Lattice properties of supersaturated Ni–Sn solid solutions
Lattice properties of supersaturated Ni–Sn solid solutions
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DOI：
10.1016/j.matlet.2015.07.030
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发表时间：
2015-12
影响因子：
3
通讯作者：
Liu Li;Wei-li Wang;L. Hu;Y. Ruan;B. Wei
中科院分区：
文献类型：
--
作者：
Liu Li;Wei-li Wang;L. Hu;Y. Ruan;B. Wei
在220-280 K过冷度范围内，通过快速凝固获得了Sn固溶度高达9.2at%的Ni-Sn过饱和固溶体。从实验和理论上研究了该材料的晶格常数、微观晶格畸变、热膨胀和线膨胀系数等晶格性质。Sn含量每增加1 at%，晶格常数线性增加约0.01 Ω.晶格畸变主要集中在第一近邻原子，畸变率为（3.5±0.3）%，较远原子的畸变率小于1%.热膨胀系数随Sn含量变化不大，铸态固溶体在1150 K以上由于Ni 3Sn化合物的相变而明显增加，而退火过饱和样品的热膨胀系数随温度平稳增加。
Supersaturated Ni–Sn solid solutions with Sn solubility up to 9.2 at% have been obtained through rapid solidification in the undercooling range of 220–280 K. The lattice properties including the lattice constant, microscopic lattice distortion, thermal expansion and linear expansion coefficient are investigated experimentally and theoretically. The lattice constants increase about 0.01 Å per 1 at% Sn in linear way. The lattice distortions are mainly confined to the first nearest-neighbor atoms with the values of (3.5±0.3)%, and are less than 1% for farther atoms. The thermal expansions vary only a little with Sn content and exhibit obvious increase for the as-cast solid solutions above 1150 K due to the phase transformation of Ni3Sn compound, whereas they increase smoothly with temperature for the annealed supersaturated samples.