![Fig.9-26 SEM observation on VPS-W before and after FSP](img/honbun/large/e2015_9-26.jpg)
Fig.9-26 SEM observation on VPS-W before and after FSP
The elongated grains in as-VPS-W become finer and more uniform, and the number of interfacial cracks become much less after FSP is applied.
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