of the hydrogen. This lack of insight limits the further progress for the optimisation of the microstructural design of this type of HE-resistant steel. In order to further understand the hydrogen trapping phenomenon of the nano-sized carbide in steel, an appropriate characterisation method is required. Atom probe tomography (APT) has been known for its powerful combination of high 3D spatial and chemical resolution for the analysis of very fine precipitates. Furthermore, previous studies have shown that the application of isotopic hydrogen (2H) loading techniques, combined with APT, facilitates the hydrogen signal associated to fine carbides to be unambiguously identified. However, the considerable experimental requirements as utilised by these previous studies, particularly the instrumental capability necessary for retention of the trapped hydrogen in the needle-shaped APT specimen, limits the study being reproduced or extended. In this APT study, a model ferritic steel with finely dispersed V-Mo-Nb carbides of 10-20 nm is investigated. Initially, existing specialised instrumentation formed the basis of a cryogenic specimen chain under vacuum, so as to retain loaded hydrogen after an electrolytic charging treatment for APT analysis. This work confirms the importance of cryogenic treatment for the retention of trapped hydrogen in APT specimen. The quality of the obtained experimental data allows a quantitative analysis on the hydrogen trapping mechanism. Thus, it is conclusively determined that interior of the carbides studied in this steel acts as the hydrogen trapping site as opposed to the carbide/matrix interface as commonly expected. This result supports the theoretical investigations proposing that the hydrogen trapping within the carbide interior is enabled by a network of carbon vacancies. Based on the established importance of the specimen cold chain in these APT experiments, this work then successfully develops a simplified approach to cryo-transfer which requires no instrumental modification. In this approach there is no requirement for the charged specimen to be transferred under vacuum conditions. The issue of environmental-induced ice contamination on the cryogenic sample surface in air transfer is resolved by its sublimation in APT vacuum chamber. Furthermore, the temperature of the transferred sample is able to be determined independently by both monitoring changes to vacuum pressure in the buffer chamber and also the thermal response of the APT sample stage in the analysis chamber. This simplified approach has the potential to open up a range of hydrogen trapping studies to any commercial atom probe instrument. Finally, as an example of the use of this simplified cryo-transfer technique, targeted studies for determining the source of hydrogen adsorption during electropolishing and electrolytic loading process are demonstrated. This research provides a critical verification of hydrogen trapping mechanism of fine carbides as well as an achievable experimental protocol for the observation of the trapping of individual hydrogen atoms in alloy microstructures. The methods developed here have the potential to underpin a wide range of possible experiments which address the HE problem, particularly for the design of new mitigation strategies to prevent this critical issue.
APA, Harvard, Vancouver, ISO, and other styles
10

Oberdorfer, Christian [Verfasser], and Guido [Akademischer Betreuer] Schmitz. "Numeric simulation of atom probe tomography / Christian Oberdorfer ; Betreuer: Guido Schmitz." Münster : Universitäts- und Landesbibliothek Münster, 2014. http://d-nb.info/1138282715/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Atom probe tomograpghy"

1

Miller, M. K. Atom Probe Tomography. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4281-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Miller, Michael K., and Richard G. Forbes. Atom-Probe Tomography. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Larson, David J., Ty J. Prosa, Robert M. Ulfig, Brian P. Geiser, and Thomas F. Kelly. Local Electrode Atom Probe Tomography. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8721-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Larson, David J. Local electrode atom probe tomography: A user's guide. New York: Springer, 2013.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Miller, M. K. Atom probe tomography: Analysis at the atomic level. New York: Kluwer Academic / Plenum Publishers, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Atom Probe Tomography: Analysis at the Atomic Level. Boston, MA: Springer US, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Lefebvre, Williams, Francois Vurpillot, and Xavier Sauvage. Atom Probe Tomography. Elsevier Science & Technology Books, 2016.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Atom Probe Tomography. Elsevier, 2016. http://dx.doi.org/10.1016/c2015-0-01720-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Miller, Michael K., and Richard G. Forbes. Atom-Probe Tomography: The Local Electrode Atom Probe. Springer, 2014.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Atom-Probe Tomography: The Local Electrode Atom Probe. Springer, 2014.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Atom probe tomograpghy"

1

Kelly, Thomas F. "Atom-Probe Tomography." In Springer Handbook of Microscopy, 715–63. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00069-1_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Miller, Michael K., and Richard G. Forbes. "Introduction to Atom-Probe Tomography." In Atom-Probe Tomography, 1–49. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Miller, Michael K., and Richard G. Forbes. "Introduction to the Physics of Field Ion Emitters." In Atom-Probe Tomography, 51–109. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Miller, Michael K., and Richard G. Forbes. "Field Evaporation and Related Topics." In Atom-Probe Tomography, 111–87. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Miller, Michael K., and Richard G. Forbes. "The Art of Specimen Preparation." In Atom-Probe Tomography, 189–228. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Miller, Michael K., and Richard G. Forbes. "The Local Electrode Atom Probe." In Atom-Probe Tomography, 229–58. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Miller, Michael K., and Richard G. Forbes. "Data Reconstruction." In Atom-Probe Tomography, 259–302. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Miller, Michael K., and Richard G. Forbes. "Data Analysis." In Atom-Probe Tomography, 303–45. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4899-7430-3_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Miller, M. K. "Overview and Historical Evolution." In Atom Probe Tomography, 1–23. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4281-0_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Miller, M. K. "The Art of Specimen Preparation." In Atom Probe Tomography, 25–44. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4281-0_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Atom probe tomograpghy"

