PREPARATION,PROPERTIES AND INTERFACE STRUCTURES OF Si_3N_(4w)/6061Al COMPOSITE

摘要

The Si₃N₄ whisker reinforced 6061Al composite with bending strength of 790 MPa wasprepared by squeeze casting process.After heat-treatment under T6 regime i.e.530℃,1 h solutioning and 160℃,24 h aging,an increment in strength and microhardnessmay be over 20% and 28% respectively,The microstructures of Si₃N₄ whisker andSi₃N₄/Al interface were observed by meas of HRTEM.The relation between interracialstructure and composite properties was discussed.