Preparation method of copper-based oxide dispersion strengthened Cu-Y2O3 composite material

The invention discloses a preparation method of a copper-based oxide dispersion strengthened Cu-Y2O3 composite material. The preparation method specifically comprises the following steps: (1) mechanical alloying; (2) calcining and reducing; and (3) spark plasma sintering. The copper-based oxide is used for mechanical alloying to promote non-equilibrium diffusion of oxygen elements in the material, strengthening phase yttrium oxide particles are formed in situ, the yttrium oxide particles are evenly dispersed and distributed in a matrix in the ball milling process, and the dispersion strengthening effect is achieved. Copper oxide particles are brittle in texture, powder particles and grinding balls are impacted and collided for a long time in the ball milling process, the copper oxide particles are repeatedly broken and fractured, the particle size of the Cu-Y2O3 composite powder finally obtained after calcination reduction is small, the small particle size means that the powder is fine, distribution of a rein