Effect of mechanical activation on the sintering of transition nanoscaled alumina | Zendy

J. Bossert | Zendy; Emilija Fidančevska | Zendy

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Effect of mechanical activation on the sintering of transition nanoscaled alumina

Author(s) -

J. Bossert,

Emilija Fidančevska

Publication year - 2007

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos0702117b

Subject(s) - sintering , materials science , microstructure , consolidation (business) , grain size , phase (matter) , metallurgy , composite material , chemistry , business , accounting , organic chemistry

Consolidation of transition nanoscaled alumina (γ, δ, θ, and α-phase) at P=500 MPa and T=1500°C, gave compacts with density of 70%TD and a vermicular structure. After mechanical activation by attriting, the transformation rate of γ-Al2O3→ δ-Al2O3 → θ-Al2O3 → α-Al2O3 was reduced from 1126 to 1079oC. The density of the sintered compacts at 1500oC was 96%TD. The α-Al2O3 microstructure exhibited a grain size distribution from 100 to 900 nm

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