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Indexed by:期刊论文

Date of Publication:2012-07-06

Journal:Advanced Materials Research

Included Journals:CPCI-S、EI、SCIE、Scopus

Volume:538-541

Page Number:2377-2381

ISSN No.:9783037854471

Key Words:High intensity pulsed ion beam (HIPIB); Yttria-stabilized zirconia thermal barrier coating (YSZ TBC); Surface modification

Abstract:The thermal barrier coatings (TBCs) of the yttria-stabilized zirconia (YSZ) has been deposited by the atmospheric plasma spraying (APS),followed by the irradiation of high intensity pulsed ion beam (HIPIB) with the voltage of 250 KV and the ion current density of 300 A/cm(2) and pulsed times of 2, 5, 10 and 20, respectively. The X-ray diffraction (XRD) analysis reveals that the coating is characterized by the tetragonal ZrO2 phase instead of the cubic phase and the original monoclinic phase after the irradiation. The scanning electron micros cope analysis demonstrates that the HIM treatment leads to a smooth TBC surface, but produces micro-cracks and round grain at the surface. This implies that the plasma erupts during the ion beam interaction with the coatings with poor thermal conductivity, and the micro-cracks were produced in the cooling process. The isothermal oxidation experiment performed at 1050 degrees C in air and suggests that the oxidation resistance of the coating can be largely enhanced after HTD3 treatment.