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	PREPARATION OF FE-TI COMPOSITES BY BALL MILLING Roupcová, Pavla ; Schneeweiss, Oldřich The similar Ti-Fe powders were prepered from pure precursors as well as from splinters. The difference of structural and phase composition was determined by XRD and Mössbauer spectroscopy. Úplný záznam
	Příprava Fe-Ti kompozitů mletím v kulovém mlýnku Roupcová, Pavla ; Schneeweiss, Oldřich The materials were prepared by mechanical alloying in the ball mill. The first type of sample consists of pure commercial precursors (TiH2 and ferrihydride). The slightly changes of phase composition of the powder were under the detection limit of X-ray powder diffraction. The MS determined the changes from the first step of milling. The second type of sample was prepared from turnings. The reduction of the splinters volume and the mechanical alloying was running simultaneously. The huge crystalline size differences decreased the credibility of computation of phase composition by XRD. MS was able determined phase composition more exactly and in additional to differentiate crystalline and amorphous FeTi phase. Úplný záznam
	Changes of Phase Composition of NaAlH4 Based Complex Hydrides Roupcová, Pavla ; Schneeweiss, Oldřich The Mössbauer study is target to valence of Fe-doped phase and its changes during preparation by mixing with NaAlH4 and charging and discharging cycles. The 2 mol % FeCl2·4H2O powder was contained in the asmixing material. The dry milled sample did not transformed during the milling in the protective atmosphere. The significant change was approved in the firstly hydrogenation step only. The analysis shows FeClO which released the most significant component in the dehydrogenation and hydrogenation steps. The amount of FeClO was decreased with the all following step of hydrogenation and dehydrogenation. The fine paramagnetic particles of iron oxides were detected and their amount increased influenced of gas impurities. The longer period of heat treatment shows the agglomeration of iron oxides and their magnetic effect. Úplný záznam

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