ZHAO Yipeng, LI Hongwei, CHEN Guoqing, FU Xuesong, ZHOU Wenlong

(Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School ofMaterials Science and Engineering, Dalian University of Technology, Dalian 116085, Liaoning, China)

Abstract: (MgCoNiCuZn)O high entropy ceramics were prepared by using injection molding method with commercial oxide powders as the raw materials. Binder removal process was characterized by using thermalgravimetric analyzer. Phase composition and microstructure of the samples were characterized by using XRD, SEM and EDS. Mechanical properties of the sintered samples were also tested. It is demonstrated that dibutyl phthalate, stearic acids/paraffin wax and polyethylene/ polypropylene were degraded successively. The as-sintered samples were of single phase, with crystal structure of rock-salt (Fm-3m (225) space group). Both the particle diffusion rate and densification were rapidly increased at 1050 ℃. The highest relative density and fractured strength of the sintered compacts were 90.47% and 77.98 MPa, respectively. The high-entropy ceramic components can be manufactured by using injection molding technology.

Key words: high entropy ceramics; rock-salt structure; near net shaping process; green manufacturing