00000caa a22000003i 4500 UP-1685594773862388565 Buklod 20210318200001.0 m | | ta 210318s2018 xx r |||| u|eng d (iLib)UPBAG-00039513756 STII-DOST BAG rda eng ARTICLE-2750 Jafari, Azadeh author. Interaction between plasma and tungsten carbide thin films coated on stainless steel as tokamak reactor first wall by Azadeh Jafari, Vahid Fayaz, Sakineh Meshkani, and S. Ali Asghar Terohid. 2018. pages 537-543 color illustrations 26 cm text rdacontent unmediated rdamedia volume rdacarrier Includes bibliographical references (pages 542-543) The physical properties of tungsten carbide (WC) thin film as a first wall material when it is exposed to the plasma of tokamak was studied in this research. In this regard, WC thin film was formed on grade 316L stainless steel ? via the hot filament chemical vapor deposition method ? to the sample installed on Iran tokamak 1 chamber and exposed to 300 shots of hydrogen plasma for a total duration of 11 s. For investigation of hydrogen plasma effects on morphology, crystalline structure properties, and roughness of the sample, X-ray diffraction (XRD), scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, and Raman spectroscopy analysis was performed. The experimental setup described and micrographs of the surfaces are shown. XRD analysis of WC thin film coated on stainless steel before and after plasma shots shows the changes in crystal structure. Based on the scanning electron microscopy images, it can be concluded that plasma exposure has created some cracks, holes, and lines. Also, the roughness of the sample after plasma shots decreased and it was observed that the thickness of WC thin film coated on stainless steel is reduced after plasma shots were introduced. Moreover, the weight loss of the uncoated sample was higher in comparison to the coated one. Finally, WC coating on the first wall of fusion device looks promising, but several open questions still remain to be solved. Physics. Firstwall. Scanning electron microscopy. Thin film. Tokamak. Tungsten carbide. X-ray diffraction. Fayaz, Vahid author. Meshkani, Sakineh author. Terohid, S. Ali Asghar author. The Philippine Journal of Science Vol. 147, no. 3, September 2018. Request full-text access via UPB University Library through https://forms.gle/KZjBv7aRtY6jiL5E9 (viewed 18 March 2021) FI UPBAG UPBAG-MAIN ARTICLE-2750 Analytics