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Steric Stabilization of Nonaqueous Silicon Slips: II, Pressure Casting of Powder Compacts
Author(s) -
Kerkar Awdhoot V.,
Henderson Robert J. M.,
Feke Donald L.
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb06690.x
Subject(s) - materials science , silicon , polymer , casting , steric effects , copolymer , economies of agglomeration , chemical engineering , methyl methacrylate , composite material , metallurgy , organic chemistry , chemistry , engineering
The application of a steric stabilization strategy to the processing of nonaqueous silicon slips is investigated. With this method, unfavorable particle interactions within silicon slips processed in benzene and trichloroethylene can be effectively controlled. Use of specific polymers additives (poly(styrene), poly(methyl methacrylate), and their copolymer) results in a substantial improvement in the pressure casting performance of silicon slips. Control of particle agglomeration during processing yields green compacts with better packing as reflected by the measurements of cake permeability and casting resistance. Substantial improvement in green compacts density was seen. The polymer additives also acted as binders providing sufficient green strength to the compacts so as to render them handleable.