Predicting Interdiffusion in High Temperature Coatings |
| |
Authors: | JE Morral |
| |
Institution: | Department of Materials Science and Engineering, Ohio State University, Columbus, Ohio 43210, USA |
| |
Abstract: | Interdiffusion can be a major cause of failure in coated parts that see service at elevated temperatures. Ways to measure the extent of interdiffusion and mathematical equations for predicting these measures are given. The equations are based on the error function solution to the diffusion equation and do not take into account variations of the diffusivity with composition. Also, when the substrate of the coating is multiphase, the equations do not take into account the precipitate morphology, but do take into account that precipitates can act as sinks or sources of solute as the average composition of the substrate varies. The equations are meant to be alloy design tools that indicate how changing substrate or coating chemistry will reduce the extent of interdiffusion. |
| |
Keywords: | interdiffusion high temperature coatings multicomponent diffusion multiphase diffusion coating design |
本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录! |
|