SYMPOSIA PAPER Published: 01 January 1979
STP35800S

Relative Erosion Resistance of Several Materials

Source

Over 200 materials were screened by a high-velocity sandblast-type erosion test to determine their suitability for application in coal gasifier valves. Most metals had relatively similar and low erosion resistances. Ceramics and cermets such as boron carbide (B4C), tungsten carbide (WC), silicon carbide (SiC), silicon nitride (Si3N4>, and titanium diboride (TiB2), if manufactured to minimize porosity, had more than four times the erosion resistance of metals. Several coatings such as boronized molybdenum and tungsten carbide, chemical vapor-deposited titanium carbon nitride (TiCN), and electrodeposited TiB2 also proved highly erosion resistant when applied in sufficient thicknesses. Additional findings confirmed that cermet binder content and ceramic porosity are related to erosion resistance.

Author Information

Hansen, JS
Albany Metallurgy Research Center, Federal Bureau of Mines, Albany, Oregon
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Details
Developed by Committee: G02
Pages: 148–162
DOI: 10.1520/STP35800S
ISBN-EB: 978-0-8031-4737-9
ISBN-13: 978-0-8031-0334-4