Research method for interdiffusion and phase change laws of elements of multi-component high-temperature alloy system

The invention relates to a research method for interdiffusion and phase change rules of elements of a multi-component high-temperature alloy system, which comprises the following steps: designing high-temperature alloy components according to the component characteristics of a multi-component high-temperature alloy to be researched, preparing a high-temperature alloy according to the designed components, and carrying out homogenization heat treatment; preparing a diffusion couple from the high-temperature alloy subjected to homogenization heat treatment and pure substances of alloy elements to be subjected to key research, performing diffusion heat treatment, and calculating mutual diffusion parameters of the alloy elements by using a sample subjected to diffusion heat treatment; and performing aging heat treatment on the diffusion couple sample subjected to the diffusion heat treatment, and calculating thermodynamic parameters by using the sample subjected to the aging heat treatment. According to the method