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Direct Electrochemical Preparation of Ni-Cr Alloy from Solid Oxides in Molten CaCl2
Liu, Zheng-wei1,2,3; Zhang, Hong-ling1,2; Pei, Li-li1,2; Shi, Yi-lang4; Cai, Zai-hua4; Xu, Hong-bin1,2; Zhang, Yi1,2
2017
Source PublicationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
Volume164Issue:4Pages:D237-D243
Abstract

Direct electro-reduction of mixed powders of chromium oxide (Cr2O3) and nickel oxide (NiO) to the intermetallic compound Cr1.12Ni2.88 was successfully demonstrated in CaCl2 molten salt at 900 degrees C. The reduction mechanism was investigated by cyclic voltammetry using a metallic cavity electrode (MCE) as well as the characterizations of some partially electrolyzed products and Ni-Cr alloy prepared from constant voltage electrolysis by terminating the reduction process after different times, which were characterized by means of XRD and SEM et al. It was found that the reduction starts with the formation of Ni metal, accompanied with the formation of an intermediate product CaCr2O4. Then, the intermediate product CaCr2O4 is further electro-reduced to Cr, which is directly alloyed with the newly-formed Ni to form the Ni-Cr intermetallic compound. At the same time, pure Cr phase could not be detected by the XRD or EDXA when the Cr content is relatively low in the NiO-Cr2O3 mixture. Intermetallic compound with the target stoichiometry containing 6000 ppm oxygen is obtained after 4 h electro-reduction in CaCl2 molten salt at 900 degrees C. (C) 2017 The Electrochemical Society. All rights reserved.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1149/2.1361704jes
Indexed BySCI
Language英语
WOS KeywordCalcium-chloride ; Chromium Powder ; Electrolytic Reduction ; Precursors ; Salts ; Films ; Deoxidation ; System
WOS Research AreaElectrochemistry ; Materials Science
WOS SubjectElectrochemistry ; Materials Science, Coatings & Films
Funding OrganizationNational Basic Research Program (973 Program) of China(2013CB632600) ; National Natural Science Foundation of China(21376251 ; Project Fund of Hubei Zhenhua Chemical Co. LTD. ; 21406233)
WOS IDWOS:000400958600107
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22540
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Hubei Zhenhua Chem Co LTD, Huangshi 435001, Hubei Province, Peoples R China
Recommended Citation
GB/T 7714
Liu, Zheng-wei,Zhang, Hong-ling,Pei, Li-li,et al. Direct Electrochemical Preparation of Ni-Cr Alloy from Solid Oxides in Molten CaCl2[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2017,164(4):D237-D243.
APA Liu, Zheng-wei.,Zhang, Hong-ling.,Pei, Li-li.,Shi, Yi-lang.,Cai, Zai-hua.,...&Zhang, Yi.(2017).Direct Electrochemical Preparation of Ni-Cr Alloy from Solid Oxides in Molten CaCl2.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,164(4),D237-D243.
MLA Liu, Zheng-wei,et al."Direct Electrochemical Preparation of Ni-Cr Alloy from Solid Oxides in Molten CaCl2".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 164.4(2017):D237-D243.
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