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Titolo:
Corrosion characteristics of EB-PVD Ti/TiN multi-layer film coated Sm-Co and Fe-Nd-B magnets
Autore:
Choe, HC; Ko, YM; Hwang, KY;
Indirizzi:
Kwang Yang Coll, Dept Met Engn & Ind, Acad Govt Collaborat Res Inst, Chonnam 545800, South Korea Kwang Yang Coll Chonnam South Korea 545800 , Chonnam 545800, South Korea Chosun Univ, Coll Dent, Dept Dent Mat, Kwangju 501759, South Korea Chosun Univ Kwangju South Korea 501759 Mat, Kwangju 501759, South Korea POSCO, Tech Res Labs, Kwang Yang Res Lab, Chonnam 545090, South Korea POSCO Chonnam South Korea 545090 ng Res Lab, Chonnam 545090, South Korea
Titolo Testata:
JOURNAL OF THE JAPAN INSTITUTE OF METALS
fascicolo: 4, volume: 65, anno: 2001,
pagine: 253 - 261
SICI:
0021-4876(200104)65:4<253:CCOETM>2.0.ZU;2-#
Fonte:
ISI
Lingua:
JPN
Keywords:
magnets; corrosion resistance; coating; TiN; electron beam physical vapor deposition (EB-PVD);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Choe, HC Kwang Yang Coll, Dept Met Engn & Ind, Acad Govt Collaborat Res Inst, Chonnam 545800, South Korea Kwang Yang Coll Chonnam South Korea 545800 545800, South Korea
Citazione:
H.C. Choe et al., "Corrosion characteristics of EB-PVD Ti/TiN multi-layer film coated Sm-Co and Fe-Nd-B magnets", J JPN METAL, 65(4), 2001, pp. 253-261

Abstract

To increase the corrosion resistance of magnetic materials, surfaces of Sm-Co and Nd-Fe-B based magnets were plated with Ti/TiN multi-layer and then electrochemical corrosion tests were performed in 4 kinds of electrolyte solutions (0.9 vol%NaCl, 1 vol% lactic acid, 0.05 vol%HCl and modified Fusayama's artificial saliva). Ti/TiN layer coated on magnet grows into preferreddirection with lamellar structure and its thickness is 3.0 mum. Sm-Co basemagnets coated with Ti/TiN multi-layer have good corrosion resistance in 1% lactic acid. Nd-Fe-B base magnets coated with Ti/TiN multi-layer showed good tendency of corrosion resistance in 0.05 vol%HCl solution. The amount of elements released from both Sm-Co and Nd-Fe-B base magnets coated with Ti/TiN multi-layer were more significantly decreased than that of uncoated one. The mean surface roughness values of both Sm-Co and Nd-Fe-B base magnetscoated with Ti/TiN multi-layer were smaller than that of uncoated one after corrosion test. The decreasing rate of micro-hardness of both Sm-Co and Nd-Fe-B base magnets coated with Ti/TiN multi-layer were lower than that of uncoated one after corrosion test. Magnets coated with Ti/TiN multi-layer produced corrosion product such as TiO2 on the surface and resulted in better corrosion resistance than uncoated one.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 20:49:06