Processing and mechanical properties of network ceramic/steel composites by pressureless infiltration
来源期刊：中南大学学报(英文版)2014年第7期
论文作者：杨少锋 CHEN Wei-ping(陈维平) WANG Zai-you(王再友) CAI Yun-jie(蔡云杰)
文章页码：2560 - 2566
Key words：network ceramic; steel composite; bending strength; fretting wear
Abstract: 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.
YANG Shao-feng(杨少锋)1, CHEN Wei-ping(陈维平)2, WANG Zai-you(王再友)1, CAI Yun-jie(蔡云杰)1
(1. School of Material Engineering, Nanjing Institute of Technology, Nanjing 211167, China;
2. National Engineering Research Center of Near-net-shape Forming for Metallic Materials,
South China University of Technology, Guangzhou 510640, China)
Abstract: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.
Key words:network ceramic; steel composite; bending strength; fretting wear
