Effects of element proportions on microstructures of Nb/Nb5Si3 in situ composites by spark plasma sintering
作者： BoWen Xiong , WenYuan Long , Zhe Chen , Chun Xia , Hong Wan
DOI: 10.1016/J.JALLCOM.2008.03.095
关键词: Eutectic system 、 In situ 、 Shrinkage 、 Composite material 、 Sintering 、 Materials science 、 Spark plasma sintering 、 Volume fraction 、 Atom 、 Microstructure
摘要: Abstract Nb/Nb5Si3 composites were successfully fabricated by a spark plasma sintering (SPS) technology. The effects of element (Nb and Si) proportions on the microstructures synthesized mainly investigated. results show that strongly affect composites; in situ up to 99.59% theoretical density SPS technology, comprise Nb5Si3 uniformly distributed Nb particles. Moreover, with increase Si content from 6% 20% (atom fraction), volume fraction increases, whereas size particles decrease obviously. higher shrinkage densification for (16 at.% 20 at.%) close eutectic composition take place. When temperature over 1400 °C, obviously retards finally stops.
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