NanocompositesNo Access

EFFECTS OF PROCESSING TEMPERATURE AND FABRICATION METHOD ON MICROSTRUCTURE AND DENSITY OF MULTILAYER AL₂O₃-ZRO₂ NANOCOMPOSITES

S. MIRHASHEMI

Malek-Ashtar University of Technology, Tehran, P.O. Box: 14395-553, Iran

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H. R. BAHARVANDI

Malek-Ashtar University of Technology, Tehran, P.O. Box: 14395-553, Iran

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H. ABDIZADEH

School of Metallurgy and Materials Engineering, University of Tehran, Tehran, P.O. Box: 14395-553, Iran

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, and

N. EHSANI

Malek-Ashtar University of Technology, Tehran, P.O. Box: 14395-553, Iran

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https://doi.org/10.1142/S0217979208048188Cited by:2 (Source: Crossref)

Abstract

Relatively low strength and fracture toughness of ceramics have restricted their applications. Various solutions have been studied to overcome the abovementioned drawbacks. One of the most sophisticated and promising solution is production of multilayer ceramic composites. High hardness, heat and wear resistance, low electrical and thermal conductivity, and resistance to chemical attacks are the most important characteristics of Al₂O₃. Therefore, it is a common candidate for various industrial applications. Multilayer alumina-zirconia composites were made using two methods of isostatic and hydraulic compaction of dry ceramic powders. The green articles were conventionally sintered at 1420, 1550 and 1650°C for 3h. The microstructure and density of composites were investigated. The results show that the pressing method and sintering temperature have a relatively moderate effect on the microstructure and density of the sintered samples.

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