Solution precursor plasma sprayed tungsten oxide particles and coatings

ABSTRACT

Solution precursor plasma spray process was used to deposit single particles and coatings of tungsten oxide (WO₃), and the microstructures of single particles and coatings were characterized by field emission scanning electron microscopy. The effects of substrate temperature and spraying distance on the microstructure of single particles and coatings were studied. In the case of WO₃ particles, the particle spheroidization degree became better as the increase in substrate temperature. When the substrate temperature increased up to 200°C, bubble-like morphologies appeared. For the deposited WO₃ coatings, a highly porous structure was obtained when a 100 mm spraying distance was used. Besides, the grain size of coatings decreased through increasing the spraying distance from 60 to 100 mm.

KEYWORDS:

• Ceramics
• coatings
• nanostructures
• spray
• surface
• temperature

Additional information

Funding

This work is supported by the Natural Science Foundation of China under Grant No. 51402255, Six Talent Peaks Project in Jiangsu Province under Grant No. JXQC-031, Yangzhou Science Fund for Distinguished Young Scholars under Grant No. YZ2017096, and Marine Science and Technology Project of Jiangsu Province under Grant No. HY2017-10.