ZrSi-Ti3SiC2-based high-toughness composite ceramic as well as preparation method and application thereof: Fid-Bau Portal

ZrSi-Ti3SiC2-based high-toughness composite ceramic as well as preparation method and application thereof

WEI BOXIN / LIANG LANQING / BAI WENLONG / FANG WENBIN

The invention discloses high-toughness composite ceramic based on ZrSi-Ti3SiC2 as well as a preparation method and application of the high-toughness composite ceramic. The invention belongs to the field of multiphase ceramic materials. The invention aims to solve the technical problem that the existing titanium carbide-silicon carbide composite ceramic cannot give consideration to sinterability and excellent fracture toughness at the same time. The composite ceramic is composed of a TiCx phase, a SiC phase, a (Zr, Ti) Cx solid solution phase, a ZrSi phase and a Ti3SiC2 phase. The method comprises the following steps: step 1, mixing TiC powder, Si powder and ZrC powder to obtain mixed powder, adding absolute ethyl alcohol for ultrasonic treatment, and then ball-milling, mixing, drying and sieving under the protection of inert gas to obtain ceramic powder; 2, the ceramic powder is subjected to hot pressed sintering, and the high-toughness composite ceramic based on ZrSi-Ti3SiC2 is obtained. The ZrSi-Ti3SiC2-based high-toughness composite ceramic disclosed by the invention is used for preparing cutters, molds and aerospace materials.

一种基于ZrSi‑Ti3SiC2的高韧性复合陶瓷及其制备方法和应用。本发明属于复相陶瓷材料领域。本发明的目的是为了解决现有碳化钛‑碳化硅复合陶瓷无法兼顾烧结性和优异断裂韧性的技术问题。本发明的复合陶瓷由TiCx相、SiC相、(Zr,Ti)Cx固溶相ZrSi相、Ti3SiC2相组成。本发明的方法：步骤1：将TiC粉、Si粉和ZrC粉混合，得到混合粉体，加入无水乙醇超声处理，然后在惰性气体保护下球磨混料，烘干，过筛，得到陶瓷粉；步骤2：将陶瓷粉进行热压烧结，得到基于ZrSi‑Ti3SiC2的高韧性复合陶瓷。本发明的一种基于ZrSi‑Ti3SiC2的高韧性复合陶瓷用于制备刀具、模具和航空航天材料。

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