论文部分内容阅读
Fe_(76)Si_9B_(10)P_5/Zn_(0.5)Ni_(0.5)Fe_2O_4 amorphous composite with micro-cellular structure and high electrical resistivity was prepared by spark plasma sintering(SPS) at 487 °C. XRD and SEM results showed that the Fe_(76)Si_9B_(10)P_5 alloy powders remained the amorphous state and the composite was dense. A fusion zone at interface of Fe_(76)Si_9B_(10)P_5 cell body and Zn_(0.5)Ni_(0.5)Fe_2O_4 cell wall was observed by TEM, which also indicates the formation of local high temperature. The interface bonding based on the formation of local high temperature in SPS process was observed. It is believed that the tip effect of Zn_(0.5)Ni_(0.5)Fe_2O_4 nanoparticles promotes the local discharging and plasmas creation in the gaps, and the discharging energy forms an instantaneous local high temperature to complete the local sintering and the densification of Zn_(0.5)Ni_(0.5)Fe_2O_4 particles at a low nominal sinter temperature. Simultaneously, the local high temperature stimulates the adjacent gaps discharging, thus facilitate the continuous formation of new discharging path. Finally, sintering and densification of the amorphous composite is complete.
Fe_ (76) Si_9B_ (10) P_5 / Zn_ (0.5) Ni_ (0.5) Fe_2O_4 amorphous composite with micro-cellular structure and high electrical resistivity was prepared by spark plasma sintering (SPS) at 487 ° C. XRD and SEM results showed that The Fe_ (76) Si_9B_ (10) P_5 alloy powders remain in amorphous state and the composite was dense. A fusion zone at interface of Fe_ (76) Si_9B_ (10) P_5 cell body and Zn_ (0.5) Ni_ (0.5) Fe_2O_4 cell which was indicated that the tip effect of Zn_ (0.5) Ni_ (0.5) Fe_2O_4 nanoparticles promoted the local discharging and plasmas creation in the gaps, and the discharging energy forms an instantaneous local high temperature to complete the local sintering and the densification of Zn_ (0.5) Ni_ (0.5) Fe_2O_4 particles at a low nominal sinter temperature. Simultaneously, the local high temperature stimulates the adjace nt gaps discharging, thus facilitating the continuous formation of new discharging path. Finally, sintering and densification of the amorphous composite is complete.