Borchers, Christine

[["dc.bibliographiccitation.firstpage","5259"],["dc.bibliographiccitation.issue","16/17"],["dc.bibliographiccitation.journal","Journal of Materials Science"],["dc.bibliographiccitation.lastpage","5262"],["dc.bibliographiccitation.volume","39"],["dc.contributor.author","Borchers, C."],["dc.contributor.author","Leonov, A. V."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Morozova, O. S."],["dc.date.accessioned","2022-01-21T12:59:41Z"],["dc.date.available","2022-01-21T12:59:41Z"],["dc.date.issued","2004"],["dc.identifier.doi","10.1023/B:JMSC.0000039223.05607.76"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/98513"],["dc.identifier.url","https://publications.goettingen-research-online.de/handle/2/47839"],["dc.relation.issn","0022-2461"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Mechanism and kinetics of mechanically induced transformation of titanium and titanium hydride: Effect of reaction medium on microstructure, morphology and hydrogen-uptake properties"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","80"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Thermochimica Acta"],["dc.bibliographiccitation.lastpage","84"],["dc.bibliographiccitation.volume","493"],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Leonov, Alexander V."],["dc.contributor.author","Morozova, Olga S."],["dc.date.accessioned","2018-11-07T11:24:22Z"],["dc.date.available","2018-11-07T11:24:22Z"],["dc.date.issued","2009"],["dc.description.abstract","Structural changes of commercial TiH2 were studied using interrupted temperature desorption spectroscopy and X-ray diffraction techniques to understand the mechanism of its degradation under non-equilibrium conditions. Rapid cooling on different stages of temperature-programmed heating allowed to study the intermediate phase compositions that evolve upon cooling from the high-temperature phase beta Ti(H). The phase transformation sequence is described as a number of consecutive reactions corresponding to the observed desorption peaks. Phases delta TiH2-x, gamma TiH, and the solid solution alpha Ti(H) were found to be intermediates in the epsilon TiH2 --> alpha Ti transformation when the latter is interrupted. Additional evidence for the thermodynamic stability of gamma TiH is given. (C) 2009 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","RFBR [07-03-00610]; INTAS [05-1000005-7672]"],["dc.identifier.doi","10.1016/j.tca.2009.04.011"],["dc.identifier.isi","000269098300014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56388"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1872-762X"],["dc.relation.issn","0040-6031"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Interrupted thermal desorption of TiH2"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","309"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Journal of Alloys and Compounds"],["dc.bibliographiccitation.lastpage","312"],["dc.bibliographiccitation.volume","483"],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Leonov, Alexander V."],["dc.contributor.author","Kurmaev, Ernst Z."],["dc.contributor.author","Moewes, A."],["dc.date.accessioned","2018-11-07T11:25:35Z"],["dc.date.available","2018-11-07T11:25:35Z"],["dc.date.issued","2009"],["dc.description.abstract","Mechanically activated TiH2/h-BN, TiH2/C and TiH2/B mixtures was studied by temperature-programmed desorption, X-ray diffraction, transmission electron microscopy and X-ray emission spectroscopy. Ball milling in the presence of additives results in a modification of hydrogen occupation sites. Additional Ti-N, Ti-C or Ti-B bonds from chemical bonding of Ti with interstitial N, C and B atoms, are formed in TiH2 due to contact of TiH2 nanoparticles with the respective additive matrix materials. Mixed configurations around Ti atoms with proportional combination of local Ti-H and Ti-N, Ti-C or Ti-B bonds significantly decrease the thermal stability of TiH2. The effect is most pronounced when boron is the additive. (C) 2008 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.jallcom.2008.08.093"],["dc.identifier.isi","000270619600075"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56655"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.publisher.place","Lausanne"],["dc.relation.conference","14th International Symposium on Metastable and Nano-Materials"],["dc.relation.eventend","2007-08-30"],["dc.relation.eventlocation","Corfu, Greece"],["dc.relation.eventstart","2007-08-26"],["dc.relation.issn","0925-8388"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Effect of N, C and B interstitial atoms on local bonding structure in mechanically activated TiH2/h-BN, TiH2/C, and TiH2/B mixtures"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","240"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Journal of Alloys and Compounds"],["dc.bibliographiccitation.lastpage","246"],["dc.bibliographiccitation.volume","395"],["dc.contributor.author","Kurmaev, Ernst Z."],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Nemnonov, S. N."],["dc.contributor.author","Harada, Y."],["dc.contributor.author","Tokushima, T."],["dc.contributor.author","Osawa, H."],["dc.contributor.author","Takeuchi, T."],["dc.contributor.author","Shin, S."],["dc.date.accessioned","2018-11-07T10:59:22Z"],["dc.date.available","2018-11-07T10:59:22Z"],["dc.date.issued","2005"],["dc.description.abstract","The local bonding structure of mechanically activated TiH2 and TiH2/graphite mixture is studied by means of temperature-programmed desorption (TPD), X-ray emission- and absorption-spectroscopy. Ball