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活化物质对ZTA/高铬铸铁复合材料组织结构及浸渗行为的影响
Effect of Activating Substance on Microstructure and Infiltration Behavior of ZTA/High Chromium Cast Iron Composites
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- DOI:
- 作者:
- 王文龙 刘海云 王晓杰 贾登云 陈少平
WANG Wenlong;LIU Haiyun;WANG Xiaojie;JIA Dengyun;CHEN Shaoping
- 作者单位:
- 太原理工大学材料科学与工程学院
School of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China
- 关键词:
- 复合材料 包覆层 无压浸渗
composites coated layer pressureless infiltration
- 摘要:
- 将B4C、Cr粉分别包覆在ZTA颗粒表面,压制成预制体。在氩气保护下,使用无压浸渗法制备了ZTA/高铬铸铁基复合材料。采用SEM、EDS、XRD等方法分析复合材料的组织结构、元素分布以及物相组成。结果表明预制体中添加B4C粉和Cr粉可实现高铬铸铁液对预制体的浸渗,在浸渗过程中B4C会反应生成ZrB2、Fe2B、C、B2O3等新相,其中ZrB2与铁液的润湿性较好,作为过渡物质可起到促进浸渗的作用;Cr则是通过降低高铬铸铁液的表面张力来促进浸渗。
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.