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Resistance to solid-particle erosion was studied by measuring individual damage sites in directionally solidified Al 2 O 3 –ZrO 2 (Y 2 O 3 ) eutectics that contained three concentrations of Y 2 O 3 (0.5, 3, and 9% in the ZrO 2 phase). For comparison, polycrystalline Al 2 O 3 , sapphire, and polycrystalline and single-crystal...
Solid-particle erosion studies were conducted on a hardened Mg alloy (WE43A-T6) and the same alloy that had been anodized to produce a ≈12μm oxide layer. Angular alumina particles of nominal diameter 63 or 143μm traveling at 60 or 120m/s impacted the targets at 20° or 90°. Steady-state erosion rates were determined as weight loss of a sample per weight of impacting particles. Under these erosive conditions,...
Solid-particle erosion studies were conducted on a geopolymer derived from fly ash and granulated blast-furnace slag. The erodent particles, 390μm angular Al 2 O 3 , impacted at 30, 60, or 90 o at a velocity of 50, 70, or 100m/s. Steady-state erosion rates (ER) were obtained and the material-loss mechanisms were studied by scanning electron microscopy (SEM). The geopolymer...
Erosive damage was studied in Si 3 N 4 /BN fibrous monoliths (FMs) and the individual constituents of the cells and cell boundary, monolithic Si 3 N 4 and BN. Unidirectional, 0/90°, and ±45° FMs were tested. Specimens were subjected to impact at 90° by angular SiC particles of average diameter 143μm, traveling at 50–100m/s. Steady-state erosion rates in the FMs were...
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