Effect of Sn Content on the Pore Structures of Porous Ni-Sn Alloys Produced by Reactive Synthesis Sintering Method
Effect of Sn Content on the Pore Structures of Porous Ni-Sn Alloys Produced by Reactive Synthesis Sintering Method
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DOI：
10.1007/s11665-022-07088-6
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发表时间：
2022-07
影响因子：
2.3
通讯作者：
Xide Li;Yiquan Fan;Yuzuo Liu;Jili Liu;Junsheng Yang;Yan Zhu;Jiang-Guo Li;Binglong Liu
中科院分区：
文献类型：
--
作者：
Xide Li;Yiquan Fan;Yuzuo Liu;Jili Liu;Junsheng Yang;Yan Zhu;Jiang-Guo Li;Binglong Liu
本文采用低温活化反应烧结法制备多孔Ni-Sn合金。采用X射线衍射仪（XRD）、游标卡尺、孔径仪和扫描电镜（SEM）对烧结样品的相组成、体积膨胀率、孔结构和孔形貌进行了研究。结果表明，相组成与锡含量、孔径和孔隙率有关。多孔Ni-Sn合金的体积膨胀率随Sn含量的增加先减小后增大。对于含50 wt.% Sn含量的变化，主要相为Ni_3Sn和Ni_3Sn_2。测得的平均孔径为2.78μm，其导致45.01%的开孔率和47.51%的总孔隙率。同时，测得膨胀率为-0.99%，渗透率为105.1 m3 m-2kpa-1h-1。Ni-Sn合金的高孔隙率归因于绿色压坯中的互连孔隙和由于Ni和Sn原子扩散速率的差异而引起的Kirkendall效应。
The objective of this work is to prepare porous Ni-Sn alloys by low temperature activation reaction sintering method. The phase composition, volume expansion ratio, pore structures and pore morphology of the sintered samples were studied by x-ray diffraction (XRD), vernier caliper measurement, aperture tester, and scanning electron microscopy (SEM). The results indicate that the phase composition is related to Sn content, pore size and porosity. The volume expansion rate of porous Ni-Sn alloys decreases first and then increases with the Sn amount. For Ni-Sn alloy with 50 wt.% of Sn content, the main phases are found to be Ni3Sn and Ni3Sn2. The average pore size is measured to be 2.78μm, which leads to an open porosity of 45.01% and a total porosity of 47.51%. Meanwhile, the volume expansion rate and permeability are determined to be – 0.99% and 105.1 m3m–2kpa–1h–1, respectively. The high porosity of Ni-Sn alloy is attributed to the interconnected pores in the green compacts and the Kirkendall effect due to the difference in diffusion rates of Ni and Sn atoms.