Processes of Disperse-Phase Nanostructuring in Subsurface Areas of Composite Ceramic Materials - the Current State of Research (a Brief Review)

摘要

Ceramic structural materials are considered as a perspective base for constructional units of gas turbines, hydrogen engines, and some other heat-resistant applications since such materials are able to meet hard functional requirements. However, limitations typical for ceramics due to the nature of the material (fragility, high sensitivity to shock load, etc.) are the basic problem restricting wide application of such materials. Nanostructuring of ceramic constructional materials is considered as being the most promising approach to solve this problem. This paper summarizes recent works describing micro and nano-structuring processes in nanoceramics, both for "micro" level (CVD and infiltration) and "nano" level (molecular layering - ALD). The positive effect of micro- and nanostructuring on the critical ceramic materials properties (tensile strength, fracture toughness, etc.) is highlighted; the advantages of ALD method for the direct regulation for "nano-non-homogeneities" (3D nanoparticles, 1D nanowires) are discussed.