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题名: Synthesis and Compression Property of Oxidation-Resistant Ni-Al Foams
作者: Zeng, Wen-Wen;  Hou, Si-Han;  Ding, Xiao-Jun;  Duan, De-Li;  Li, Shu;  Zhang, Shi-Hong
发表日期: 2017-10-1
摘要: Three different Ni-Al foams were synthesized by vapor aluminizing with control of aluminizing time. Oxidation tests under 1100 degrees C and compression tests were conducted to evaluate the oxidation resistance and compression properties of the foams. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) tests were carried out to study the phase composition and microstructure of Ni-Al foams before and after oxidation. Results showed that vapor aluminizing process did not change the foam macro-and microstructure, and the phase composition became from beta/gamma'-phase to single beta-phase as the aluminizing time extending. The Ni-Al foams possessed excellent oxidation resistance, and decreased Al content increased oxidation weight gain and altered oxidation products. Foams containing single beta-phase presented obvious brittleness under compression tests, but the foam with beta/gamma'-phase exhibited elasticity and toughness to a certain extent. The elasticity and toughness of the foams significantly can be improved after oxidation because of the phase changing in matrix during oxidation, and the pre-oxidized high-Al-content Ni-Al foams exhibited good compression properties, as well as excellent oxidation resistance.
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Recommended Citation:
Zeng, Wen-Wen,Hou, Si-Han,Ding, Xiao-Jun,et al. Synthesis And Compression Property Of Oxidation-resistant Ni-al Foams[J]. Chinese Acad Sciences, Inst Metal Research,2017,30(10):965-972.

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