MICROSTRUCTURE AND MECHANICAL PROPERTIES FOR ALUMINA/ COPPER NANOCOMPOSUES

摘要

An optimum route to fabricate the Al_2O_3/CU composite with sound microstructure and desired mechanical properties was investigated. The composite having a nano-sized Cu-dispersoid was successfully fabricated by controlled hot-pressing process using Al_2O_3 and CuO powder mixture as starting materials. The composite exhibited the maximum fracture strength as 819 MPa and enhanced toughness compared with monolithic Al_2O_3. The influence of processing condition and added Cu-phase upon the mechanical properties was discussed based on the observed microstructural characteristics.