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Titolo:
Electrodeposition and structure of Ni-W-B amorphous alloy
Autore:
Cao, GM; Yang, FZ; Huang, L; Niu, ZJ; Xu, SK; Zhou, SM;
Indirizzi:
Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Inst Phys Chem, Xiamen 361005, Peoples R China Xiamen Univ Xiamen Peoples R China 361005 Xiamen 361005, Peoples R China
Titolo Testata:
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING
, volume: 79, anno: 2001,
parte:, 2
pagine: 81 - 84
SICI:
0020-2967(200103)79:<81:EASONA>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
NICKEL-TUNGSTEN ALLOYS; CHROMIUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Yang, FZ Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Inst Phys Chem, Xiamen 361005, Peoples R China Xiamen Univ Xiamen Peoples R China 361005 1005, Peoples R China
Citazione:
G.M. Cao et al., "Electrodeposition and structure of Ni-W-B amorphous alloy", T I MET FIN, 79, 2001, pp. 81-84

Abstract

The electrodeposition of Ni-W-B alloy and the composition, structure and microhardness of the deposits were studied by means of electrochemical techniques. XPS, DSC and XRD. The results showed that Ni-W-B alloy electrodeposit has a lower electrochemical activity compared with Ni-W alloy. Ni-W-B allow electrodeposition was accompanied by th electroless deposition of Ni andincorporation of Na2B4O7 in the deposit. The composition of Ni-W-B alloy deposit was not remarkably affected by changes of sodium tungstate concentration and the maximum electrodeposition current efficiency was 49.9% in the electrolyte solution with [W]/[W]+[Ni] mole ratio at 0.65. The Ni-W allow obtained was present in a nanocrystalline structure, Ni-W-B was amorphous. Treatment at 400 degreesC for 2 hours caused coarsening of grain size, phaseevolution for the Ni-W-B alloy and increase of microhardnesses.

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Documento generato il 01/04/20 alle ore 17:03:45