Metastable solidification in undercooled liquid droplets of Fe-Ni based soft-magnetic alloys under terrestrial and microgravity conditions
Metastable solidification in undercooled liquid droplets of Fe-Ni based soft-magnetic alloys under terrestrial and microgravity conditions
复制标题
陆地和微重力条件下铁镍基软磁合金过冷液滴的亚稳态凝固
DOI：
10.1088/1742-6596/327/1/012005
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Volkmann
中科院分区：
文献类型：
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作者：
W. Löser;T.G. Woodcock;O. Shuleshova;R. Hermann;H.-G. Lindenkreuz;B. Gehrmann;
S. Schneider;T. Volkmann
利用地面实验和微重力条件下的电磁悬浮技术研究了Fe-Ni基软磁合金过冷熔体的显微组织演变和亚稳相形成。在不同熔体过冷度下淬火的商业软磁合金样品中观察到不连续的组织变化ΔT。结果在枝晶破裂模型的框架内得到了成功的解释。在含镍量较高的商用软磁合金中未发现亚稳相的形成。在微重力条件下，Fe - 90ni - 10形成的亚稳bcc相超过临界熔体过冷时的寿命增加。微重力下悬浮液滴的表面张力是通过高速视频记录的液滴振荡来确定的。所得值σ= 1.90±0.01 Nm−1，与文献值吻合较好。
Microstructure evolution and metastable phase formation in undercooled melts of Fe-Ni based soft magnetic alloys were studied by the electromagnetic levitation technique in ground-based experiments and under microgravity during parabolic flight campaigns. Discontinuous changes in the microstructure were observed in samples of a commercial soft magnetic alloy quenched at distinct melt undercooling ΔT. The results were successfully interpreted within the framework of the dendrite breakup model. No metastable phase formation was detected in commercial soft magnetic alloys which possess higher Ni contents. Under microgravity conditions the lifetime of the metastable bcc phase formed for Fe 90 Ni 10 beyond a critical melt undercooling increases. The surface tension of the levitating droplets under microgravity was determined from high speed video recordings of the oscillations of the droplets. The value obtained, σ= 1.90±0.01 Nm− 1, agrees well with values from the literature.
内部对流对亚稳相过冷 Fe-Cr-Ni 合金寿命的影响
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
Alaina B. Hanlon;D. Matson;R. Hyers
通讯作者：
R. Hyers
过冷 Fe-Cr-Ni 熔体中的成核和相选择：第二部分。
DOI：
10.1007/s11661-997-0147-x
发表时间：
1997
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
T. Volkmann;D. Herlach;W. Löser
通讯作者：
W. Löser