Bonding mechanism of X10CrNi18-8 with Ni/Al_2O_3 composite ceramic by pressureless infiltration |
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| Authors: | YANG Shao-feng CHEN Wei-ping HAN Meng-yan YANG Chao ZHU De-zhi National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of Technology Guangzhou China |
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| Affiliation: | YANG Shao-feng,CHEN Wei-ping,HAN Meng-yan,YANG Chao,ZHU De-zhi National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510640,China |
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| Abstract: | An alloy steel/alumina composite was successfully fabricated by pressureless infiltration of X10CrNi18-8 steel melt on 30% (mass fraction) Ni-containing alumina based composite ceramic (Ni/Al2O3) at 1 600 °C. The infiltration quality and interfacial bonding behavior were investigated by SEM, EDS, XRD and tensile tests. The results show that there is an obvious interfacial reaction layer between the alloying steel and the Ni/Al2O3 composite ceramic. The interfacial reactive products are (Fe x Al y )3O4 intermetallic phase and (Al x Cr y )2O3 solid solution. The interfacial bonding strength is as high as about 67.5 MPa. The bonding mechanism of X10CrNi18-8 steel with the composite ceramic is that Ni inside the ceramic bodies dissolves into the alloy melt and transforms into liquid channels, consequently inducing the steel melt infiltrating and filling in the pores and the liquid channels. Moreover, the metallurgical bonding and interfacial reactive bonding also play a key role on the stability of the bonding interface. |
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| Keywords: | pressureless infiltration steel/alumina composites interface bonding infiltration mechanism |
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