抄録
Using mixed powder compacts of the Fe-8.0%Cu–C ternary system containing up to 1.5% graphite, and Fe–Cu-1.0%C ternary system containing up to 12.0%Cu, a study of the effect of graphite content on the elimination of the abnormal expansion during the heating process of the Fe–Cu binary mixed powder compacts was carried out mainly by the differential dilatometric method and thermal analysis.
The results obtained were as follows: In both of the mixed powder compacts of the Fe-8.0%Cu–C ternary system with more than 8% graphite, and of the Fe–Cu-1.0%C ternary system with more than 4.0%Cu, a maximum expansion was observed at a temperature slightly higher than 1090°C during heating and then shrank at higher temperatures, and thermal analysis confirmed that the above-mentioned phenomenon is caused by the liquid phase sintering due to the Fe–Cu–C ternary monotecto-eutectic reaction at 1095°C.
