Sintering Behavior of Lanthana-Bearing Nanostructured Ferritic Steel Consolidated via Spark Plasma Sintering

被引：14

作者：

Pasebani, Somayeh ^{[1
,4
]}

Charit, Indrajit ^{[1
,4
]}

Butt, Darryl P. ^{[2
,4
]}

Cole, James I. ^{[3
,4
]}

Wu, Yaqiao ^{[2
,4
]}

Burns, Jatuporn ^{[2
,4
]}

机构：

[1] Univ Idaho, Dept Chem & Mat Engn, Moscow, ID 83844 USA

[2] Boise State Univ, Dept Mat Sci & Engn, Boise, ID 83725 USA

[3] Idaho Natl Lab, Idaho Falls, ID 83401 USA

[4] Ctr Adv Energy Studies, Idaho Falls, ID 83401 USA

来源：

ADVANCED ENGINEERING MATERIALS | 2016年 / 18卷 / 02期

关键词：

MECHANICAL-PROPERTIES; OXIDE PARTICLES; MICROSTRUCTURE; ALLOYS;

D O I：

10.1002/adem.201500294

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Elemental powder mixture of Fe-14Cr-1Ti-0.3Mo-0.5La(2)O(3) (wt%) composition is mechanically alloyed for different milling durations (5, 10 and 20h) and subsequently consolidated via spark plasma sintering under vacuum at 950 degrees C for 7min. 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 70nm. Faceted precipitates smaller than 10nm in diameter are found to be mostly La-Ti-Cr-enriched complex oxides that restrict further recrystallization and related phenomena.

引用

页码：324 / 332

页数：9

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