Wear-resistant ceramic for casting rare earth alloys
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United States of America Patent
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Oct 30, 1990
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N/A
app pub date -
Sep 24, 1987
filing date -
Sep 24, 1987
priority date (Note) -
Expired
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Abstract
Refractory ceramics are provided which comprise at least about 70 mole percent yttrium oxide and from about 5 to 30 mole percent aluminum oxide. The ceramics are particularly resistant to attack by molten rare earth alloys and are superior refractories for use with molten neodymium-iron alloys in the manufacture of permanent magnets.
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