Nanocrystalline alloy hydrides formed by mechanical alloying.

• Autorzy: Jurczyk M. , Nowak M. , Jankowska E. , Gąsiorowski A.
• Konferencja: XVIth Physical Metallurgy and Materials Science Conference on Advanced Materials and Technologies AMT'2001, Gdańsk-Jurata, 16-20 September, 2001
• Języki publikacji: PL

Abstrakty

EN

This article presents the work carried out on nanocrystalline Mg2Ni, LaNi5, ZrV2 and TiFe phases, which were prepared by mechanical alloying (MA) and then annealing. XRD analysis showed that, after -40 h milling the studied alloys have decomposed into amorphous phases. Following annealing in high purity argon, XRD confirmed the formation of ordered materials. These alloys were used as active materials for the negative electrodes of an alkaline, rechargeable nickel-metal hydride (Ni-NHx) batteries. The electrochemical results show the substantial difference between the nanocrystalline and the amorphous powders. For example, in the nanocrystalline TiFe0.5Ni0.5 powders discharging capacities up to 125 mA h g to the -1 (at 40 mA g to the -1discharge current) have been measured. MA process has recently emerged as a novel technique for producing nanostructured alloy powders with interesting electrochemical properties.

Słowa kluczowe

PL

stop nanokrystaliczny; kształtowanie; związek międzymetaliczny; stapianie mechaniczne; stopowanie; wyżarzanie; bateria; elektroda ujemna

EN

nanocrystalline alloy; hydride forming; intermetallics; mechanical alloying; annealing; battery; negative electrode

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Inżynieria Materiałowa
• Rocznik: 2001
• Tom: R. XXII, nr 4
• Strony: 416--418
• Opis fizyczny: Bibliogr. 9 poz., tab., rys.

Twórcy

autor

Jurczyk M.

• Institute of Matenals Science and Engineering, Poznań University of Technology, Poznań, Poland

autor

Nowak M.

• Institute of Matenals Science and Engineering, Poznań University of Technology, Poznań, Poland

autor

Jankowska E.

• Central Laboratory of Batteries and Cells, Poznań Poland

autor

Gąsiorowski A.

• Institute of Matenals Science and Engineering, Poznań University of Technology, Poznań, Poland

• Poznań University of Technology

Bibliografia

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• [2] Zaluski L., Zaluska A., Ström-Olsen J.O.: Nanocrystalline metal hydrides. J. Alloys Comp. 253-254 (1997) 70-79.
• [3] Jurczyk M., Rajewski W.: Nanocrystalline hydrogen storage alloys formed by mechanical alloying, in Interface Controlled Materials (Ed. M. Rühle H. Gleiter) Willey-VCH Verlag Gmbh, 2000. Vol. 9, pp. 304-309.
• [4] Liu F., Suda S.: Hydriding properties of the ternary Mm-based AB 5 alloys modified by surface treatment. J. Alloys Comp. 232 (1996) 204-21 t.
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• [6] Joung C.B., Kim J.H., Lec K.S.: Electrode characteristics of nanostructured TiFe and ZrCr2 type metal hydride prepared by mechanical alloying. NanoStructured Materials 8 (1997) 1093-1104.
• [7] Jurczyk M., Rajewski W., Wójcik G., Majchrzycki W.: Metal hydride electrodes prepared by mechanical alloying of ZrV2-type materials. J. Alloys Comp. 285 (1999) 250-254.
• [8] Gleiter H.: Nanocrystaline materials. Progr. Mater. Sci. 33 (1989) 223-315.
• [9] Majchrzycki W., Jurczyk M.: Electrode characteristic of nanocrystaline (Zr,Ti) (V,Cr,Ni)2.41 compound. J. Power Sources 93 (2001) 77-81.