Microstructures and Bending Properties of Cf/Mg Composites
In order to meet the requirements of lightweight structural materials in extreme space environment,the T300,T700,and M40 carbon fiber-reinforced magnesium matrix composites(Cf/Mg)are fabricated by the pressure infiltration method.The effects of carbon fiber on the interfacial microstructures and mechanical properties of the Cf/Mg composites are investigated.The results show that there is a serious interfacial reaction product Al4C3 in both the T300/AZ91D and T700/AZ91D composites,which makes the composites brittle fracture under the low stress.However,the amount and size of Al4C3 are reduced significantly at the interfaces in the M40/AZ91D composites,which implies a moderate interfacial bonding strength.Therefore,the M40/AZ91D composite can fully exert its load transfer effect,and ultimately exhibits a high bending strength of 1 100 MPa.
万方数据
维普
