Study on preparation and mechanical properties of in-situ ZrB_(2p)/Al composite

With high intensity ultrasonic treatment,a ZrB2 particle reinforced aluminum matrix composite was successfully fabricated by using the direct melt reaction method.The phase content and microstructure of composite were analyzed by using X-ray diffractometer(XRD) and scanning electron microscopy(SEM).The result shows that the size of ZrB2 particles in composite has become smaller and the distribution has been improved after high intensity ultrasonic treatment.The tensile strength,yield strength and the elongation of the composites reach to 94,81MPa and 14.5%,which are 10.6%,15.7% and 16.0% higher than those without ultrasonic assistance respectively.