ZTA陶瓷/高铬铸铁复合材料浸渗组织及机理  

Mechanism and Microstructure of ZTA/High Chromium Cast Iron Composites Prepared by Pressureless Infiltration

作　　者：任强[1] 刘海云[1,2] 梁朝[1] 陈少平[1,2] 郭俊杰[1,2] 孟庆森[1,2] 

机构地区：[1]太原理工大学材料科学与工程学院 [2]太原理工大学新材料界面科学与工程教育部重点实验室

出　　处：《特种铸造及有色合金》2017年第5期538-541,共4页Special Casting & Nonferrous Alloys

摘　　要：以高铬铸铁为金属基体,添加Ti粉的ZTA陶瓷颗粒为增强体,采用无压浸渗方法制备了ZTA陶瓷/高铬铸铁复合材料。采用SEM、EDS、XRD等试验方法分析了该复合材料的成分分布和组织结构。结果表明,高铬铸铁熔体能够浸渗到Ti含量为5%的ZTA预制体中,并在复合材料中均匀分布;预制体中的Ti颗粒与合金中的Cr元素对浸渗有促进作用;高铬铸铁合金与陶瓷结合界面处存在FeAl_2O_4、FeTiO_5和AlCrO_3相。A ceramic/cast iron composites of ZTA/high chromium cast iron was fabricated successfully by pressureless infiltration with high chromium cast iron on the ZTA preform with 5%Ti particles.The microstructure,element composition and phase constituent of the composites were investigated by scanning electron microscopy（SEM）equipped with energy X-ray dispersive spectroscopy（EDS）system and Xray diffraction（XRD）.The results show that high chromium cast iron can be spontaneously infiltrated into the ZTA preform with 5%Ti particles and homogeneously distributed in the composites.Ti particles in the ZTA preform and Cr elements in the alloy promote jointly role for pressureless infiltration process.Moreover,the interfacial reactions occur between the alloy and the preform,and the reactive products are FeAl2O4 intermetallic and FeTiO5、AlCrO3 solid solution.

关 键 词：ZTA陶瓷预制体 高铬铸铁 无压浸渗 Ti颗粒 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ174.1[化学工程—陶瓷工业]