Method for preparing titanium subgroup carbonitride solid solution composite ceramic material by sintering: Fid-Bau Portal

Method for preparing titanium subgroup carbonitride solid solution composite ceramic material by sintering

WEI BOXIN / LIANG LANQING / LI XUEWEN / FANG WENBIN

The invention relates to a method for preparing a titanium subgroup carbonitride solid solution composite ceramic material by sintering. The invention belongs to the field of multiphase ceramic materials. The invention aims to solve the technical problems of poor sinterability and fracture toughness of the existing multiphase ceramic. The method comprises the following steps: step 1, mixing titanium subgroup carbide powder and titanium subgroup carbonitride powder or adding titanium subgroup carbonitride powder, ball-milling, mixing and sieving to obtain mixed powder; and step 2, carrying out spark plasma sintering or hot pressed sintering on the mixed powder obtained in the step 1 to obtain the titanium subgroup carbonitride solid solution composite ceramic material. According to the preparation method disclosed by the invention, elements in the same family are mutually used as sintering aids according to solid solution characteristics, so that the phase boundary can be enriched, the sintering performance of the titanium subfamily ceramic is improved, and the solid solution strengthening effect is achieved. Besides, after the titanium subgroup hydride is added, heat preservation is carried out in the initial stage in the sintering process, vacancy is introduced, and the density is remarkably improved.

一种烧结法制备钛副族碳氮化物固溶体复相陶瓷材料的方法。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复相陶瓷的烧结性和断裂韧性差的技术问题。方法：步骤1：将钛副族碳化物粉体和钛副族碳氮化物粉体混合或还加入钛副族碳氢化物粉体，球磨混料，过筛后得到混合粉体；步骤2：将步骤1得到的混合粉体进行放电等离子体烧结或热压烧结，得到钛副族碳氮化物固溶体复相陶瓷材料。本发明制备方法利用同族元素之间固溶特性相互作为烧结助剂，可以丰富相界，改善钛副族陶瓷的烧结性能，达到固溶强化的效果。且当钛副族氢化物添加后，烧结过程在初期阶段进行保温，引入空位，显著提升了致密度。

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