Kirchheim, Reiner

[["dc.bibliographiccitation.firstpage","709"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Scripta Materialia"],["dc.bibliographiccitation.lastpage","712"],["dc.bibliographiccitation.volume","62"],["dc.contributor.author","Tal-Gutelmacher, E."],["dc.contributor.author","Pundt, Astrid"],["dc.contributor.author","Kirchheim, Reiner"],["dc.date.accessioned","2018-11-07T08:43:53Z"],["dc.date.available","2018-11-07T08:43:53Z"],["dc.date.issued","2010"],["dc.description.abstract","The effect of residual hydrogen, sorbed during the deposition process, on the hydrogenation behavior of ion-beam sputtered titanium thin films was investigated. Electromotive force and in situ stress measurements were conducted to study hydrogen absorption, phase boundaries and hydrogen-induced stress development in the Ti-H thin film system. Tests were conducted on both as-sputtered and previously discharged films; the effect of residual hydrogen is significantly manifested in the thermodynamic isotherms and stress-concentration curves. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved."],["dc.description.sponsorship","Alexander von Humboldt foundation"],["dc.identifier.doi","10.1016/j.scriptamat.2010.01.037"],["dc.identifier.isi","000275933700020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20077"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","1359-6462"],["dc.title","The effect of residual hydrogen on hydrogenation behavior of titanium thin films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2198"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Journal of Materials Science"],["dc.bibliographiccitation.lastpage","2205"],["dc.bibliographiccitation.volume","44"],["dc.contributor.author","Gegner, J."],["dc.contributor.author","Hoerz, G."],["dc.contributor.author","Kirchheim, Reiner"],["dc.date.accessioned","2018-11-07T08:30:23Z"],["dc.date.available","2018-11-07T08:30:23Z"],["dc.date.issued","2009"],["dc.description.abstract","The solid solubility c(O) of oxygen in palladium in equilibrium with gaseous oxygen has been determined from absorption-desorption experiments for temperatures T of 1123 and 1173 K and oxygen partial pressures p(O2) between 2.7 x 10(3) and 4.0 x 10(4) Pa. The relationship between c(O), p(O2) and T is given by c(O) = a root p(O2) exp(-Delta H(s)/RT), where R = 8.314 JK(-1) mol(-1) is the universal gas constant, Delta H(s) = - 13.55 kJ/mol denotes the heat of solution of oxygen in palladium and the constant a amounts to 4.26 x 10(-5) at.%/root Pa or 6.41 x 10(-8) wt%/root Pa. The diffusion coefficient D(O) of oxygen in solid palladium has been determined by incomplete isothermal internal oxidation of Pd-Fe alloys using the data on the oxygen solubility in palladium. The temperature dependence of D(O) obeys the Arrhenius equation D(O) = D(0)exp(-E(d)/RT) with pre-exponential factor D(0) = 2.33 x 10(-7) m(2)/s and activation energy of diffusion of oxygen in palladium, E(d) = 102.76 kJ/mol"],["dc.identifier.doi","10.1007/s10853-008-2923-4"],["dc.identifier.isi","000265214500004"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11184"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16885"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0022-2461"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","Diffusivity and solubility of oxygen in solid palladium"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","479"],["dc.bibliographiccitation.journal","Journal of Alloys and Compounds"],["dc.bibliographiccitation.lastpage","483"],["dc.bibliographiccitation.volume","446"],["dc.contributor.author","Cizek, Jakub"],["dc.contributor.author","Proeger, Till E."],["dc.contributor.author","Danis, Stanislav"],["dc.contributor.author","Cieslar, M."],["dc.contributor.author","Brauer, Gerhard"],["dc.contributor.author","Anwand, W."],["dc.contributor.author","Kirchheim, Reiner"],["dc.contributor.author","Pundt, Astrid"],["dc.date.accessioned","2018-11-07T10:57:35Z"],["dc.date.available","2018-11-07T10:57:35Z"],["dc.date.issued","2007"],["dc.description.abstract","The introduction of new defects due to H-loading of Nb, their population as a function of the H concentration, and the mechanism of their formation are investigated by positron annihilation spectroscopy (PAS). In addition, X-ray diffraction (XRD), and transmission electron microscopy (TEM) are applied. Furthermore, the results obtained by the experimental techniques are compared with theoretical calculations of energetic stability and positron characteristics of various defect-H configurations. It is found that vacancies surrounded by H atoms are introduced into the specimens by H-loading. The density of these vacancy-H complexes increases with increasing concentration of H in the specimens. The H-induced vacancies are formed even in the alpha-phase field, when the metal-H system is a single phase solid solution. The stability of the H-induced defects and the mechanism of their formation are discussed. (C) 2006 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.jallcom.2006.11.105"],["dc.identifier.isi","000250822900102"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50289"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.publisher.place","Lausanne"],["dc.relation.conference","10th International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications"],["dc.relation.eventlocation","Lahaina, HI"],["dc.relation.issn","0925-8388"],["dc.title","Hydrogen-induced defects in niobium"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","224106"],["dc.bibliographiccitation.issue","22"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW