Wear behavior of ceramic nozzles in coal water slurry burning
Source abstract
Abstract
Abstract In this paper, Al 2 O 3 /(W,Ti)C ceramic composite and WC/Co cemented carbide were prepared for the use of nozzle materials in coal water slurry (CWS) burning. The wear behavior of nozzles made from these materials was compared by determining the cumulative volume loss and the erosion rates. Results showed that the hardness of the nozzles plays an important role with respect to its erosion wear in CWS burning processing. The Al 2 O 3 /(W,Ti)C nozzles possessing high hardness exhibited lower erosion rates, while the WC/Co cemented carbide nozzles with a low hardness showed higher erosion rates under the same test conditions. Examination of eroded bore surface of the nozzles showed that wear of the WC/Co cemented carbide nozzle occurred by a preferential removal of the metal binder followed by pluck out of the exposed WC grains, while the primary wear mechanisms of Al 2 O 3 /(W,Ti)C ceramic nozzle exhibited polishing action in the hole and thermal shock damage with chipping at the bore exit.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Coal Combustion and Slurry Processing · Erosion and Abrasive Machining · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
Show source-provided references
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