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论文类型：期刊论文

发表时间：2022-06-30

发表刊物：稀有金属材料与工程

所属单位：物理学院

卷号：38

期号：8

页面范围：1348-1352

ISSN号：1002-185X

摘要：Surface irradiation for refractory Ni-based alloy DZ4 was realized by high intensity pulsed ion beam (HIPIB) containing C(n+) (30 mol%) and H(+) (70 mol%), with pulse duration of 70 ns and current density of 100 A/cm(2), under the accelerating voltage of 250 kV; while the treating pulses were chosen as 5, 10 and 15 times. The surface microstructure changes before and after irradiation was analyzed by TEM. Results show that compared with the original sample, a polycrystal layer appeared on the topmost surface of the sample, no matter what times it was irradiated; the layer was composed of Ni, Cr, Al, Ti, W, Mo and Co elemental crystal with grain size of 5 similar to 10 nm. gamma' phase did not exist below the polycrystal layer in certain depth, but its content increased gradually as the depth increasing.

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