The figure is a chart of sample weight change (vertical axis) versus the duration of oxidation-reduction exposure (horizontal axis). There are six plots in the chart. The four lowest plots--pure Cu, Cu-0.3Al2O3 (Glidcop AL-15), Cu-3Ag-0.5Zr (NARloy-Z), and Cu-0.1Zr (AmZirc)--are all horizontal, showing that, for these materials, all weight gained by oxidation was lost by reduction in each cycle. That indicates that all four materials are susceptible to blanching. The two top plots are for Cu-Cr-Nb alloys-Cu-4Cr-2Nb and Cu-8Cr-4Nb (GRCop-84). Both are rising curves, showing steady weight gain with time, an indication that a protective oxide grew throughout the exposure. Both materials should be resistant to blanching.
Last updated: August 11, 2004 2:57 PM
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