Molten salt electrodeposition of Ni aluminide surface layer and high temperature oxidation resistance

被引：14

作者：

Fukumoto, M ^{[1
]}

Hara, M ^{[1
]}

Sato, Y ^{[1
]}

Kidachi, T ^{[1
]}

Nagataki, T ^{[1
]}

机构：

[1] Akita Univ, Dept Mat Sci & Engn, Fac Engn & Resource Sci, Akita 0108502, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS | 2002年 / 66卷 / 07期

关键词：

electrodeposition; high temperature oxidation; molten salt; nickel aluminide; aluminium;

D O I：

10.2320/jinstmet1952.66.7_684

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A Ni aluminide layer on Ni substrate was formed by electrodepositing Al and alloying it with Ni in molten salt. Electrolysis of Al was conducted using potentiostatic polarization method at constant potentials in an equimolar NaCl-KCl melt containing 1similar to5 mol%AIF(3) at 1023 K. The mass of electrodeposited material increased with an increase in polarization potential. Deposits formed at -1.2similar to-1.4 V (vs. Ag/Ag+ (0.1)) built up a homogeneous layer. These deposits consisted of Ni aluminide such as Ni2Al3 and NiAl. Al content in deposit layers slightly decreased with increasing depth from the surface to the deposit/substrate interface. Nickel covered by the electrodeposit layer was more resistant than bare nickel to high temperature oxidation.

引用

页码：684 / 689

页数：6

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