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首页> 外文期刊>Scripta materialia >A new mechanism for field-assisted processing and flash sintering of materials
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A new mechanism for field-assisted processing and flash sintering of materials

机译:一种新的材料现场辅助处理和快速烧结机制

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摘要

A unified mechanism for field-assisted phenomena such as enhanced rapid flash sintering, reduction in flow stress and grain growth retardation is proposed. It is argued that defect segregation causes enhanced ionic and electronic transport along dislocations and grain boundaries, which leads to enhanced mobility of dislocations and their selective Joule heating. This selective heating, if uncontrolled, can lead to an avalanche and selective melting of grain boundaries, which is proposed to be the primary mechanism for flash sintering of oxides.
机译:提出了一种用于现场辅助现象的统一机制,例如增强的快速快速烧结,降低流应力和晶粒长大延迟。有人认为,缺陷偏析会导致沿着位错和晶界的离子和电子传输增强,从而导致位错的迁移率提高,并导致选择性的焦耳热。如果不加以控制,这种选择性加热会导致雪崩和晶界选择性熔化,这被认为是氧化物快速烧结的主要机理。

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