Pattern Formation during Current Sintering

电流烧结过程中图案的形成

• 批准号: 319412819
• 负责人: Professor Dr. Markus Winterer
• 金额: --
• 依托单位: Forschungsgruppe Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/319412819?language=en
• 关键词: Pattern; Formation; during; Current; Sintering

The microstructural evolution during current sintering is investigatedexperimentally and theoretically for the case that the conductivity dropslocally due to a reaction-diffusion process induced by the current.Aluminum-doped ZnO serves as a paradigm for this class of transportprocesses with negative feedback. The self-organized patterns that emergedue to this mechanism are being analyzed in dependence of the processparameters for thin films as well as for bulk samples. The possibility ofmanipulating the pattern formation e.g. by applying the current as apulse sequence or by external cooling are explored. Potentially they willallow control of the micro-structure on length scales larger than grain orpore size in the green body.

对于由于电流引起的反应扩散过程而导致电导率局部下降的情况，从实验和理论上研究了电流烧结过程中的微观结构演变。铝掺杂ZnO作为此类负反馈输运过程的范例。正在根据薄膜和大块样品的工艺参数来分析由该机制产生的自组织图案。操纵模式形成的可能性，例如通过施加电流作为脉冲序列或通过外部冷却进行了探索。它们有可能允许在比生坯中的晶粒或孔隙尺寸更大的长度尺度上控制微观结构。