Field Assisted Sintering of Nanostructured Zirconia-Alumina Ceramics for Demanding Applications
Field Assisted Sintering of Nanostructured Zirconia-Alumina Ceramics for Demanding Applications
复制标题
DOI：
10.1080/0371750x.2016.1172981
复制
发表时间：
2016-04
影响因子：
1.2
通讯作者：
J. Downs;Annapoorani Ketharam;B. Vaidhyanathan
中科院分区：
文献类型：
--
作者：
J. Downs;Annapoorani Ketharam;B. Vaidhyanathan
闪速烧结和场辅助烧结技术（FAST）已在许多单一陶瓷系统中得到证实。然而，很少有人做彻底调查这一现象在二元系统。氧化锆-氧化铝复合材料由于其广泛用于医疗保健、石化和能源应用的苛刻情况而受到关注。最小化与FAST相关的晶粒生长同时实现最大致密化的前景对于上述应用以提高性能是至关重要的。在高达700V.cm-1的直流电场范围内研究了几种氧化锆-氧化铝配方的闪速烧结行为。在低氧化铝含量（75wt%）下，场辅助烧结的有效性下降。这些指针允许获得进一步深入了解闪速烧结的机制，并将有助于开发适应该技术的途径，以处理复杂的陶瓷系统。图形摘要
ABSTRACT Flash and field assisted sintering techniques (FAST) have been demonstrated in many singular ceramic systems. However, little has been done to thoroughly investigate this phenomenon in binary systems. Zirconia-alumina composites are of interest because of their widespread use in demanding situations for health care, petrochemical and energy applications. The prospect of minimizing grain growth associated with FAST whilst achieving maximum densification is vital for the above applications to improve performance. Flash sintering behaviour of several zirconia-alumina formulations was investigated under a range of DC electric fields up to 700V.cm–1. At low alumina contents (75 wt%) the effectiveness of field assisted sintering drops off. These pointers allowed to gain further insight into the mechanisms of flash sintering and will help to develop pathways for the adaptation of the technique to process complex ceramic systems. GRAPHICAL ABSTRACT