Compatibility of Al-Si Eutectic Alloy and Zr-2 at Different Heat-Treatment Temperature

To investigate the compatibility of Al-Si eutectic alloy and Zr-2 at different heat-treatment temperature for different time,the couple of them was prepared by powder-metallurgy method.The micro-structure and element distribution have been measured with SEM,EDS,and XRD.It is shown that the heat-treatment temperature and the state of Al-Si alloy greatly influence the compatibility.At 650℃×40h,the dramatic diffusion layer has been formed due to the infiltration and diffusion of liquid Al-Si alloy.At 560℃×240h,the diffusion layer is very thin because there exists a solid state diffusion only.At 350℃×240h,due to a much smaller diffusion coefficient,almost no diffusion layer occurs,which means a good compati-bility between Al-Si eutectic alloy and Zr-2 at this temperature.