Evolution of Structural Changes in Nanocrystalline Alloys with Temperature

0086820 - ÚFM 2008 RIV RU eng, rus J - Journal Article
Miglierini, M. - Kaňuch, T. - Pavúk, M. - Jirásková, Yvonna - Zbořil, R. - Mašláň, M. - Švec, P.
Evolution of Structural Changes in Nanocrystalline Alloys with Temperature.
[Strukturní změny v nanokrystalických slitinách vyvolané teplotou.]
Physics of Metals and Metallography. Roč. 104, č. 4 (2007), s. 335-345. ISSN 0031-918X. E-ISSN 1555-6190
R&D Projects: GA ČR GA202/05/2111
Institutional research plan: CEZ:AV0Z20410507
Keywords : Mőssbauer spectroscopy * Nanocrystallization * NANOPERM
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.455, year: 2007

Structural features of the NANOPERM-type alloys Fe91–x Mo8Cu1Bx with x=12, 15, and 17 have been investigated by Mössbauer spectroscopy and by X-ray diffraction in all the samples. Partially crystallized samples have been prepared by controlled annealing of the original precursors for one hour at temperatures ranging from 330 to 650°C in a vacuum. The temperature of the onset of crystallization has been determined to be of 430, 450, and 470°C for x=12, 15, and 17, respectively. During the first step of crystallization, bcc-Fe(Mo) nanosized grains are formed. Surface features of the samples investigated have also been characterized using atomic force microscopy.

Strukturní vlastnosti materiálu typu NANOPERM Fe91-xMo8Cu1Bx pro x=12, 15, a17 jsou studovány pomocí Mössbauerovy spektroskopie a rentgenové difrakce v původním stavu a po teplotním zpracování v rozsahu teplot 330°C až 650 °C. Po prvním stupni krystalizace je pozorován vznik bcc-Fe(Mo) nanokrystalů. Povrchové vlastnosti vzorků jsou sledovány take pomocí mikroskopie atomárních sil.
Permanent Link: http://hdl.handle.net/11104/0148976