Dense Al[sub 2]O[sub 3]/ZrO[sub 2] particulate composites by free sintering of coated powders

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb05370.x· OSTI ID:7233472

Hu, Ching Li; Rahaman, M N ^[1]

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1. Univ. of Missouri, Rolla, MO (United States). Dept. of Ceramic Engineering

Composite powders, prepared by coating coarse ZrO[sub 2] particles with fine Al[sub 2]O[sub 3] powder using a chemical precipitation technique, were compacted and sintered freely at a constant heating rate of 4 C/min to [approx]1,600 C. Composites containing up to [approx]30 vol% inclusions were sintered to nearly full density under the same conditions used for the unreinforced matrix. Furthermore, the sintering kinetics were not influenced significantly by the inclusion volume fraction. The sinterability of the composites formed from the coated powders was significantly better than that for similar composites formed from mechanically mixed powders. The present data provide a further demonstration that the use of coated powders may have widespread applicability for the fabrication, by free sintering, of dense ceramic particulate composites.

• OSTI ID: 7233472
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:3; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
COMPOSITE MATERIALS
FABRICATION
MATERIALS
OXIDES
OXYGEN COMPOUNDS
SINTERED MATERIALS
SINTERING
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES