It is found that , the sintering process of w - ni - fe - cu alloy was a typical liquid - phase process , which including particle rearrangement stage , dissolving - precipitation stage and solid - phase sintering stage . cu plays an important role in the particle rearrangement stage , while fe can promote the densification by forming ni - fe - w bonding - phase . ni can not only form the bonding - phase , but also enhance the diffusion between the w grains 研究表明, w - ni - fe - cu合金的液相燒結(jié)致密化經(jīng)歷了顆粒重排、溶解-析出和固相燒結(jié)等三個(gè)階段, cu僅在顆粒重排階段起主導(dǎo)作用; fe主要在溶解-析出階段通過(guò)形成ni - fe - w三元粘結(jié)相來(lái)促進(jìn)w合金的燒結(jié)致密; ni不僅參與形成ni - fe - w三元粘結(jié)相,并且在w晶界上通過(guò)與w的互擴(kuò)散促進(jìn)了固相w晶粒的粘合。