Compositional homogeneity in a medical-grade stainless steel sintered with a Mn-Si additive
Author
Salahinejad, E.
Hadianfard, M.J.
Ghaffari, M.
Mashhadi, S.B.
Okyay, Ali Kemal
Date
2012-06-09Source Title
Materials Science and Engineering C
Print ISSN
0928-4931
Publisher
Elsevier
Volume
32
Issue
8
Pages
2215 - 2219
Language
English
Type
ArticleItem Usage Stats
144
views
views
106
downloads
downloads
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.
Keywords
Electron microscopyEnergy 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