Thermodynamical (TD) fluctuations of temperature in mirrors may produce surface fluctuations not only through thermal expansion in mirror body [1] but also through thermal expansion in mirror coating. We analyze the last " surface " effect which can be larger than the first " volume " one due to larger thermal expansion coefficient of coating material and smaller effective volume. In particular...

Composites with extremal or unusual thermal expansion coefficients are designed using a three-phase topology optimization method. The composites are made of two different material phases and a void phase. The topology optimization method consists in finding the distribution of material phases that optimizes an objective function (e.g. thermoelastic properties) subject to certain constraints, su...

Controlling thermal expansion is an important, not yet resolved, and challenging problem in materials research. A conceptual design is introduced here, for the first time, for the use of metal-organic frameworks (MOFs) as platforms for controlling thermal expansion devices that can operate in the negative, zero, and positive expansion regimes. A detailed computer simulation study, based on mole...

Thermodynamical (TD) fluctuations of temperature in mirrors may produce surface fluctuations not only through thermal expansion in mirror body [1] but also through thermal expansion in mirror coating. We analyze the last " surface " effect which can be larger than the first " volume " one due to larger thermal expansion coefficient of coating material and smaller effective volume. In particular...

Thermodynamical (TD) fluctuations of temperature in mirrors may produce surface fluctuations not only through thermal expansion in mirror body [1] but also through thermal expansion in mirror coating. We analyze the last " surface " effect which can be larger than the first " volume " one due to larger thermal expansion coefficient of coating material and smaller effective volume. In particular...