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| Investigation on Preparation of Nanoporous Arrays of NiAl-W |
| ZHAO Zhilong1, GAO Jianjun1, WEI Lufeng1, CUI Kai1, HOU Tiecheng2
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1 School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072;
2 Second Design Institution, Northwest Industries Group Co., LTD, Xi’an 710043 |
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Abstract The nanoporous arrays on the surface of NiAl-W eutectic alloy were obtained through a combined process of directional solidification and selective dissolution. The spacing and diameter of rod-like tungsten phases in the NiAl-W pseudobinary eutectic both can be tuned through the selection of growth rates during directional solidification. Thus, the spacing and porous diameter of porous array on the surface of NiAl matrix could be also adjusted after removing rod-like W phase through the electrochemical selective dissolution. Because of the limitation of the pore size, the deepening of the depth of etching porous zone has been suffered an enormous hindrance after etching of 2—3 hours at the potential of 0.5 V.
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Published: 08 May 2018
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2017, Vol. 31 
