Composite monolithic free abrasive grinding lap and a method of making the same
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United States of America Patent
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Jul 30, 1991
Issued Date -
N/A
app pub date -
Dec 4, 1990
filing date -
Mar 7, 1989
priority date (Note) -
Expired
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Abstract
A composite yet monolithic, free abrasive grinding lap includes a sintered porous matrix of ceramic or metal material and a quantity of silicon, substantially completely filling the pores of the sintered porous matrix preform at least throughout an effective region of the lap that is to come in contact with a workpiece to be acted upon by the lap. The free abrasive grinding lap is made by first slip-casting a preform, then freezing and freeze-drying the same, followed by lightly sintering the dry preform into a porous matrix preform, bringing the temperature of the preform to above the melting point of silicon, and filling the pores with molten silicon.
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