Surface oxide layer strengthening and fracture during flattening of powder particles
Surface oxide layer strengthening and fracture during flattening of powder particles
复制标题
粉末颗粒压扁过程中的表面氧化层强化和断裂
DOI:
10.1016/j.scriptamat.2024.116008
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发表时间:
2024
影响因子:
6
通讯作者:
Hassani, Mostafa
中科院分区:
文献类型:
--
作者:
Tang, Qi;Ichikawa, Yuji;Hassani, Mostafa
Surface oxide layer fracture and the subsequent exposure of clean metallic surfaces are critical in various solid-state processes for powder consolidation and additive manufacturing. We resolve this processin-situby deforming individual spherical powder particles inside a scanning electron microscope. We reveal three fracture modalities, i.e., meridian, radial, and circumferential cracking that sequentially activate with particle flattening. Real time measurements of load and displacement upon particle flattening also reveal a significant strengthening effect by surface oxide. We attribute the strengthening to two mechanisms: the composite strengthening and the strain gradient strengthening.
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DOI:
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发表时间:
2012
期刊:
Journal of thermal spray technology (Print)
影响因子:
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DOI:
--
发表时间:
2021
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