关键词: B4C/Al复合材料;真空热压;界面反应;力学性能

Abstract: Great attention has been paid on B 4C/Al composite materials duo to their excellent properties. We used Al and B4C powder as raw material,the 10wt%boron carbide and aluminum matrix composites were prepared by the vacuum hot pressing sintering above the melting temperature of Al.We found the optimum hot press condition is that, the sintering temperature is 700 ℃ for 45 min at 30 MPa, the relative density,Vickers hardness and bending strength of B 4C/Al composites is 98.2%,2.53 GPa and 350 MPa, respectively.With the ball mill mixing method, Al2O3phase was generated on Al particle surface,which can produce co-melting materials with B2O3by solid-liquid reaction, then improve the interface bonding strength.

Key words: B4C/Al composite;vacuum hot pressing;interface reaction;mechanical property