B"],["dc.bibliographiccitation.volume","69"],["dc.contributor.author","Cizek, Jakub"],["dc.contributor.author","Prochazka, Ivan"],["dc.contributor.author","Becvar, F."],["dc.contributor.author","Kuzel, R."],["dc.contributor.author","Cieslar, M."],["dc.contributor.author","Brauer, Gerhard"],["dc.contributor.author","Anwand, W."],["dc.contributor.author","Kirchheim, Reiner"],["dc.contributor.author","Pundt, Astrid"],["dc.date.accessioned","2018-11-07T10:48:43Z"],["dc.date.available","2018-11-07T10:48:43Z"],["dc.date.issued","2004"],["dc.description.abstract","Our aim in the present work was to investigate changes of the defect structure of bulk niobium induced by hydrogen loading. The evolution of the microstructure with increasing hydrogen concentration was studied by x-ray diffraction and two complementary techniques of positron annihilation spectroscopy (PAS), namely positron lifetime spectroscopy and slow positron implantation spectroscopy with the measurement of Doppler broadening, in defect-free Nb (99.9%) and Nb containing a remarkable number of dislocations. These samples were electrochemically loaded with hydrogen up to x(H)=0.06 [H/Nb], i.e., in the alpha-phase region, and it was found that the defect density increases with hydrogen concentration in both Nb samples. This means that hydrogen-induced defects are created in the Nb samples. A comparison of PAS results with theoretical calculations revealed that vacancy-hydrogen complexes are introduced into the samples due to hydrogen loading. Most probably these are vacancies surrounded by 4 hydrogen atoms."],["dc.identifier.doi","10.1103/PhysRevB.69.224106"],["dc.identifier.isi","000222530900027"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48260"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","2469-9969"],["dc.relation.issn","2469-9950"],["dc.title","Hydrogen-induced defects in bulk niobium"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","S1359645422002130"],["dc.bibliographiccitation.firstpage","117826"],["dc.bibliographiccitation.journal","Acta Materialia"],["dc.bibliographiccitation.volume","229"],["dc.contributor.author","Vazquez-Arce, J.L."],["dc.contributor.author","Tiznado, H."],["dc.contributor.author","Kirchheim, R."],["dc.date.accessioned","2022-06-01T09:40:08Z"],["dc.date.available","2022-06-01T09:40:08Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1016/j.actamat.2022.117826"],["dc.identifier.pii","S1359645422002130"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/108643"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-572"],["dc.relation.issn","1359-6454"],["dc.rights.uri","https://www.elsevier.com/tdm/userlicense/1.0/"],["dc.title","Onset of electronic conductivity in nanometer thick films of yttria stabilized zirconia (YSZ) at high electric fields"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","48"],["dc.bibliographiccitation.journal","Scripta Materialia"],["dc.bibliographiccitation.lastpage","51"],["dc.bibliographiccitation.volume","98"],["dc.contributor.author","Chen, Y. Z."],["dc.contributor.author","Ma, X. Y."],["dc.contributor.author","Shi, X. H."],["dc.contributor.author","Suo, T."],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Zhang, Kunhua"],["dc.contributor.author","Liu, F."],["dc.contributor.author","Kirchheim, Reiner"],["dc.date.accessioned","2018-11-07T09:59:40Z"],["dc.date.available","2018-11-07T09:59:40Z"],["dc.date.issued","2015"],["dc.description.abstract","Well-annealed Pd and Pd-H alloys were subjected to tensile tests. It is found that the presence of H does not affect the yield strength but enhances the strain hardening of Pd remarkably. This is explained by a negligible solute drag effect of H on the movement of dislocations, and by H-induced enhanced multiplication of dislocations upon plastic deformation, respectively. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.scriptamat.2014.11.012"],["dc.identifier.isi","000348965500013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37648"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1359-6462"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Hardening effects in plastically deformed Pd with the addition of H"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","262"],["dc.bibliographiccitation.journal","Acta Materialia"],["dc.bibliographiccitation.lastpage","267"],["dc.bibliographiccitation.volume","155"],["dc.contributor.author","Martin, May L."],["dc.contributor.author","Pundt, Astrid"],["dc.contributor.author","Kirchheim, Reiner"],["dc.date.accessioned","2020-12-10T14:14:52Z"],["dc.date.available","2020-12-10T14:14:52Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.actamat.2018.06.011"],["dc.identifier.issn","1359-6454"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71529"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Hydrogen-induced accelerated grain growth in vanadium"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","483"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde)"],["dc.bibliographiccitation.lastpage","487"],["dc.bibliographiccitation.volume","100"],["dc.contributor.author","Kirchheim, Reiner"],["dc.date.accessioned","2018-11-07T08:31:09Z"],["dc.date.available","2018-11-07T08:31:09Z"],["dc.date.issued","2009"],["dc.description.abstract","It will be shown that there is an analogy between surfactants in liquids which stabilize structures With large surface areas such as foams or microemulsions, and certain components in a crystalline