The Kinetic Effects of Different Rare-earth Additives on the Oxidation Resistance of Ni<sub>80</sub>Cr<sub>20</sub> Alloy

Du Yuansheng; Lin Qin; Ye Wen; Hu Jun

doi:10.13374/j.issn1001-053x.1991.03.030

Volume 13 Issue 3

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Du Yuansheng, Lin Qin, Ye Wen, Hu Jun. The Kinetic Effects of Different Rare-earth Additives on the Oxidation Resistance of Ni80Cr20 Alloy[J]. Chinese Journal of Engineering, 1991, 13(3): 267-272. doi: 10.13374/j.issn1001-053x.1991.03.030

Citation:

Du Yuansheng, Lin Qin, Ye Wen, Hu Jun. The Kinetic Effects of Different Rare-earth Additives on the Oxidation Resistance of Ni₈₀Cr₂₀ Alloy[J]. Chinese Journal of Engineering, 1991, 13(3): 267-272. doi: 10.13374/j.issn1001-053x.1991.03.030

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The Kinetic Effects of Different Rare-earth Additives on the Oxidation Resistance of Ni₈₀Cr₂₀ Alloy

doi: 10.13374/j.issn1001-053x.1991.03.030

Department of Physical Chemistry

Received Date: 1990-08-16
Available Online: 2021-10-26

Abstract

Abstract

The kinetic effects of different rare-earth additives on the oxidation resistance of Ni₈₀Cr₂₀ electrical heating alloy at high temperature are studied through thermogravimetry under the condition that the residual content of rare-earth is fixed. The apparent activation energies and the rate constants of oxidation reaction are calculated in the range of 1 050-1 200℃. The mechanism of oxidation is discussed. The structure, composition, and the adhesion of the oxide films are investigated by X-ray, metallograph etc. The mechanism of the oxidation resistance of Ni₈₀Cr₂₀ alloys with different rare-earth additives is also discussed.
- rare-earth,
- electrical heating alloy,
- oxidation resistance