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|Type:||Artigo de periódico|
|Title:||DIFFUSION PATTERNS OF NITROGEN IN THE FE17ND2 COMPOUND AS A FUNCTION OF TEMPERATURE|
|Abstract:||Nitrogen diffusion patterns were obtained for the compound Fe17Nd2 at temperatures of 400, 500 and 575-degrees-C. The formation of a nitrogen solid solution was not observed, and the fully nitrided phase precipitated from the phase free from nitrogen. At 400-degrees-C the shell-core diffusion structure was not observed, and diffusion occurred preferentially through extended defects such as grain and phase boundaries and dislocations. At higher temperatures, the bulk diffusion coefficient was large enough for bulk diffusion to compete with the faster diffusion through defects, so that the shell-core structure was observed. For all temperatures colour differences were observed in the fully nitrided phase, indicating fluctuations in nitrogen concentration. For higher temperatures, precipitation of NdN was observed.|
|Editor:||Elsevier Science Sa Lausanne|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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