Electrolytic methods, involving a viscous electrolyte, were used to measure the diffusivity of H at temperatures of between 285 and 328K. The results (table 2) indicated that H diffused via a single-stage process at temperatures of between 285K and the melting point. No departures from Arrhenius behavior, due to trapping effects involving lattice vacancies, were found.

T.Ishikawa, R.B.McLellan: Acta Metallurgica, 1986, 34[6], 1091-5

 

 

 

Table 2

Diffusivity of H in Al

 

Temperature (K)

D (m2/s)

285

7.78 x 10-15

288

1.10 x 10-14

293

1.19 x 10-14

295

1.21 x 10-14

296

1.38 x 10-14

297

4.58 x 10-14

304

3.67 x 10-14

309

2.14 x 10-14

315

8.96 x 10-14

328

1.73 x 10-13