Prefabricated Optimization Of Zirconia Corundum / High Chromium Cast Iron Based Honeycomb Ceramic Composites

At present, the metal-based composite material reinforced by ceramic has been widespread concerned as a hot spot of wear-resistant materials field. However, interfacial bonding problem cannot be solved as influencing the composite properties. This paper focused on the issues of the interface bonding between metal substrate and ceramic, which included the preparation of ceramic preform, reactive infiltration casting modeling process between metal matrix and ceramic preforms, and the analysis of the formation and mechanisms of interfacial bonding.The ceramic particles were added in the ceramic preform and the ceramic powder mass fraction were respectively 2%,4%,6%,8%,10%,12%,14%,16%,18%,20%, 22%,24%,26% 28%. The optimum contents were initially determined to2%,4%,6%, 8% via analysis the organization and interfacial bonding of the composite materials after pouring. Then the optimum content of ceramic powder was 2% through a low stress three-body abrasive wear test and the width of the interface.The porosity of the ceramic preform was increased by adding a pore forming agent to the ceramic preform, and a new process of preparing a ceramic preform was explored. In addition, the reactive infiltration casting process model between metal matrix and ceramic preform was established, obtaining good results.The analysis of interface transition layer composites showed that the ceramic coating layer took place complex chemical reactions and the glass phase formed at high temperatures. And the glass phase not only had a good compatibility with the sintering glass phase, but also could react with the metallic solution and elements, which acted as the connection effect. The bonding problem between metal matrix and ceramic powder was improved via the glass phase formed by a series of complex reactions, and the bonding mechanism was explained at some views. Based on the previous studies, it was indicated that the associative key between ceramic and metal matrix preforms was mainly metallurgical bonding, and secondary mechanical bonding. The wetting problem and crack problem due to different thermal expansion coefficient between metal matrix and ceramic powder were solved.