The Influence of Interstitial Impurities on Temperature Ranges of Deuterium Retention in Austenitic Stainless Steel 18Cr10NiTi

摘要

The influence of nitrogen, oxygen and helium on the temperature range of deuterium retention in 18Cr10NiTi stainless steel (of AISI304L type) has been investigated. It is demonstrated that the introduction of oxygen, nitrogen or helium into 18Cr10NiTi steel extends the temperature range of deuterium retention up in temperature. It has been found that for 18Cr10NiTi stainless steel, pre-irradiated with helium ions, the increase in the temperature range of deuterium retention occurs in steps: on attainment of helium concentration of ～0.5 at.% He the temperature range increases by ～150 K, and on attainment of helium concentration of ～2.5 at.% He the temperature range increases by ～200 K. The introduction of oxygen into 18Cr10NiTi stainless steel results in the increase of the temperature range of deuterium desorption in the direction of rise in temperature. In the deuterium thermodesorption spectrum, this manifests itself by the occurrence of an additional low-amplitude peak with the maximum temperature T_N～ 560 K. The introduction of nitric impurity into 18Cr10NiTi stainless steel results in the extension of the temperature range of deuterium retention towards higher temperatures.