Electrochemical behavior of sintered YAG dispersed 316L stainless steel composites
By Balaji, S. & Upadhyaya, A.
Published in Materials Chemistry and Physics
NULL
2007
Abstract
The present work investigates the effect of second phase dispersoid addition and sintering temperature on the corrosion behavior of austenitic (316L) stainless steels. Yttrium aluminum garnet (YAG) was added as second phase to the austenitic stainless steels in varying amounts (1, 2.5 and 7.5 wt.%), and the compacts were sintered at 1200 and 1400 °C corresponding to solid-state and supersolidus sintering, respectively. The sintered samples were characterized for their corrosion resistance in 0.1N H2SO4 using potentiodynamic polarization. It is shown that YAG addition does not appreciably increase corrosion rate of 316L compacts. However, as compared to solid-state sintering, supersolidus sintering resulted in superior corrosion resistance. The electrochemical behavior of the 316L–YAG composites with sintering temperature is correlated to the densification response and microstructure.
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