Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy

In order to solve the problem of poor oxidation resistance of Cu-Ni-Fe inert anode at high temperature during aluminum electrolysis,Cu-20Ni-19Fe-xAl alloys (x=0%,6%,8%,10%) with different Al contents were prepared by vacuum melting method,and the alloys were used for the high temperature oxidation e...

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Autores principales:	Ying LIU, Zhimin LIANG, Liwei WANG, Zhenzhen PENG, Dianlong WANG
Formato:	article
Lenguaje:	ZH
Publicado:	Hebei University of Science and Technology 2021
Materias:	nonferrous metals and their alloys; cu-ni-fe alloy; microstructure; high temperature oxidation; aluminium electrolysis Technology T
Acceso en línea:	https://doaj.org/article/5cd8f97be96b4cb3ac709a65617ebb27
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spelling	oai:doaj.org-article:5cd8f97be96b4cb3ac709a65617ebb272021-11-23T07:08:47ZEffect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy1008-154210.7535/hbkd.2021yx03012https://doaj.org/article/5cd8f97be96b4cb3ac709a65617ebb272021-06-01T00:00:00Zhttp://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b202103012&flag=1&journal_https://doaj.org/toc/1008-1542In order to solve the problem of poor oxidation resistance of Cu-Ni-Fe inert anode at high temperature during aluminum electrolysis,Cu-20Ni-19Fe-xAl alloys (x=0%,6%,8%,10%) with different Al contents were prepared by vacuum melting method,and the alloys were used for the high temperature oxidation experiments which were carried out at 850 ℃ with oxygen partial pressure of 1.013×105 </sup>Pa and oxidation time of 100 h,and the effects of Al addition on the microstructure and high temperature oxidation properties of the alloy were investigated.The results show that the as-cast Cu-20Ni-19Fe alloy is composed of Ni/Fe-rich dendritic phase (γ1) and Cu/Ni-rich matrix phase (γ2);Al was dissolved in the Cu-20Ni-19Fe alloy matrix with 6% content of Al added;The needle-like or blocky NiAl phase was formed in the microstructure of Cu-20Ni-19Fe alloy with 8% and 10% Al added;The content of NiAl phase increases with the increasing addition of Al;The oxidation kinetics of Cu-20Ni-19Fe alloy follow the straight line under 850 ℃ and oxygen partial pressure of 1.013×105</sup> Pa;After the addition of Al,the oxidation kinetic curve of Cu-20Ni-19Fe-xAl alloy follow an exponential law,and the oxidation rate index of the Cu-20Ni-19Fe-xAl alloy was much smaller with more content of Al.The high-temperature oxidation resistance of Cu-20Ni-19Fe alloy was greatly improved by the addition of Al,which proves the Cu-20Ni-19Fe alloy may be used as an alternative anode material for aluminum electrolysis.Ying LIUZhimin LIANGLiwei WANGZhenzhen PENGDianlong WANGHebei University of Science and Technologyarticlenonferrous metals and their alloys; cu-ni-fe alloy; microstructure; high temperature oxidation; aluminium electrolysisTechnologyTZHJournal of Hebei University of Science and Technology, Vol 42, Iss 3, Pp 296-303 (2021)
institution	DOAJ
collection	DOAJ
language	ZH
topic	nonferrous metals and their alloys; cu-ni-fe alloy; microstructure; high temperature oxidation; aluminium electrolysis Technology T
spellingShingle	nonferrous metals and their alloys; cu-ni-fe alloy; microstructure; high temperature oxidation; aluminium electrolysis Technology T Ying LIU Zhimin LIANG Liwei WANG Zhenzhen PENG Dianlong WANG Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy
description	In order to solve the problem of poor oxidation resistance of Cu-Ni-Fe inert anode at high temperature during aluminum electrolysis,Cu-20Ni-19Fe-xAl alloys (x=0%,6%,8%,10%) with different Al contents were prepared by vacuum melting method,and the alloys were used for the high temperature oxidation experiments which were carried out at 850 ℃ with oxygen partial pressure of 1.013×105 </sup>Pa and oxidation time of 100 h,and the effects of Al addition on the microstructure and high temperature oxidation properties of the alloy were investigated.The results show that the as-cast Cu-20Ni-19Fe alloy is composed of Ni/Fe-rich dendritic phase (γ1) and Cu/Ni-rich matrix phase (γ2);Al was dissolved in the Cu-20Ni-19Fe alloy matrix with 6% content of Al added;The needle-like or blocky NiAl phase was formed in the microstructure of Cu-20Ni-19Fe alloy with 8% and 10% Al added;The content of NiAl phase increases with the increasing addition of Al;The oxidation kinetics of Cu-20Ni-19Fe alloy follow the straight line under 850 ℃ and oxygen partial pressure of 1.013×105</sup> Pa;After the addition of Al,the oxidation kinetic curve of Cu-20Ni-19Fe-xAl alloy follow an exponential law,and the oxidation rate index of the Cu-20Ni-19Fe-xAl alloy was much smaller with more content of Al.The high-temperature oxidation resistance of Cu-20Ni-19Fe alloy was greatly improved by the addition of Al,which proves the Cu-20Ni-19Fe alloy may be used as an alternative anode material for aluminum electrolysis.
format	article
author	Ying LIU Zhimin LIANG Liwei WANG Zhenzhen PENG Dianlong WANG
author_facet	Ying LIU Zhimin LIANG Liwei WANG Zhenzhen PENG Dianlong WANG
author_sort	Ying LIU
title	Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy
title_short	Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy
title_full	Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy
title_fullStr	Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy
title_full_unstemmed	Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy
title_sort	effect of al on the microstructure and high temperature oxidationperformance of cu-20ni-19fe alloy
publisher	Hebei University of Science and Technology
publishDate	2021
url	https://doaj.org/article/5cd8f97be96b4cb3ac709a65617ebb27
work_keys_str_mv	AT yingliu effectofalonthemicrostructureandhightemperatureoxidationperformanceofcu20ni19fealloy AT zhiminliang effectofalonthemicrostructureandhightemperatureoxidationperformanceofcu20ni19fealloy AT liweiwang effectofalonthemicrostructureandhightemperatureoxidationperformanceofcu20ni19fealloy AT zhenzhenpeng effectofalonthemicrostructureandhightemperatureoxidationperformanceofcu20ni19fealloy AT dianlongwang effectofalonthemicrostructureandhightemperatureoxidationperformanceofcu20ni19fealloy
_version_	1718416883320881152

Effect of Al on the microstructure and high temperature oxidationperformance of Cu-20Ni-19Fe alloy

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