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Дата издания
31.12.2024Область исследования
Тип исследования
Аннотация (краткое описание)
This article presents the results of the mechanisms of composite ZrO2-Al2O3ceramics atthe addition of a stabilizing V2O5dopant, a change in the concentration of which results in in grain size enlargement, porosity reduction, and the formation of a substitution Zr(V)O2phase in the structure at dopant concentrations greater than 0.10 M. During the conducted studies it was established that the addition of the V2O5dopant to the composition of composite ZrO2-Al2O3ceramics leads to the enlargement of the ZrO2grains in the Al2O3matrix. Moreover, the enlargement of the ZrO2grains results in porosity reduc-tion, as well as a change in the grains from a spherical shape to an irregular diamond shape, which is analloy of smaller grains, the fusion of which is caused by the thermal effect during the melting of the V2O5oxide. Moreover, if the concentration of the stabilizing V2O5dopant in the composition of ceramics grows by more than 0.1 M, this leads to the formation of a finely dis-persed fraction of V2O5with an orthorhombic type of crystal lattice in the structure, the weight contribution of which is within 4-9% depending on the stabilizing dopant concentration. The formation of the partial substitution phase of Zr(V)O2observed at concentrations of the V2O5dopant in the composition of ceramics above 0.1 M is due to the effects of thermal melting of vana-dium oxide, which results in the initialization of grain coarsening processes due to sintering, as well as partial substitution of zirconium ions by vanadium ions in the composition of the monoclinic phase.DOI
https://doi.org/10.51301/ejsu.2024.i6.04Тип публикаций
Данный документ располагается в коллекциях
Научные издания SU
Engineering Journal of Satbayev University