| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1565471 | Journal of Nuclear Materials | 2013 | 5 Pages |
Abstract
Microstructures of vacuum plasma sprayed (VPS) and brazed W on NIFS-HEAT-2 were studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). During the VPS process, growth of grains perpendicular to the interface was prominent. The blocky Ti-oxides, which have a strong effect on the mechanical properties before and after irradiation, were dissolved in the interface region of NIFS-HEAT-2. Understanding the effect of heat treatment (namely, post-coating heat treatment) on W-coated materials is important to reduce the irradiation induced hardening effects on the materials. After a heat load of about 5Â MW/m2 (â¼16Â cycles), the surface of VPS-W has a very fine rough structure but no prominent cracks due to thermal heat loads were detected.
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Authors
H. Watanabe, T. Tokunaga, N. Yoshida, T. Nagasaka, T. Muroga,