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Effect of Y2O3 on Spark Plasma Sintering Kinetics of Nanocrystalline 9Cr-1Mo Ferritic Oxide Dispersion-Strengthened Steels |
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| Authors: | Karthikeyan Rajan Thangaraju Shanmugasundaram Vadlamani Subramanya Sarma B S Murty |
| Affiliation: | 1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India 2. Institute for Applied Materials, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany |
| Abstract: | Nanocrystalline mechanically alloyed powders of 9Cr-1Mo ferritic steels with and without yttria dispersoids were densified using spark plasma sintering (SPS) to near-theoretical density at a temperature of 1073 K (800 °C). Studies on densification behaviour revealed that steels with dispersoids densified faster when compared to Fe-9Cr-1Mo steel. The evaluation of densification mechanisms during SPS reveals that grain boundary and lattice diffusion to be predominant at relative densities ranging from >0.7 to 0.9 in both the alloys. |
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