milling of TiH2 in the presence of graphite results in a modification of the hydrogen occupation sites. Additional Ti-C bonds from chemical bonding of Ti with carbon, which occupies octahedral interstitials, appears in TiH2 due to intimate contact between graphite and TiH2 nanoparticles embedded into an amorphous graphite matrix. Mixed configurations around Ti atoms with proportional combination of local Ti-H and Ti-C bonds significantly decrease the thermal stability of TiH2. © 2004 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.jallcom.2004.11.031"],["dc.identifier.isi","000229410600044"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50682"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0925-8388"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Local bonding structure in mechanically activated TiH2 and TiH2 plus graphite mixture"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5869"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry. C, Nanomaterials and interfaces"],["dc.bibliographiccitation.lastpage","5879"],["dc.bibliographiccitation.volume","112"],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Leonov, Alexander V."],["dc.contributor.author","Postnikov, A. V."],["dc.contributor.author","Kurmaev, Ernst Z."],["dc.contributor.author","Moewes, A."],["dc.contributor.author","Pundt, A."],["dc.date.accessioned","2018-11-07T11:16:03Z"],["dc.date.available","2018-11-07T11:16:03Z"],["dc.date.issued","2008"],["dc.description.abstract","The effect of h-BN additive on hydrogen sorption by Ti under mechanical treatment in H-2/He flow and on the thermal stability of Ti-hydride produced during milling were studied using kinetic, structural, microscopic, and spectroscopic techniques and theoretical first-principles calculations. The results obtained were compared with the corresponding properties of pure Ti and Ti with graphite additive. Like graphite, hexagonal BN was found to be an effective additive to improve the hydrogen sorption capacity of Ti. New types of occupation sites available for hydrogen, very similar to those detected for Ti/C, were observed. These sites are characterized by a low H-2 desorption temperature: 630-670 K instead of similar to 1000 K."],["dc.identifier.doi","10.1021/jp077582s"],["dc.identifier.isi","000254883100029"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/54505"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1932-7447"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Effect of h-BN additive on hydrogen sorption by Ti under mechanical treatment in H-2/He flow"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","10341"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry B"],["dc.bibliographiccitation.lastpage","10347"],["dc.bibliographiccitation.volume","109"],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Leonov, Alexander V."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Morozova, Olga S."],["dc.date.accessioned","2018-11-07T10:59:48Z"],["dc.date.available","2018-11-07T10:59:48Z"],["dc.date.issued","2005"],["dc.description.abstract","The effect of graphite admixture on hydrogen sorption-desorption properties of mechanically activated electron microscopy, temperature-programmed reaction, and temperature-programmed desorption techniques. The major effect of graphite addition was found to be the formation of microporous carbon matrix particles containing randomly distributed titanium particles only several nanometers in diameter. This powder architecture enhances hydrogen transport to the titanium surface without hindrances and promotes titanium-hydrogen interaction by modifying the titanium surface and subsurface layers with interstitial carbon atoms."],["dc.identifier.doi","10.1021/jp0406870"],["dc.identifier.isi","000229296600064"],["dc.identifier.pmid","16852253"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50782"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1520-6106"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Stimulating effect of graphite admixture on hydrogen sorption - Desorption properties of mechanically activated titanium powder"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","757"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Current Nanoscience"],["dc.bibliographiccitation.lastpage","769"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Leonov, Alexander V."],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Cizek, Jakub"],["dc.contributor.author","Prochazka, Ivan"],["dc.contributor.author","Shkvarin, A. S."],["dc.contributor.author","Kurmaev, Ernst Z."],["dc.contributor.author","Moewes, A."],["dc.date.accessioned","2018-11-07T08:50:49Z"],["dc.date.available","2018-11-07T08:50:49Z"],["dc.date.issued","2011"],["dc.description.abstract","Morphological, structural and chemical evolution in Ti/B/H-2 system is studied in detail as a function of mechanical treatment. Ti/B powder continuously changes both in composition and morphology during ball-milling in H-2 flow: The powder composition varies from Ti/B to TiH2-x/B causing a change in mechanical properties. The role of boron additive also changes from preventing the Ti nanoparticles from sticking together in the early stages to a matrix material participating in Ti - B interface reactions in the intermediate and final stages of the process. Boron atoms participating in the formation of nanoscopic holes give rise to new H states in the hydride by changing the local atomic state of Ti atoms. The dynamics of the formation of these sites and the redistribution of hydrogen between different types