solid, which stabilize defects such as grain boundaries and dislocations. These components are then called defactants. In the presence of defactants microstructural chances may occur because sonic of the defects compete more successfully for segregation of the defactants than others. Thus voids are formed at grain boundaries of Cu-Bi alloys because the formation energy of voids is provided by the interaction energy of Bi-atoms of the newly created surface. Or the beneficial role of rhenium on the high temperature creep of superalloys may be interpreted as a deficiency of defactants stabilizing dislocations and/or vacancies. These examples are discussed in the present work after a general treatment of the role of defactants."],["dc.description.sponsorship","Deutsche Forchungsgemeinschaft"],["dc.identifier.doi","10.3139/146.110065"],["dc.identifier.isi","000265488500003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17056"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Carl Hanser Verlag"],["dc.relation.issn","1862-5282"],["dc.title","On the solute-defect interaction in the framework of a defactant concept"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","241"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Applied Surface Science"],["dc.bibliographiccitation.lastpage","244"],["dc.bibliographiccitation.volume","255"],["dc.contributor.author","Cizek, Jakub"],["dc.contributor.author","Prochazka, Ivan"],["dc.contributor.author","Vlach, Martin"],["dc.contributor.author","Zaludova, N."],["dc.contributor.author","Danis, Stanislav"],["dc.contributor.author","Dobron, Patrik"],["dc.contributor.author","Chmelik, F."],["dc.contributor.author","Brauer, Gerhard"],["dc.contributor.author","Anwand, W."],["dc.contributor.author","Muecklich, Arndt"],["dc.contributor.author","Nikitin, E."],["dc.contributor.author","Gemma, Ryota"],["dc.contributor.author","Kirchheim, Reiner"],["dc.contributor.author","Pundt, Astrid"],["dc.date.accessioned","2018-11-07T11:09:48Z"],["dc.date.available","2018-11-07T11:09:48Z"],["dc.date.issued","2008"],["dc.description.abstract","Hydrogen loading of thin films introduces very high compressive stresses which grow in magnitude with increasing hydrogen concentration. When the hydrogen-induced stresses exceed a certain critical in-plane stress value, the loaded film starts to detach from the substrate. This results in the formation of buckles of various morphologies in the film layer. Defect studies of a hydrogen loaded Pd film which undergoes a buckling process are presented, using slow positron implantation spectroscopy, in situ acoustic emission, and direct observations of the film structure by transmission electron and optical microscopies. It is found that buckling of the film occurs at hydrogen concentrations x(H) >= 0.1 and causes a significant increase of the dislocation density in the film. (c) 2008 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.apsusc.2008.05.290"],["dc.identifier.isi","000259726900065"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53087"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.publisher.place","Amsterdam"],["dc.relation.conference","11th Workshop on Slow Position Beam Techniques for Solids and Surfaces"],["dc.relation.eventlocation","Musee Sci Naturelles, Orleans, FRANCE"],["dc.relation.issn","0169-4332"],["dc.title","Hydrogen-induced buckling of Pd films studied by positron annihilation"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","347"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Microscopy and Microanalysis"],["dc.bibliographiccitation.lastpage","353"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Choi, Pyuck-Pa"],["dc.contributor.author","Al-Kassab, Tala'at"],["dc.contributor.author","Kwon, Young-Soon"],["dc.contributor.author","Kim, Ji-Soon"],["dc.contributor.author","Kirchheim, Reiner"],["dc.date.accessioned","2018-11-07T10:58:16Z"],["dc.date.available","2018-11-07T10:58:16Z"],["dc.date.issued","2007"],["dc.description.abstract","Focused ion-beam milling has been applied to prepare needle-shaped atom probe tomography specimens from mechanically alloyed powders without the use of embedding media. The lift-out technique known from transmission electron microscopy specimen preparation was modified to cut micron-sized square cross-sectional blanks out of single powder particles. A sequence of rectangular cuts and annular milling showed the highest efficiency for sharpening the blanks to tips. First atom probe results on a Fe(95)Cu(5) powder mechanically alloyed in a high-energy planetary ball mill for 20 h have been obtained. Concentration profiles taken from this powder sample showed that the Cu distribution is inhomogeneous on a nanoscale and that the mechanical alloying process has not been completed yet. In addition, small clusters of oxygen, stemming from the ball milling process, have been detected. Annular milling with 30 keV Ga ions and beam currents >= 50 pA was found to cause the formation of an amorphous surface layer, whereas no structural changes could be observed for beam currents <= 10 pA."],["dc.identifier.doi","10.1017/S1431927607070717"],["dc.identifier.isi","000250127700006"],["dc.identifier.pmid","17900385"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50440"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cambridge Univ Press"],["dc.relation.issn","1431-9276"],["dc.title","Application of focused ion beam to atom probe tomography specimen preparation from mechanically alloyed powders"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]