Processing and mechanical properties of network ceramic/steel composites by pressureless infiltration  

作　　者：杨少锋 陈维平 王再友 蔡云杰 

机构地区：[1]School of Material Engineering,Nanjing Institute of Technology [2]National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology

出　　处：《Journal of Central South University》2014年第7期2560-2566,共7页中南大学学报（英文版）

基　　金：Project(51271080) supported by the National Natural Science Foundation of China;Project(2012JSSPITP1968) supported by the Innovative Foundation for Students of Jiangsu Province,China;Project(CKJB201204) supported by the Innovation Fund of Nanjing Institute of Technology,China

摘　　要：A new style Ni-containing alumina ceramic foam based continuous three-dimensional interconnected skeleton was prepared by impregnating a polymeric sponge with aqueous ceramic slurry.Subsequently,alumina ceramic foam/steel metal matrix composites(MMCs) were prepared successfully by sand mold casting technique.The microstructure and mechanical properties of MMCs were investigated by SEM,EDS and compressive test.The results show that the depth of infiltration is about 40 μm to the bonding interface of ceramic/steel and the fracture strength σmax and plastic strain limit εp of composite are 520 MPa and 11.2%,respectively.The fretting wear mechanism of MMCs is mainly performed at the oxidative wear mode with lower load/friction frequency and the predominant oxidation wear together with slight adhesive wear and abrasive wear multiple mode with higher load/ friction frequency.Moreover,the infiltration bonding and continuous three-dimensional interconnected ceramic skeleton play a vital role in the stability of the bonding interface and excellent mechanical properties.A new style Ni-containing alumina ceramic foam based continuous three-dimensional interconnected skeleton was prepared by impregnating a polymeric sponge with aqueous ceramic slurry.Subsequently,alumina ceramic foam/steel metal matrix composites（MMCs） were prepared successfully by sand mold casting technique.The microstructure and mechanical properties of MMCs were investigated by SEM,EDS and compressive test.The results show that the depth of infiltration is about 40 μm to the bonding interface of ceramic/steel and the fracture strength σmax and plastic strain limit εp of composite are 520 MPa and 11.2%,respectively.The fretting wear mechanism of MMCs is mainly performed at the oxidative wear mode with lower load/friction frequency and the predominant oxidation wear together with slight adhesive wear and abrasive wear multiple mode with higher load/ friction frequency.Moreover,the infiltration bonding and continuous three-dimensional interconnected ceramic skeleton play a vital role in the stability of the bonding interface and excellent mechanical properties.

关 键 词：network ceramic steel composite bending strength fretting wear 

分 类 号：TB333[一般工业技术—材料科学与工程] TQ174.613[化学工程—陶瓷工业]