| abstract |
The invention belongs to the technical field of ceramic materials, and discloses a ceramic with multiple elements and high entropy, and a preparation method and application thereof. The ceramic is prepared by taking oxide of Me1, oxide of Me2, oxide of Me3, oxide of Me4, oxide of Me5 and amorphous boron powder as raw materials, and pressing the raw materials into a green body after ball milling and mixing; placing into a graphite crucible, and vacuum heat treating to obtain (Me1xMe2yMe3zMe4nME5m) B 2 Solid solution powder; and (3) heating the solid solution powder to 1000-1400 ℃ by adopting spark plasma sintering, filling protective atmosphere, and then heating to 1800-2200 ℃ for calcining to obtain the solid solution powder. Relative density of the obtained multi-element high-entropy ceramic>95%, a hardness of 25-35 GPa, and a fracture toughness of 2-8 MPa.m 1/2 The grain size is 0.1-1.1 μm, and the weight change rate after heat treatment at 1000-1500 ℃ is 0.3-1%. |