Temperature dependence of helium blistering in nickel monocrystals

摘要

The (110) and (111) planes of monocrystalline nickel targets have been bombarded with 500‐keV 4He+ ions under channeling conditions for a total dose of 6×1018 ions/cm2 and for target temperatures ranging from room temperature to 950 °C. The results indicate a decrease in average blister diameter with increase in target temperature. Large‐scale exfoliation of blister skin occurs at 300 °C, and, above 850 °C, holes are observed on the surface.