| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1564998 | Journal of Nuclear Materials | 2014 | 4 Pages |
•A HCPEB facility was introduced to perform the transient high heat load test.•APS submicron W coating, APS micron W coating and CVD-W coating were tested.•The behavior of three kinds of W coatings under transient high heat load was investigated.
Three kinds of tungsten coatings are fabricated by means of APS and CVD, and evaluated by transient high heat load tests by 25 high-intensity current pulsed electron beam pulses with a duration of 0.2 ms and power densities of 0.4, 0.6 and 0.8 GW/m2. Remelting and solidification are found on post-test APS-W coating. However, cracks are developed for the same power densities for the CVD-W coating. APS-W coatings have about 20 times mass loss of CVD-W coating. The mass loss is related to the peak surface temperature of the APS-W coating exceeding the tungsten melting point (3410 °C) during electron beam irradiation. The CVD-W coating during testing was only 1000 °C.
