In order to evaluate the effect of interparticle contact area on the sintering behavior of 3Y-TZP nanopowder, the shrinkage of powder samples, compacted at different pressures were measured under constant rates of heating. Compaction of zirconia NPs at different pressures allowed to increase the contact area between particles and determined the critical parameters when the volume diffusion mechanism is changing on the grain boundary diffusion. It was found that the volume diffusion mechanism is the dominant densification mechanism at the initial stage of sintering for 3Y-TZP nanopowders at a low relative density of green ceramics, when there are few contacting particles, and the grain boundary diffusion mechanism cannot be realized due to the large diffusion path. The domination of the grain boundary diffusion mechanism during initial stage of sintering of 3Y-TZP nanoparticles was detected in case the contact area between particles increased up to 56%.

为了评估颗粒间接触面积对3Y-TZP纳米粉烧结行为的影响，在恒定的加热速率下测量了在不同压力下压实的粉末样品的收缩率。当体积扩散机制在晶界扩散上改变时，在不同压力下氧化锆NPs的压实可以增加颗粒之间的接触面积，并确定了关键参数。发现在相对密度低的绿色陶瓷中，当接触颗粒很少时，体积扩散机理是烧结3Y-TZP纳米粉体初始阶段的主要致密化机理，并且不能实现晶界扩散机理。到大的扩散路径。