The relationship between microstructure and properties of the reactive selfcomposing Al2O3/Al ceramic matrix composite was investigated in this paper. The results had shown that the bending strength and fracture toughness of the composite were affected by the content of aluminum alloy and porosity in the structure. When the metal content was about 20%￣30%

bending strength and fracture toughness of the composite reached 380￣420 MPa and 8.5￣9.5 MPa\5m12

respectively. The pore in the structure was very detrimental to properties of the Al2O3/Al composite. Especially

as the metal content in the composite was less than 10%

the pore was more detrimental to the properties.