Compositional homogeneity in a medical-grade stainless steel sintered with a Mn-Si additive

Date

2012-06-09

Authors

Salahinejad, E.
Hadianfard, M.J.
Ghaffari, M.
Mashhadi, S.B.
Okyay, Ali Kemal

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Abstract

In this paper, chemical composition uniformity in amorphous/ nanocrystallization medical-grade stainless steel (ASTM ID: F2581) sintered with a Mn-Si additive was studied via scanning electron microscopy, energy dispersive X-ray spectroscopy, and transmission electron microscopy. The results show that as a result of sintering at 1000 °C, no dissociation of Mn-Si additive particles embedded in the stainless steel matrix occurs. In contrast, sintering at 1050 °C develops a relatively homogeneous microstructure from the chemical composition viewpoint. The aforementioned phenomena are explained by liquation of the Mn-Si eutectic additive, thereby wetting of the main powder particles, penetrating into the particle contacts and pore zones via capillary forces, and providing a path of high diffusivity.

Source Title

Materials Science and Engineering C

Publisher

Elsevier

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Keywords

Electron microscopy, Energy dispersive X-ray spectroscopy, Local chemical composition, Medical-grade stainless steel, Sintering, Capillary force, Chemical compositions, Compositional homogeneity, Energy dispersive X ray spectroscopy, Homogeneous microstructure, NO dissociation, Particle contacts, Powder particles, Amorphous silicon, Electron microscopy, Manganese, Scanning electron microscopy, Silicon, Transmission electron microscopy, X ray spectroscopy, Sintering

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Citation

Published Version (Please cite this version)

Language

English

Type

Article