论文部分内容阅读
对Fe-Cu粉体的烧结规律进行实验研究。结果表明,烧结过程中固体颗粒的总固相体积分数逐渐减少,并伴随液相区成分梯度的消失,导致界面上升或下降,此位移是由消除成分梯度的沉降机制和固相颗粒重组的沉降机制共同控制。成分梯度消失后,烧结过程进入仅由后一种重组机制控制的慢速界面位移。当初始固相体积分数大于某临界值时,液相区内无成分梯度,所以整个烧结过程由重组机制控制。
The sintering of Fe-Cu powder was studied experimentally. The results show that the total solid volume fraction of solid particles decreases gradually with the disappearance of the compositional gradient of the liquid phase, which leads to the rise or fall of the interface. This displacement is caused by the sedimentation mechanism of the composition gradient elimination and the settlement of the solid phase recombination Mechanisms common control. After the composition gradient disappears, the sintering process enters a slow interface displacement that is controlled only by the latter recombination mechanism. When the initial solid phase volume fraction is greater than a critical value, there is no component gradient in the liquid region, so the entire sintering process is controlled by the recombination mechanism.