Process for producing a metastable precursor powder and for producing sialon from this powder
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United States of America Patent
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Jan 22, 1980
Grant Date -
N/A
app pub date -
Oct 23, 1978
filing date -
Oct 23, 1978
priority date (Note) -
Expired
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Abstract
There is disclosed a process for producing a metastable precursor powder having about 20 to 60 percent of the silicon thereof in the nitride form. This process includes a controlled nitriding step using silicon, alumina, and either aluminum or aluminum nitride as starting materials. There is also disclosed a process for producing sialon from this precursor powder. This process includes the steps of doping the precursor powder, cold pressing or slip casting the doped powder, and then carrying out a controlled sintering step under a nitrogen atmosphere.
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