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EFFECT OF HYDROGEN–THERMAL TREATMENT OF ALUMINUM NITRIDE AND SILICON NITRIDE POWDERS ON MECHANICAL PROPERTIES OF CERAMICS

I.Morozov,
 
† V.Skorokhod,
 
R.Morozova,
 
O.Bezdorozhev
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2017, #07/08
http://www.materials.kiev.ua/article/2405

Abstract

The effect of hydrogen–thermal treatment on the chemical composition and morphology of aluminum nitride and silicon nitride powders for producing ceramics with enhanced operation properties is investigated. It is shown that the hydrogen–thermal treatment leads to decrease in the content of impurity elements, loosening of aggregates of powder particles and, as a consequence, activation in compacting. The produced ceramics have enhanced mechanical properties, contrary to the samples produced of nitride powders with no hydrogen treatment


ALUMINUM NITRIDE, HYDROGEN, HYDROGEN–THERMAL TREATMENT, IMPURITY, MECHANICAL PROPERTIES, SILICON CARBIDE, SINTERING

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