Abstract
To improve the oxidation resistance and corrosion resistance of Zr-4 alloy,titanium nitride (TiN) coatings were prepared on the Zr-4 alloy with a TiN ceramic target with different ratios of N2.Microstructure and high-temperature properties of the TiN coated samples were studied by scanning electron microscopy (SEM),energy dispersive spectrometer (EDS),X-ray diffraction meter (XRD),X-ray photoelectron spectroscopy (XPS),heat treatment furnace and autoclaves,respectively.The x value of the TiN coatings (TiNx) ranges from 0.96 to 1.33.After the introduction of N2,TiN coating exhibits a weak (200) plane and a preferred (111) orientation.The coating prepared with an N2 flow ratio of 15％ shows an optimal oxidation resistance in the atmospheric environment at 800 ℃.In either 1 200 ℃ steam environment for one hour,or deionized water at 360 ℃ and a pressure of 18.6 Mpa for 16 d,the opitimized TiN coated samples have no delamination or spallation;and the gains in the masses of samples are much smaller than Zr-4 alloy.These results demonstrate the effectiveness of the optimized TiN coating as the protective coating on the Zr-4 alloy under extreme conditons.
基金项目
Funded by the National Science and Technology Major Project of the Ministry of Science and Technology of China(2015ZX06004001-002)
Postgraduate Research and Innovation Project of the University of South China(2017XCX11)
NETL
NSTL
维普
万方数据