Effect of Al content on porous Ni-Al alloys

被引：45

作者：

Dong, H. X. ^{[1
]}

He, Y. H. ^{[1
]}

Jiang, Y. ^{[1
]}

Wu, L. ^{[1
]}

Zou, J. ^{[2
]}

Xu, N. P. ^{[3
]}

Huang, B. Y. ^{[1
]}

Liu, C. T. ^{[4
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia

[3] Nanjing Univ Technol, Membrane Sci & Technol Res Ctr, Nanjing 210009, Peoples R China

[4] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 13-14期

基金：

中国国家自然科学基金;

关键词：

Ni-Al intermetallics; Porous material; Mechanical properties; Reactive synthesis; INTERMETALLIC COMPOUND; MECHANICAL-PROPERTIES; PORE-SIZE; MICROSTRUCTURE; FABRICATION; COMBUSTION; DIFFUSION; OXIDATION; BEHAVIOR; PHASE;

D O I：

10.1016/j.msea.2011.02.014

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous Ni-Al alloys with different nominal compositions ranging from Ni-10 wt.% Al to Ni-40 wt.% Al were fabricated through reactive synthesis of Ni and Al elemental powders. It had been found that the volume expansion, maximum pore size and permeability of porous Ni-Al alloys increased with increasing the Al content, indicating that the nature of the pores can be manipulated through changing the Al content. In addition, detailed structural characterizations showed that the fabricated porous Ni-Al alloys can have three crystalline phases (i.e., Ni3Al, NiAl, and Ni2Al3) when using different compositions, in good agreement with the Ni-Al phase diagram. Mechanical strength tests of the fabricated porous Ni-Al alloys were also performed. Both of the bending strength and tensile strength of porous Ni-Al alloys were in the range of 5-80 MPa, and decreased with increasing the Al content. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：4849 / 4855

页数：7

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