of occupation sites in dependence of phase composition and milling time of the powders are also studied."],["dc.identifier.doi","10.2174/157341311797483817"],["dc.identifier.isi","000299678400013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21779"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1573-4137"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Boron Enhanced Synthesis of Ti-hydride Nanoparticles by Milling Ti/B in Hydrogen Flow"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","196"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry B"],["dc.bibliographiccitation.lastpage","204"],["dc.bibliographiccitation.volume","110"],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Galakhov, A. V."],["dc.contributor.author","Kurmaev, Ernst Z."],["dc.contributor.author","McNaughton, J."],["dc.contributor.author","Yabloskikh, M. V."],["dc.contributor.author","Moewes, A."],["dc.date.accessioned","2018-11-07T10:26:46Z"],["dc.date.available","2018-11-07T10:26:46Z"],["dc.date.issued","2006"],["dc.description.abstract","The effect of graphite addition on the mechanism of hydrogen uptake by titanium during mechanochemical activation in hydrogen flow was studied using kinetic, structural, microscopic, and spectroscopic techniques. As was found, already a small graphite admixture of about 0.5 wt % changed the kinetics of mechanically induced H-2 sorption and significantly stimulated Ti-H-2 interaction. Two new types of occupation sites available for hydrogen were observed, which are characterized by low H-2 desorption temperatures: about 650 and 750 K instead of 1000 K."],["dc.identifier.doi","10.1021/jp054505t"],["dc.identifier.isi","000234520700038"],["dc.identifier.pmid","16471521"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43113"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1520-6106"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Influence of graphite addition on the reactivity of Ti powder with H-2 under ball milling"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","82"],["dc.bibliographiccitation.issue","1-3"],["dc.bibliographiccitation.journal","Chemical Physics Letters"],["dc.bibliographiccitation.lastpage","85"],["dc.bibliographiccitation.volume","465"],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Leonov, Alexander V."],["dc.contributor.author","Kurmaev, Ernst Z."],["dc.contributor.author","Moewes, A."],["dc.contributor.author","Pundt, Astrid"],["dc.date.accessioned","2018-11-07T11:09:14Z"],["dc.date.available","2018-11-07T11:09:14Z"],["dc.date.issued","2008"],["dc.description.abstract","The effect of graphite and BN on hydrogen absorption by Ti under milling in H-2/He flow and on the thermal stability of Ti-hydride produced during milling is compared. BN is the more effective additive than graphite to improve hydrogen sorption capacity of Ti because of the stimulation of a higher hydrogen uptake. Both additives stimulate the formation of occupation sites characterized by a H-2 desorption temperature that is up to 400 K lower than that of pure Ti. The reasons for the higher performance of hexagonal BN as compared to graphite are found to be entropic in nature. (c) 2008 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.cplett.2008.09.054"],["dc.identifier.isi","000260259100017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52962"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0009-2614"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Ti/C and Ti/h-BN nanocomposites: Comparison of hydrogen sorption/desorption properties"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","S754"],["dc.bibliographiccitation.journal","Journal of Alloys and Compounds"],["dc.bibliographiccitation.lastpage","S758"],["dc.bibliographiccitation.volume","509"],["dc.contributor.author","Morozova, Olga S."],["dc.contributor.author","Khomenko, T. I."],["dc.contributor.author","Borchers, Christine"],["dc.contributor.author","Leonov, Alexander V."],["dc.date.accessioned","2018-11-07T08:52:07Z"],["dc.date.available","2018-11-07T08:52:07Z"],["dc.date.issued","2011"],["dc.description.abstract","Interrupted thermal desorption and X-ray diffraction techniques were used to study the effect of graphite and boron additives on non-equilibrium decomposition of mechanically activated commercial TiH2. The phase transformation sequence is described as a number of consecutive reactions corresponding to desorption peaks. The process is compared to non-equilibrium decomposition of commercial TiH2. The mechanical pre-treatment with additives significantly eases and accelerates decomposition of TiH2 to alpha Ti(H), but hinders the stage of alpha Ti( H) -> alpha Ti transformation. Only a small portion of pure alpha Ti was detected for as-milled TiH2 and TiH2/B powders after the final TPD. No alpha Ti was formed in the case of as-milled TiH2/C. (C) 2011 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.jallcom.2011.01.048"],["dc.identifier.isi","000295695500053"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22093"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.publisher.place","Lausanne"],["dc.relation.conference","12th International Symposium on Metal-Hydrogen Systems, Fundamentals and Applications (MH2010)"],["dc.relation.eventend","2010-07-23"],["dc.relation.eventlocation","Moscow, Russia"],["dc.relation.eventstart","2010-07-19"],["dc.relation.issn","0925-8388"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Effect of mechanically induced modification on TiH2 thermal stability"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]