High Pressure High Temperature Consolidation of ZrC Based Ceramic Composites
Zirconium carbide(ZrC)is of special interest for ultrahigh temperature applications because of its high melting point,solid-state phase stability,good thermomechanical and thermochemical properties.High hardness and wear resistance of ZrC,high emissivity,and high current capacity at elevated temperatures make them attractive candidates for cutting tools,thermophotovoltaic radiators and field emitter tips.In addition,a lower density as compared to other carbides makes it a suitable component for re-entry vehicles,rocket/SCRAM jet engines or supersonic vehicles,in which low densities and high temperature load-bearing capabilities are crucial requirements.However,it is of nowadays importance to develop ZrC as a matrix for ceramic-matrix composites with chemically compatible constituents to improve high temperature hardness,sinterability and fracture toughness.In the present work,the systems of ZrC-20wt.%TiC,ZrC-20wt.%Mo2C and ZrC-20wt.%VC were studied.ZrC with introduced second phase was densified using HPHT SPS(high pressure,high temperature spark plasma sintering)technique aimed at propelling the potential of HPHT SPS technique for the complete densification of zirconium carbide based composites.The influence of TiC,Mo2C and VC reinforcing particles on the consolidation process of ZrC based composites was investigated.The measurements of densities of the consolidated samples showed that all the prepared samples possess density near to theoretical one.The comparison of the mechanical properties of the composites emphasizes the privilege of titanium carbide against molybdenum and tungsten carbides.The highest microhardness and Young modulus values were achieved for ZrC-20wt.%TiC system.
High pressure high temperature spark plasma sintering Zirconium carbide based composites High density Vickers microhardness Young modulus
Minasyan Tatevik Aydinyan Sofiya Liu Le Cygan S(l)awomir Hussainova Irina
Tallinn University of Technology,Ehitajate 5,19180 Tallinn,Estonia Institute of Advanced Manufacturing Technology,Wroc(l)awska 37,30-011 Kraków,Poland
国际会议
北京
英文
515-518
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）