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Crystallization of Fe-based amorphous alloys studied in-situ using synchrotron radiation

机译：使用Synchrotron辐射研究Fe的无定形合金的结晶

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We report recent results on the crystallization kinetics of four iron-based amorphous metallic alloys using the instrumentation of the SAXS beamline of the LNLS -National Synchrotron Light Laboratory, Brazil. The evolution of the crystallization products was analyzed in-situ during Joule heating for each investigated alloy. For Fe{sub}78 B{sub}13 Si{sub}9 and Fe{sub}81 B{sub}13.5 Si{sub}3.5 C{sub}2 alloys the crystallization processes start with the formation of large α-Fe and Fe{sub}3B crystalline particles. In the case of Fe{sub}74 B{sub}17 Si{sub}2 Ni{sub}4 Mo{sub}3 and Fe{sub}86 B{sub}6 Zr{sub}7 Cu{sub}1 alloys we observed the initial formation of  250L?Fe nanocrystalline grains, followed by Fe{sub}3B or small amounts of ZrO{sub}2 and B{sub}2Zr. From isochronal differential scanning calorimetry we determined the crystallization activation energy and the Avrami exponent for the main exothermal reaction of each alloy. It was observed that after Joule heating all studied alloys presented a higher ductility when compared to conventional furnace annealed samples.
机译：我们通过LNLS-ational Synchrotron光实验室，巴西的SAXS横梁线仪表报告了四种铁基无定形金属合金的结晶动力学的结果。在焦耳加热期间分析结晶产物的进化，每次研究的合金。对于Fe {sub} 78b {sub} 13 si {sub} 9和fe {sub} 81 b {sub} 13.5 si {sub} 3.5 c {sub} 2合金结晶过程从形成大α-fe和Fe {sub} 3b结晶颗粒。在FE {sub} 74 b {sub} 17 si {sub} 2 ni {sub} 4 mo {sub} 3和fe {sub} 86 b {sub} 6 zr {sub} 7 cu {sub} 1合金我们观察到initial 250L？Fe纳米晶粒的初始形成，然后是Fe {sub} 3b或少量zro {sub} 2和b {sub} 2zr。从等海差示扫描量热法测定结晶活化能量和AVRAMI指数，用于每个合金的主要放热反应。观察到，与常规炉退火样品相比，焦耳加热后，所有所研究的合金均呈现更高的延展性。

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