Densification of Shock-Treated Aluminum Nitride and Aluminum Oxide

MRS Proceedings ◽

10.1557/proc-24-281 ◽

1983 ◽

Vol 24 ◽

Cited By ~ 2

Author(s):

E. K. Beauchamp ◽

R. A. Graham ◽

M. J. Carr

Keyword(s):

Aluminum Nitride ◽

Aluminum Oxide ◽

Hot Pressing ◽

Shock Treatment ◽

Oxide Powders ◽

Rapid Sintering

ABSTRACTThe structures of aluminum nitride and aluminum oxide powders have been modified by explosive shock treatment at pressures from 4 to 27 GPa. Shockinduced dislocations in AlN were apparently responsible for enhancement in hot pressing behavior. In Al2O3 an increase 3 to 4 times in densification rates after shocking resulted-from rapid sintering of aggregates in the powder.

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Retention of nanostructure in aluminum oxide by very rapid sintering at 1150 °C

Journal of Materials Research ◽

10.1557/jmr.1995.0237 ◽

1995 ◽

Vol 10 (2) ◽

pp. 237-239 ◽

Cited By ~ 79

Author(s):

Subhash H. Risbud ◽

Chien-Hua Shan ◽

Amiya K. Mukherjee ◽

Moon J. Kim ◽

J.S. Bow ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Aluminum Oxide ◽

Resistance Heating ◽

Sintering Process ◽

Oxide Powders ◽

Transmission Electron ◽

Rapid Sintering ◽

Electron Energy Loss ◽

Plasma Activated Sintering

Aluminum oxide powders doped with MgO (300 to 500 nm) were sintered to almost theoretical density within just 10–15 min at 1150 °C using a plasma-activated sintering process based on charging the loosely filled powders with an electric discharge prior to densification by resistance heating. The microstructure of the consolidated disks was examined by high resolution transmission electron microscopy (HREM) and electron energy loss spectroscopy (EELS) and revealed excellent grain to grain contact with virtually no grain growth and structurally clean grain boundaries.

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INFLUENCE OF MORPHOLOGY, PHASE COMPOSITION AND CONTENT OF ALUMINUM OXIDE PARTICLES ON RHEOLOGICAL PROPERTIES OF AQUEOUS SUSPENSIONS BASED ON THEM

Aviation Materials and Technologies ◽

10.18577/2713-0193-2021-0-4-14-25 ◽

2021 ◽

pp. 14-25

Author(s):

V.A. Voronov ◽

◽

A.S. Chainikova ◽

Yu.E. Lebedeva ◽

D.M. Tkalenko ◽

...

Keyword(s):

Phase Composition ◽

Aluminum Oxide ◽

Aggregate Stability ◽

Plasma Chemical ◽

Buffer Solution ◽

Sedimentation Stability ◽

Aqueous Suspensions ◽

Oxide Powders ◽

Ceramic Samples ◽

Oxide Particles

This work investigated the chemical and phase composition of aluminum oxide powders obtained by various methods (alkoxide, codeposition, thermal and plasma-chemical). The physicomechanical, thermophysical and thermal properties of ceramic samples based on them have been determined. The effect of the nature of the aluminum oxide powder and the production process parameters on the sedimentation stability of aqueous suspensions based on them has been determined. The influence of the content of particles of aluminum oxide, buffer solution and rheological additives on the viscosity, sedimentation and aggregate stability of aqueous suspensions has been determined.

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