Premartensitic states in the Ti50Ni50-x57Fex alloys studied by the annihilation of positrons

被引：0

作者：

Baturin, AA ^{[1
]}

Lotkov, AI ^{[1
]}

Anokhin, SV ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Strength Phys & Mat Sci, Siberian Div, Tomsk 634021, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2000年 / 89卷 / 05期

关键词：

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The spectra of the angular correlation of annihilation photons (ACAP) for the (Ti50Ni50-xFex)-Fe-57 alloys with x = 0, 1.0, and 2.5 at. % Fe-57 were studied as a function of Fe-57 concentration and temperature at the stage preceding the B2 --> R martensitic transformation. Changes in the positron behavior caused by introduction of impurity Fe-57 atoms into the TiNi matrix are analyzed. It is shown that the qualitative reversible changes in the ACAP spectra at T-0 similar to 413 K cannot be attributed to the changes in the concentration of vacancy-type defect, but rather reflect changes in the electron band structure near the impurity atoms of Fe-57. Comparison with the Mossbauer experimental data obtained on the same alloys is carried out.

引用

页码：495 / 500

页数：6

共 21 条

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[10] LOTKOV AI, 1908, P INT C PHYS TRANS 2, P226

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