Crucible for melting high chromium alloys
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United States of America Patent
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Issued Date -
Oct 30, 2008
app pub date -
Apr 30, 2007
filing date -
Apr 30, 2007
priority date (Note) -
Abandoned
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Abstract
A crucible material comprises in weight % as a dry particulates mixture, before sintering, about 89% to about 93% ZrO.sub.2, about 7% to about 11% Y.sub.2O.sub.3, up to about 0.6% SiO.sub.2 as an impurity element, and is substantially free of magnesia. The crucible can be used in the melting or holding of a high chromium sputtering target alloy to provide a low oxygen concentration of the melted alloy of 300 ppm by weight or less.
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