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Sintering Behavior of Lanthana-Bearing Nanostructured Ferritic Steel Consolidated via Spark Plasma Sintering
Advanced Engineering Materials
  • Somayeh Pasebani, University of Idaho
  • Indrajit Charit, University of Idaho
  • Darryl P. Butt, Boise State University
  • James I. Cole, Idaho National Laboratory
  • Yaqiao Wu, Boise State University
  • Jatuporn Burns, Boise State University
Document Type
Article
Publication Date
2-1-2016
Abstract
Elemental powder mixture of Fe-14Cr-1Ti-0.3Mo-0.5La2O3 (wt%) composition is mechanically alloyed for different milling durations (5, 10 and 20 h) and subsequently consolidated via spark plasma sintering under vacuum at 950°C for 7 min. The effects of milling time on the densification behavior and density/microhardness are studies. The sintering activation energy is found to be close to that of grain boundary diffusion. The bimodal grain structure created in the milled and sintered material is found to be a result of milling and not of sintering alone. The oxide particle diameter varies between 2 and 70 nm. Faceted precipitates smaller than 10 nm in diameter are found to be mostly La-Ti-Cr-enriched complex oxides that restrict further recrystallization and related phenomena.
Citation Information
Somayeh Pasebani, Indrajit Charit, Darryl P. Butt, James I. Cole, et al.. "Sintering Behavior of Lanthana-Bearing Nanostructured Ferritic Steel Consolidated via Spark Plasma Sintering" Advanced Engineering Materials (2016)
Available at: http://works.bepress.com/yaqiao_wu/21/