Effect of Al2O3 nanofibers on compaction, phase composition, and mechanical properties of ZrO2-based composites obtained by vacuum pressureless sintering
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Published:2021-02-12
Issue:4(104)
Volume:
Page:132-143
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ISSN:1994-6716
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Container-title:Voprosy Materialovedeniya
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language:
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Short-container-title:Vopr. materialoved.
Author:
Leonov A. A.1, Abdulmenova E. V.2, Kalashnikov M. P.2, Li Jing3
Affiliation:
1. National Research Tomsk Polytechnic University; Institute of High Current Electronics SB RAS 2. National Research Tomsk Polytechnic University; Institute of Strength Physics and Materials Science SB RAS 3. National Research Tomsk Polytechnic University
Abstract
This work studies the effect of the relative content of Al2O3 nanofibers on the compaction, phase composition, and physicomechanical properties of composites based on ZrO2 obtained by free vacuum sintering. It was found that in the process of manufacturing composites, nanofibers are sintered into Al2O3 grains of complex, elongated shape, which form a solid, frame-reinforcing structure. The relative density of composites with 5 wt. % and 10 wt. % of nanofibers, decreases up to 95%. It is shown that in all sintered samples the tetragonal modification of ZrO2 acts as the main phase, and the different content of nanofibers affects the amount of cubic and monoclinic modifications of ZrO2. It was found that addition of 5 wt. % and 10 wt. % of Al2O3 nanofibers increases the microhardness of the composite by 11% and crack resistance by 46%.
Publisher
FSUE CRISM Prometey
Reference25 articles.
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