Sintering and mechanical properties of oxide-oxide composite based on ZrO2-MgO mixtures

A. S. Buyakov, S. P. Buyakova, D. A. Tkachev, S. N. Kulkov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Porous ceramics ZrO2-MgO with a 50 vol. % pore volume and bimodal pore size distribution were studied. The samples were produced by cold uniaxial pressing followed by sintering at temperature of 1600°C and a holding time from 10 min to 10 hours. Bimodal pore structure was obtained by adding of ultrahigh molecular weight polyethylene pore-forming particles with average size 50 μm to the initial powder mixtures. The pore volume for all samples was constant - 50±3 vol. %. With increasing of sintering holding time the average size of the macropores decreased and the micropores increased. The coherent diffraction domains average size of components increases with increasing of MgO concentration and the time of the sintering, while the microdistortions of crystal lattice decrease. With an increase of the sintering holding time more than 5 hours, an insufficient stabilization of cubic ZrO2 takes place for the low MgO concentrations. The dependences of the tensile strength and the Young's modulus on the microstresses in the ceramic composite structure are investigated. Estimation of the microstresses on the basis of X-ray diffraction analysis has shown that the tensile strength mainly determined by microstresses and its increasing leads to a strength decrease.

Original languageEnglish
Title of host publicationProceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures
EditorsVasily M. Fomin, Victor E. Panin, Sergey G. Psakhie
PublisherAmerican Institute of Physics Inc.
Volume2051
ISBN (Electronic)9780735417779
DOIs
Publication statusPublished - 12 Dec 2018
EventInternational Symposium on Hierarchical Materials: Development and Applications for New Technologies and Reliable Structures 2018 - Tomsk, Russian Federation
Duration: 1 Oct 20185 Oct 2018

Conference

ConferenceInternational Symposium on Hierarchical Materials: Development and Applications for New Technologies and Reliable Structures 2018
CountryRussian Federation
CityTomsk
Period1.10.185.10.18

Fingerprint

sintering
mechanical properties
porosity
composite materials
oxides
tensile strength
ceramics
composite structures
pressing
diffraction
crystal lattices
polyethylenes
low concentrations
molecular weight
modulus of elasticity
stabilization
x rays
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Buyakov, A. S., Buyakova, S. P., Tkachev, D. A., & Kulkov, S. N. (2018). Sintering and mechanical properties of oxide-oxide composite based on ZrO2-MgO mixtures. In V. M. Fomin, V. E. Panin, & S. G. Psakhie (Eds.), Proceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures (Vol. 2051). [020046] American Institute of Physics Inc.. https://doi.org/10.1063/1.5083289

Sintering and mechanical properties of oxide-oxide composite based on ZrO2-MgO mixtures. / Buyakov, A. S.; Buyakova, S. P.; Tkachev, D. A.; Kulkov, S. N.

Proceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures. ed. / Vasily M. Fomin; Victor E. Panin; Sergey G. Psakhie. Vol. 2051 American Institute of Physics Inc., 2018. 020046.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Buyakov, AS, Buyakova, SP, Tkachev, DA & Kulkov, SN 2018, Sintering and mechanical properties of oxide-oxide composite based on ZrO2-MgO mixtures. in VM Fomin, VE Panin & SG Psakhie (eds), Proceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures. vol. 2051, 020046, American Institute of Physics Inc., International Symposium on Hierarchical Materials: Development and Applications for New Technologies and Reliable Structures 2018, Tomsk, Russian Federation, 1.10.18. https://doi.org/10.1063/1.5083289
Buyakov AS, Buyakova SP, Tkachev DA, Kulkov SN. Sintering and mechanical properties of oxide-oxide composite based on ZrO2-MgO mixtures. In Fomin VM, Panin VE, Psakhie SG, editors, Proceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures. Vol. 2051. American Institute of Physics Inc. 2018. 020046 https://doi.org/10.1063/1.5083289
Buyakov, A. S. ; Buyakova, S. P. ; Tkachev, D. A. ; Kulkov, S. N. / Sintering and mechanical properties of oxide-oxide composite based on ZrO2-MgO mixtures. Proceedings of the Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures. editor / Vasily M. Fomin ; Victor E. Panin ; Sergey G. Psakhie. Vol. 2051 American Institute of Physics Inc., 2018.
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AB - Porous ceramics ZrO2-MgO with a 50 vol. % pore volume and bimodal pore size distribution were studied. The samples were produced by cold uniaxial pressing followed by sintering at temperature of 1600°C and a holding time from 10 min to 10 hours. Bimodal pore structure was obtained by adding of ultrahigh molecular weight polyethylene pore-forming particles with average size 50 μm to the initial powder mixtures. The pore volume for all samples was constant - 50±3 vol. %. With increasing of sintering holding time the average size of the macropores decreased and the micropores increased. The coherent diffraction domains average size of components increases with increasing of MgO concentration and the time of the sintering, while the microdistortions of crystal lattice decrease. With an increase of the sintering holding time more than 5 hours, an insufficient stabilization of cubic ZrO2 takes place for the low MgO concentrations. The dependences of the tensile strength and the Young's modulus on the microstresses in the ceramic composite structure are investigated. Estimation of the microstresses on the basis of X-ray diffraction analysis has shown that the tensile strength mainly determined by microstresses and its increasing leads to a strength decrease.

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