Refractory Boride and Nitride Ceramic Coatings Sprayed by the Ceramic Jets
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The jetting of boride and nitride ceramics and the application to thermal spray coatings were investigated. The jetting was the electrothermal explosion of the ceramic powders caused by high-voltage electrical breakdown and large-current Joule heating. Observation of zirconium boride jet was conducted by flash, soft X-ray shadowgraph. It was found that the leading velocity of the condensed parts of particles in the ceramic jet reached 1km/s. Titanium boride and titanium nitride jets were applied to thermal spray coatings. The coatings obtained on substrates were analyzed, and it was found that they were formed through dense deposition and heavy mixing of the sprayed materials with the substrates. The thickness of the deposition ranged several tens μm.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 1472-1474, 1998
The Japan Society of High Pressure Science and Technology