Deformation behavior of zirconia-based porous ceramics

2nd International Conference on Competitive Materials and Technological Processes

Kalatur, E.S.^1 ; Kozlova, A.V.^1 ; Buyakova, S.P.^1 ; Kulkov, S.N.^1

Institute of Strength Physics and Material Science SB RAS, Tomsk State University, Tomsk Polytechnic University, Tomsk, Russia^1

关键词: Average grain size;    Ceramic samples;    Deformation behavior;    Isothermal holding;    Nanocrystallines;    Nonlinear behavior;    Sintering temperature and durations;    Strain stress curve;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/47/1/012004/pdf
DOI  :  10.1088/1757-899X/47/1/012004

来源: IOP

【 摘 要 】

It has been studied a porous ceramics obtained from nanocrystalline ZrO2powders. Samples were obtained by pressing and sintering of compacts, the porosity of ceramic samples was from 20 to 80%. The average grain size in the studied ceramics increased from 0.4 to 4 microns with increasing sintering temperature and duration of isothermal holding from 1400 to 1600 °C and 1 to 5 hours, respectively. It was shown that the «stress-strain» diagrams on the initial stage of deformation has a nonlinear behavior with high parabolic factor of strain-stress curves. It has been shown that fracture of the materials was observed from the elastic area and has a rod-like and cellular-like parts in its structure.