3 results about "Interphase" patented technology

This invention discloses a method for determining the percolation threshold of particle-type composite materials applicable to hard particles, softened inclusions, and those containing mesophases. The method includes: determining the percolation threshold of hard particle systems based on mesophase thickness reduction; determining the percolation threshold of particle systems containing thick mesophases based on Maxwell homogenization, volume-averaged depolarization factor, and scattering tensor; constructing an interpolation function based on the correlation ratio, considering the correlation effects of short-range repulsive fields and long-range scattering fields; and determining the percolation threshold of non-spherical particle systems with mesophases of arbitrary thickness based on the relative thickness parameter of the mesophase and the constructed interpolation function. This invention overcomes the limitations of existing theoretical techniques, which cannot cover a wide range of non-spherical particle systems and cannot quantify the percolation characteristics of materials under the influence of mesophase evolution. It also overcomes the technical bottlenecks of low efficiency and difficulty in guaranteeing accuracy in numerical simulation, enabling the effective determination of percolation phase transitions in drastically different particle-type composite materials.

This invention relates to the technical field of materials science, and in particular to a multiphase material with a gradient interface phase and its preparation method, comprising a first phase material, a second phase material, and a gradient functional layer located at the interface between the two. The concentration of at least one substance in the gradient functional layer varies continuously or quasi-continuously from the region near the first phase to the region near the second phase. During preparation, a pre-formed layer containing a second-phase precursor and functional filler is first constructed on the surface of the first phase, and then combined with the second phase for molding. Physicochemical reactions allow the substances to penetrate and fuse across the interface, forming a gradient structure in situ. This application can eliminate performance abrupt changes at heterogeneous interfaces, effectively alleviate stress concentration, and suppress delamination failure. Through this design, the interfacial bonding strength and overall mechanical properties of the material are significantly improved, with bending strength increasing by up to 15.4%. It is applicable to various material systems and has strong prospects for industrial application.

The invention discloses an interphase heat exchange coefficient prediction method and device based on bubble form change, and relates to the technical field of nuclear reactor thermotechnical waterpower, and the method comprises the steps: obtaining the physical parameters of bubbles under a target working condition; determining the Weber number and the Morton number of the bubbles according to the physical parameters; the Weber number and the Morton number are input into a preset aspect ratio prediction model, the aspect ratio of the steam bubble is obtained, the aspect ratio prediction model is the aspect ratio, the Weber number and the Morton number, and the constants U1, U2 and U3 are obtained by fitting visual experimental data of the steam-water two-phase system; and on the basis of the physical parameters and the aspect ratio, the interphase heat exchange coefficient of the bubbles is obtained. According to the embodiment of the invention, the relationship between the aspect ratio of the steam bubble and the key dimensionless number is established, so that the heat exchange capacity of the deformed steam bubble is quantitatively evaluated and accurately predicted.