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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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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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This current study has been supported by the Department of Science and Technology, Government of India, through Nano Mission program (Project No: SR/S5/NM/-07/2007).

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India

    Karthikeyan Rajan (Master’s Student), Vadlamani Subramanya Sarma (Associate Professor) & B. S. Murty (Professor)

  2. Institute for Applied Materials, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany

    Thangaraju Shanmugasundaram (Post-Doctoral Fellow)

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  1. Karthikeyan Rajan
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  2. Thangaraju Shanmugasundaram
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  3. Vadlamani Subramanya Sarma
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Correspondence to Vadlamani Subramanya Sarma.

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Manuscript submitted February 28, 2013.

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Rajan, K., Shanmugasundaram, T., Subramanya Sarma, V. et al. Effect of Y2O3 on Spark Plasma Sintering Kinetics of Nanocrystalline 9Cr-1Mo Ferritic Oxide Dispersion-Strengthened Steels. Metall Mater Trans A 44, 4037–4041 (2013). https://doi.org/10.1007/s11661-013-1845-1

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