TY - JOUR
T1 - Synthesis of non-equilibrium phases in immiscible metals mechanically mixed by high pressure torsion
AU - Miyazaki, Tatsuya
AU - Terada, Daisuke
AU - Miyajima, Yoji
AU - Suryanarayana, Challapalli
AU - Murao, Reiko
AU - Yokoyama, Yoshihiko
AU - Sugiyama, Kazumasa
AU - Umemoto, Minoru
AU - Todaka, Yoshikazu
AU - Tsuji, Nobuhiro
N1 - Funding Information:
Acknowledgement This study was financially supported by the Grant-in-Aid for Exploratory Research (contract No. 21656188) as well as that for Innovative Area, ‘‘Bulk Nanostructured Metals’’ (contract No. 2201) through MEXT, Japan.
PY - 2011/6
Y1 - 2011/6
N2 - The structural changes in mechanically mixed metals of immiscible combinations of elements caused by bulk mechanical alloying (MA) through the use of high pressure torsion (HPT) were investigated in Ag-Ni and Nb-Zr systems. There was no alloying between Ag and Ni on atomic scale even after 100 rotations of HPT. On the other hand, the β-Zr phase started to appear after HPT 2 rotations in the Nb-Zr system, even though β-Zr is a high temperature phase. Further, Nb and Zr were completely mixed to form a bcc structured single phase after HPT 100 rotations. The sequence of alloying in the Nb-Zr system during HPT was discussed. These results clearly suggest that non-equilibrium phases can form in the Nb-Zr system by bulk MA by the use of HPT.
AB - The structural changes in mechanically mixed metals of immiscible combinations of elements caused by bulk mechanical alloying (MA) through the use of high pressure torsion (HPT) were investigated in Ag-Ni and Nb-Zr systems. There was no alloying between Ag and Ni on atomic scale even after 100 rotations of HPT. On the other hand, the β-Zr phase started to appear after HPT 2 rotations in the Nb-Zr system, even though β-Zr is a high temperature phase. Further, Nb and Zr were completely mixed to form a bcc structured single phase after HPT 100 rotations. The sequence of alloying in the Nb-Zr system during HPT was discussed. These results clearly suggest that non-equilibrium phases can form in the Nb-Zr system by bulk MA by the use of HPT.
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U2 - 10.1007/s10853-010-5240-7
DO - 10.1007/s10853-010-5240-7
M3 - Article
AN - SCOPUS:79953773689
SN - 0022-2461
VL - 46
SP - 4296
EP - 4301
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 12
ER -