Synthesis and Compression Property of Oxidation-Resistant Ni-Al Foams

被引：3

作者：

Zeng, Wen-Wen ^{[1
,2
]}

Hou, Si-Han ^{[2
]}

Ding, Xiao-Jun ^{[2
]}

Duan, De-Li ^{[2
]}

Li, Shu ^{[2
]}

Zhang, Shi-Hong ^{[2
]}

机构：

[1] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2017年 / 30卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Ni-Al foams; Vapor aluminizing; Oxidation; Compression; MECHANICAL-PROPERTIES; NICKEL; MICROSTRUCTURE; BEHAVIOR; PRECIPITATION; TEMPERATURES; DEFORMATION; ALPHA-AL2O3; ALLOYS; METALS;

D O I：

10.1007/s40195-017-0569-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

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.

引用

页码：965 / 972

页数：8

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