Yu. I. Komolikov, L. V. Ermakova, V. D. Zhuravlev, E. I. Senaeva, R. A. Shishkin
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引用次数: 0
Abstract
We have studied the effect of α-Al2O3 powders added as sintering aids (15 wt %) on the hardness and porosity of Al2O3–3YSZ ceramics. The alumina powders were synthesized via combustion of aluminum nitrates or by solution combustion synthesis (SCS) with the use of glycine and urea as organic reducing agents. The use of aggregates of submicron alumina particles that remained intact after SCS was shown to prevent preparation of high-density ceramics. After sintering at 1550°C, the relative density of the ceramics was 75 to 85% on account of considerable closed porosity. The microhardness of the ceramics ranged from 1 to 11.1 MPa and correlated with the variations in their density and porosity. A reference sample, containing pure-grade alumina additions, had the highest relative density, 98%, without closed porosity.
期刊介绍：
Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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