Abstract
Using a proton microbeam PIXE and RBS, a formation of local surface segregations of aluminum in an iron layer has been found, for the first time, at an initial stage of high-dose intensive implantation (from 8×10 16 to ×10 17 cm −2). Using a slow positron beam, a profile of vacancy defects, which depth is comparable to a depth profile of Al ions implanted into iron with 5×10 17 cm −2 has been measured. Complex carbides (Fe 3Al)C and Fe 3C have been found in a near surface layer (TEM measurements) as well as segregations of an ordered phase Fe 3Al (which with a dose increased are partially amorphized). In addition, high dislocation density of 1.2×10 10 cm −2 has been found in the near surface layer, and fields of elastic stresses are formed, which results in the increased friction wear resistance and microhardness.
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