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Titolo:
Diffusion of hydrogen along the grain boundaries in Ni3Al alloys
Autore:
Cheng, XY; Wan, XJ; Wu, QY; Sun, XK;
Indirizzi:
Shanghai Univ, Mat Res Inst, Shanghai 200072, Peoples R China Shanghai Univ Shanghai Peoples R China 200072 ai 200072, Peoples R China Chinese Acad Sci, Met Res Inst, State Key Lab RSA, Shenyang 110015, Peoples R China Chinese Acad Sci Shenyang Peoples R China 110015 110015, Peoples R China
Titolo Testata:
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
fascicolo: 2, volume: 17, anno: 2001,
pagine: 207 - 210
SICI:
1005-0302(200103)17:2<207:DOHATG>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENVIRONMENTAL EMBRITTLEMENT; NICKEL; TRANSPORT; SEGREGATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
--discip_EC--
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Cheng, XY Shanghai Univ, Mat Res Inst, Shanghai 200072, Peoples R China Shanghai Univ Shanghai Peoples R China 200072 Peoples R China
Citazione:
X.Y. Cheng et al., "Diffusion of hydrogen along the grain boundaries in Ni3Al alloys", J MAT SCI T, 17(2), 2001, pp. 207-210

Abstract

The diffusivity of hydrogen in two Ni3Al alloys (No.1 and No.2) has been measured in the temperature range of 100 degreesC to 420 degreesC using an ultrahigh vacuum gaseous permeation technique. The diffusivity data fall into two segments, in which the hydrogen diffusivity adheres to the Arrhenius form, respectively. From the hydrogen diffusivity, it is conjectured that the hydrogen diffusivity reflects the hydrogen transportation along the grain boundaries at lower temperature and the hydrogen transportation in the lattice at higher temperature. The intergranular fracture of Lit-type intermetallics induced by hydrogen at relative low temperature results from hydrogen transportation along the grain boundaries and not in the lattice.

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Documento generato il 26/09/20 alle ore 14:49:53