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Ion beam mixing and phase formation in NiAi multilayers studied by RBS and PAC
Author(s) -
Weber Thomas,
Lieb Klaus Peter,
Uhrmacher Michael
Publication year - 1991
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740170607
Subject(s) - ion , irradiation , rutherford backscattering spectrometry , ion beam mixing , phase (matter) , mixing (physics) , hyperfine structure , analytical chemistry (journal) , nial , atomic physics , chemistry , materials science , ion beam , ion beam deposition , intermetallic , nuclear physics , physics , alloy , organic chemistry , quantum mechanics , chromatography
NiAl bi‐ and multilayers were irradiated with 300–900 keV Xe ions and analysed by Rutherford backscattering spectrometry (RBS) and the perturbed gamma‐ray angular correlation (PAC) method. As PAC measures the interaction of radioactive probe nuclei ( 111 In) with hyperfine fields, it is sensitive to changes in the nearest‐neighbour surrounding induced by a phase transformation. The formation of the crystalline NiAL phase during irradiation was indeed detected by PAC; it was found to start at ion fluences below that required for complete mixing of the constituents. Similar results were obtained after 600 keV Ar irradiations. The interface mixing rate in NiAI bilayers due to 300–600 keV Xe ions was measured with RBS to be k = 4.5(3) ×10 4 Å 4 at room temperature.