Effect of N, C and B interstitial atoms on local bonding structure in mechanically activated TiH(2)/h- BN, TiH(2)/C, and TiH(2)/B mixtures

Mechanically activated TiH(2)/h-BN, TiH(2)/C and TiH(2)/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....

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Published inJournal of alloys and compounds Vol. 483; no. 1-2; pp. 309 - 312
Main Authors Morozova, O S, Khomenko, T I, Borchers, Ch, Leonov, A V, Kurmaev, E Z, Moewes, A
Format Journal Article
LanguageEnglish
Published 01.08.2009
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Summary:Mechanically activated TiH(2)/h-BN, TiH(2)/C and TiH(2)/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 TiH(2) due to contact of TiH(2) 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 TiH(2). The effect is most pronounced when boron is the additive.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0925-8388
DOI:10.1016/j.jallcom.2008.08.093