Preparation method of modified authigenic ZTA composite ceramic with good wettability with high-chromium cast iron

Abstract

The invention discloses a preparation method of modified in-situ ZTA composite ceramic with good wettability with high-chromium cast iron, and relates to the technical field of ceramic-based composite materials. The preparation method comprises the following steps: fully stirring and mixing a ZTA precursor solution prepared from aluminum ammonium sulfate, zirconium oxychloride, yttrium nitrate, polyethylene glycol and ammonium bicarbonate through chemical coprecipitation with a Ni precursor solution prepared from nickel acetate hydrate and potassium hydroxide through a chemical precipitation method, carrying out liquid-liquid doping, and carrying out calcination and reduction processes to obtain powder; a modified authigenic ZTA multiphase ceramic block with good wettability with high-chromium cast iron can be obtained after vacuum hot pressed sintering, and the ceramic block can be used in a ceramic particle reinforced iron-based composite material after being broken and sieved; the ZTA composite ceramic is in-situ synthesis, nickel is dispersed and uniformly distributed in ZTA, an interface is improved through a wetting and diffusion mechanism, and the wettability of the ZTA and high-chromium cast iron can be effectively improved under the condition that the performance of the ZTA is not affected.