Sintering behavior of Lanthana-bearing nanostructured ferritic steel consolidated via spark plasma sintering

Pasebani, Somayeh; Charit, Indrajit; Butt, Darryl P.; Cole, James I.; Wu, Yaqiao; Burns, Jatuporn

doi:10.1002/adem.201500294

Title: Sintering behavior of Lanthana-bearing nanostructured ferritic steel consolidated via spark plasma sintering

Journal Article · Mon Aug 03 00:00:00 EDT 2015 · Advanced Engineering Materials

DOI:https://doi.org/10.1002/adem.201500294· OSTI ID:1294356

Pasebani, Somayeh ^[1]; Charit, Indrajit ^[1]; Butt, Darryl P. ^[1]; Cole, James I. ^[1]; Wu, Yaqiao ^[2]; Burns, Jatuporn ^[2]

Univ. of Idaho, Moscow, ID (United States); Center for Advanced Energy Studies (CAES), Idaho Falls, ID (United States)
Boise State Univ., Boise, ID (United States); Center for Advanced Energy Studies (CAES), Idaho Falls, ID (United States)

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 studied. 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. As a result, 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.

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Research Organization:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC07-05ID14517

OSTI ID:: 1294356

Report Number(s):: INL/JOU-13-30950

Journal Information:: Advanced Engineering Materials, Vol. 18, Issue 2; ISSN 1438-1656

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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