Thermal stability and hydrogenation behavior of Zr-1Nb alloy with TiNx and Ti/TiNx coatings

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Kashkarov, E.B.^1 ; Vilkhivskaya, O.V.^2 ; Zakharchenko, S.A.^1

General Physics Department, Tomsk Polytechnic University, Tomsk

634050, Russia^1

Department of Atomic Energy Safety, Troitsk Institute for Innovation and Fusion Research, Troitsk, Moscow

142190, Russia^2

关键词: Coating delamination;    Dissolved hydrogen;    High temperature;    Hydrogen absorption;    Lower temperatures;    Reactive DC magnetron sputtering;    Thermal expansion coefficients;    Titanium nitride coating;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012192/pdf
DOI  :  10.1088/1742-6596/741/1/012192

来源: IOP

【 摘 要 】

Titanium nitride coatings were deposited by reactive dc magnetron sputtering (dcMS) to protect Zr-1Nb alloys from hydrogen embrittlement. Dense titanium (Ti) interlayer was prepared between TiNxprotection film and a Zr substrate to improve thermal stability and adhesion between the TiNxand the substrate at high temperatures. Hydrogen absorption of Zr- 1Nb with TiNxand Ti/TiNxat 623 K was reduced in comparison with uncoated Zr-1Nb. No peeling or cracks of Ti/TiNxcoatings is observed after thermal cycling up to 1073 K. The high temperature (1073 K) hydrogenation behaviour differs from the hydrogenation at lower temperature by increasing the amount of dissolved hydrogen in the β-phase of zirconium. The higher rate of hydrogen absorption by Zr-1Nb with TiNxwas observed due to the coating delamination as a result of differences in thermal expansion coefficients, while Ti/TiNx demonstrates the lower hydrogen absorption at 1073 K and good adhesion strength.