"[2FF208D21FA7]" . . "Morozova, O. S." . . "Size distributions of nanoscopic holes in Ti/h-BN and Ti/B nanocomposites" . . . . . "Size distributions of nanoscopic holes in Ti/h-BN and Ti/B nanocomposites" . "RIV/00216208:11320/10:10069754" . . "4" . "11320" . "Pundt, A." . "Proch\u00E1zka, Ivan" . "11"^^ . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . "P(KAN300100801), P(MEB100912), Z(MSM0021620834)" . "107" . "287630" . . "2"^^ . . . . . . "Size distributions of nanoscopic holes in Ti/h-BN and Ti/B nanocomposites"@en . . "000275028900025" . . "RIV/00216208:11320/10:10069754!RIV11-MSM-11320___" . . "Positron annihilation spectroscopy (oPs lifetime, coincidence Doppler broadening techniques) was employed for defect studies of %22Ti%22-based nanocomposites prepared by high-energy ball milling. It was found that size of nanoscopic holes is reduced with increasing milling time in H2 /He atmosphere and also probability of Ps formation in holes decreases. At the same time the Ti content in the vicinity of holes increases. A simple explanation of these observations was suggested. The effect of filling the nanoscopic pores with hydrogen is enhanced in TiH2 milled with h-BN or B in He atmosphere. Sufficiently long milling time leads to a similar size distribution of nanoscopic holes in Ti/h-BN and Ti/B, despite the fact that it differs substantially in the initial powders, however, density of nanoscopic holes in Ti/B is significantly lower than in Ti/h-BN" . "Journal of Applied Physics" . "5"^^ . . "\u010C\u00ED\u017Eek, Jakub" . "Size distributions of nanoscopic holes in Ti/h-BN and Ti/B nanocomposites"@en . . "nanocomposites; Ti/B; Ti/h-BN; nanoscopic holes; Size distributions"@en . . "0021-8979" . . "Borchers, C." . . "Positron annihilation spectroscopy (oPs lifetime, coincidence Doppler broadening techniques) was employed for defect studies of %22Ti%22-based nanocomposites prepared by high-energy ball milling. It was found that size of nanoscopic holes is reduced with increasing milling time in H2 /He atmosphere and also probability of Ps formation in holes decreases. At the same time the Ti content in the vicinity of holes increases. A simple explanation of these observations was suggested. The effect of filling the nanoscopic pores with hydrogen is enhanced in TiH2 milled with h-BN or B in He atmosphere. Sufficiently long milling time leads to a similar size distribution of nanoscopic holes in Ti/h-BN and Ti/B, despite the fact that it differs substantially in the initial powders, however, density of nanoscopic holes in Ti/B is significantly lower than in Ti/h-BN"@en .