Electrical Resistivity Study of Lattice Defects Introduced in Zone Refined-Iron by Deformation at -196℃

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Recovery of zone refined iron deformed at -196℃ was studied over the temperature range from -196° to 280℃ by the measurements of electrical resistivity. The concentration of carbon and nitrogen contained in the iron was not more than 1ppm. Eight stages of recovery were observed in the temperature range from -196° to 80℃. Three of them were predominant; the first stage is below -180℃ with the activation energy of 0.15eV and the order of reaction γ of 1.9, the second one around -160℃ with the activation energy 0.2〜0.3eV and γ of 4.2, and the third one around 50℃ with the activation energy of 1.2eV and γ of 3.1〜3.4. Then a continuous recovery followed above 80℃. It is concluded that the stage below -180℃ was caused by the annihilation of di-interstitials and the stage around -160℃ by the migration of single interstitials to dislocations. The stage around 50℃ seems to be caused not only by interstitial impurities but also by deformation-produced defects, probably vacancies.
社団法人日本物理学会の論文
1967-04-05