Effect of Activating Substance on Microstructure and Infiltration Behavior of ZTA/High Chromium Cast Iron Composites
Author of the article:WANG Wenlong;LIU Haiyun;WANG Xiaojie;JIA Dengyun;CHEN Shaoping
Author's Workplace：School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China
Key Words：composites coated layer pressureless infiltration
Abstract：B4C and Cr powders were coated on the surface of ZTA particles and pressed into preforms.ZTA/high chromium cast iron matrix composites were prepared by non-pressure infiltration method under the protection of argon.The microstructure,element distribution and phase composition of the composite were analyzed by SEM,EDS and XRD.The results show that adding B4C powder and Cr powder in the preforms could realize the infiltration of high chromium cast iron liquid into the preforms.During the infiltration process,B4C would react to form new phases such as ZrB2,Fe2B,C,B2O3,etc.Among them,ZrB2 and iron liquid have better wetting property and could play a role in promoting infiltration as a transition material.Cr element promotes infiltration by reducing the surface tension of high chromium molten cast iron.
