The invention discloses a high-toughness interlocking structure ZrB2 ceramic and a preparation method and application thereof, and belongs to the technical field of zirconium diboride ceramic, and the method comprises the following steps: carrying out pre-oxidation treatment on ZrC powder and SiC powder, mixing and ball-milling with ZrB2 powder, and carrying out direct current assisted two-step sintering to obtain the high-toughness interlocking structure ZrB2 ceramic. The preparation method comprises the following steps: providing a process liquid phase at a high temperature by using pre-oxidized ZrC powder and SiC powder, and meanwhile, applying direct current to induce anisotropic growth of ZrB2 crystal grains and couple the ZrB2 crystal grains into an interlocking structure, thereby obtaining the high-toughness ZrB2 ceramic with the interlocking structure. The process liquid phase and the applied direct current can effectively promote ZrB2 crystal grains to grow into a lamellar shape, and the lamellar crystal grains are coupled to form an interlocking structure, so that not only is the fracture toughness of the ZrB2-based ceramic improved, but also the strength of the ZrB2-based ceramic is improved; a process liquid phase formed at a high temperature is not left in the final ZrB2-based ceramic, so that the high-temperature mechanical property of the ZrB2-based ceramic is improved; the preparation process is simple, short in period, high in efficiency and capable of realizing batch production.
本发明公开了一种高强韧互锁结构ZrB2陶瓷及其制备方法和应用,属于二硼化锆陶瓷技术领域,方法包括:先将ZrC粉末和SiC粉末进行预氧化处理,再与ZrB2粉末混合球磨,经直流电流辅助两步烧结,得到高强韧互锁结构ZrB2陶瓷。利用预氧化的ZrC粉末和SiC粉末在高温下提供过程液相,同时施加直流电流,诱导ZrB2晶粒各向异性生长并耦合成互锁结构,得到高强韧互锁结构ZrB2陶瓷。过程液相和施加的直流电流可有效促进ZrB2晶粒生长成片层状,片层状晶粒耦合形成了互锁结构,不仅提升了ZrB2基陶瓷的断裂韧性,还提升了ZrB2基陶瓷的强度;高温下形成的过程液相不会残留在最终的ZrB2基陶瓷中,提升了ZrB2基陶瓷的高温机械性能;制备工艺简单、周期短、效率高,可批量化生产。
High-toughness ZrB2 ceramic with interlocking structure as well as preparation method and application of high-toughness ZrB2 ceramic
一种高强韧互锁结构ZrB2陶瓷及其制备方法和应用
2025-05-13
Patent
Electronic Resource
Chinese
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