Study of the influence of ionic modification of composite ceramics on resistance to high-temperature degradation and thermal shock tests

Abstract

The paper presents the results of studies of the effect of ion modification of near-surface layers of ceramics based on zinc titanate on high-temperature corrosion processes and thermal shock effects simulating critical situations when using this type of ceramics as anode materials for solid oxide fuel cells. The creation of a modified layer in ceramics was carried out by irradiation with O+ ions with different fluences, the variation of which caused different degrees of structural damage created as a result of the interaction of incident ions with the crystalline structure of the near-surface layer with a thickness of about 13 – 13.5 μm. During the thermal stability tests carried out on ceramic samples, involving long-term exposure to high temperatures, it was found that the creation of a modified layer through ion irradiation allows for increased resistance to corrosion and degradation processes, as well as a reduction in the degree of destruction of the strength properties of the near-surface layer of ceramics. It was determined that the optimal conditions for modification are ion irradiation with fluences of 10¹² - 5×10¹² ion/cm², at which the degree of structural changes created in the near-surface layer makes it possible to minimize the negative effect associated with thermally induced corrosion and degradation processes.