Development of sample holder for in situ neutron measurement of hydrogen absorbing alloy

✍ Scribed by Kenji Iwase; Kazuhiro Mori; Yukio Hishinuma; Yoshio Hasegawa; Shuji Iimura; Hiroaki Ishikawa; Takeshi Kamoshida; Toru Ishigaki

• Book ID: 103832903
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 562 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.11.044

✦ Synopsis

We developed a sample holder for in situ measurement of hydrogen absorbing alloy. In order to prevent the hydrogen absorption by vanadium, copper is coated with 2 mm thickness on inner surface of the vanadium holder. The effect of copper coating and the performance of the holder were evaluated by neutron diffraction and PDF profiles. The lattice parameters a and c of La 2 Ni 7 with Ce 2 Ni 7 -type structure were refined as 0.505921(4) and 2.468608(4) nm by Rietveld analysis. The CueCu correlation peak around r ¼ 0.255 nm was not observed in the PDF profile. Thus the holder is useful for in situ measurement of hydrogen absorbing alloy. The diffraction and PDF profiles of La 2 Ni 7 D x (0 < x < 10.5) were collected using a deuterium pressure of 3.7 MPa, and the changes of crystal and local structures were clearly observed.