Laser surface annealing and characterization of Ti2AlC plasma vapor deposition coating on zirconium-alloy substrate

THIN SOLID FILMS

卷:615

Article

Yeom, Hwasung¹  Hauch, Benjamin¹  Cao, Guoping¹  Garcia-Diaz, Brenda²  Martinez-Rodriguez, Michael²  Colon-Mercado, Hector²  Olson, Luke²  Sridharan, Kumar¹ 

[1] Univ Wisconsin, Dept Engn Phys, 1500 Engn Dr Rm 919, Madison, WI 53706 USA

[2] Savannah River Natl Lab, Aiken, SC 29808 USA

关键词: Ti2AlC maxphase;    Magnetron sputter deposition;    Laser surface annealing;    Wear test;    Steam corrosion test;   

DOI  :  10.1016/j.tsf.2016.07.024

来源: Elsevier

【 摘 要 】

Laser surface treatment of amorphous Ti-Al-C (50:25:25 at.%) coating deposited on Zircaloy-4 substrate by dc magnetron sputtering was parametrically investigated as a function of surface temperature and dwell time. The as-deposited coating was transformed to crystalline Ti2AlC without significant phase alteration of Zircaloy-4 substrate under optimized conditions (900 degrees C for 3 s). Thermal analysis via commercial finite element software was applied to guide the selection of parameters for laser surface treatment. Coating performance was evaluated with wear and scratch tests as well as high temperature steam oxidation tests. Although laser treatment led to the formation of microcracks, it was noted to improve the mechanical integrity of the coatings and the oxidation tests indicated the protective nature of the as-deposited and laser-annealed coatings. The oxide particulate morphology and size formed during the steam oxidation tests varied dramatically between the as-deposited and laser-annealed coatings. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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