Study on the Hardness and Microstructure of Carbon Nanotubes/Buctile Cast-iron Composites Fabricated by Lost Foam Casting
It has been investigated that the carbon nanotube(CNT) was added into ductile iron using lost foam casting method.The microstructure and hardness for the carbon nanotube-ductile iron composite samples were observed and measured.The results showed that the CNT can in effect be added into ductile iron using lost foam cast method.As the CNTs added in,graphite nodule size in the ductile iron reduces,ferrite content and pearlite content unchanged,the brinell hardness increased;the excessive addition resulted in aggregation.