1

Bunton, J. H., D. Lenz, J. D. Olson, K. Thompson, R. M. Ulfig, D. J. Larson, E. Oltman, and T. F. Kelly. "Instrumentation Developments in Atom Probe Tomography." In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335294.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Blavette, D., E. Cadel, D. Mangelinck, K. Hoummada, R. Larde, F. Vurpillot, B. Gault, et al. "Laser Atom Probe Tomography: some applications." In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335352.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Nelson, William, Austin Akey, Julia Hammer, and Steve Parman. "Atom by Atom: Investigating phosphorus in olivine using atom probe tomography." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12543.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Lawrence, D. F., R. M. Ulfig, D. J. Larson, D. P. Olson, D. A. Reinhard, I. Y. Martin, S. Strennen, and P. H. Clifton. "Routine Device-Level Atom Probe Analysis." In ISTFA 2014. ASM International, 2014. http://dx.doi.org/10.31399/asm.cp.istfa2014p0019.

Full text
Abstract:
Abstract Continuing advances in Atom Probe Tomography and Focused Ion Beam Scanning Electron Microscope technologies along with the development of new specimen preparation approaches have resulted in reliable methods for acquiring 3D subnanometer compositional data from device structures. The routine procedure is demonstrated here by the analysis of the silicon-germanium source-drain region of a field effect transistor from a de-packaged off-the-shelf 28 nm design rule graphics chip. The center of the silicon-germanium sourcedrain region was found to have approximately 180 ppm of boron and the silicide contact was found to contain both titanium and platinum.
APA, Harvard, Vancouver, ISO, and other styles
5

Miaja-Avila, Luis, Ann N. Chiaramonti, Paul T. Blanchard, Norman A. Sanford, David R. Diercks, and Brian P. Gorman. "Atom Probe Tomography with Extreme-Ultraviolet Light." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2019. http://dx.doi.org/10.1364/cleo_si.2019.sf2g.6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Miaja Avila, Luis, Ann Chiaramonti, Benjamin Caplins, David Diercks, Brian Gorman, and Norman Sanford. "Atom probe tomography using Extreme-Ultraviolet Light." In Metrology, Inspection, and Process Control for Microlithography XXXIV, edited by Ofer Adan and John C. Robinson. SPIE, 2020. http://dx.doi.org/10.1117/12.2551898.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Geiser, B. P., J. Schneir, J. Roberts, S. Wiener, D. J. Larson, and T. F. Kelly. "Spatial Distribution Maps for Atom Probe Tomography." In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335314.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Prosa, T. J., S. L. P. Kostrna, and T. F. Kelly. "Laser Atom Probe Tomography: Application to Polymers." In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335331.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Foley, Michelle, Elias Bloch, Stephan Gerstl, Benita Putlitz, and Lukas P. Baumgartner. "ATOM PROBE TOMOGRAPHY OF MAGMATIC ZIRCON XENOCRYSTS." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-380016.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Prosa, Ty J., Brian P. Geiser, Dan Lawrence, David Olson, and David J. Larson. "Developing detection efficiency standards for atom probe tomography." In SPIE NanoScience + Engineering, edited by Michael T. Postek. SPIE, 2014. http://dx.doi.org/10.1117/12.2062211.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Atom probe tomograpghy"

1

Edmondson, Philip D. An On-Axis Tomography Holder for Correlative Electron and Atom Probe Microscopy. Office of Scientific and Technical Information (OSTI), October 2018. http://dx.doi.org/10.2172/1479802.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sanford, Norman A. Laser-assisted atom probe tomography of c-plane and m-plane InGaN test structures. National Institute of Standards and Technology, April 2022. http://dx.doi.org/10.6028/nist.tn.2201.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Wells, Peter, and G. Robert Odette. Status Summary of FY16 Atom Probe Tomography Studies on UCSB ATR-2 Irradiated RPV Steels. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1364468.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Knipling, Keith, Fred Meisenkothen, and Eric B. Steel. Proceedings of the International Conference on Atom-Probe Tomography and Microscopy (APT&M 2018). National Institute of Standards and Technology, December 2019. http://dx.doi.org/10.6028/nist.sp.2100-03.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tiley, J., O. Senkov, G. Viswanathan, S. Nag, R. Banerjee, and J. Hwang. Determination of Gamma-Prime Site Occupancies in Nickel Superalloys Using Atom Probe Tomography and X-Ray Diffraction (Preprint). Fort Belvoir, VA: Defense Technical Information Center, August 2012. http://dx.doi.org/10.21236/ada563340.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Miller, M. K. Atom Probe Tomography Characterization of the Solute Distributions in a Neutron-Irradiated and Annealed Pressure Vessel Steel Weld. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/777685.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Atom probe tomograpghy' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography