Reinforcement preform for metal matrix composites

Details Reinforcement preform for metal matrix composites Reinforcement preform for metal matrix composites

2005-01-18

2005-01-18

Marcantoni, Paul (Department: 1755)

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

C501S089000, C501S090000, C501S091000, C501S092000, C501S093000, C501S096100, C501S096400, C501S099000, C501S101000, C501S108000, C075S236000, C075S238000, C075S241000

Reexamination Certificate

active

06844281

ABSTRACT:
A preform for use in a metal matrix composite, particularly for a magnesium metal composite. In the preform the reinforcing material typically is silicon carbide, boron nitride, titanium nitride, carbon or graphite. The binder used in the preform is sintered magnesium fluoride, which avoids the known problems which result from the high reactivity of molten magnesium metal with other binders, such as silica and alumina, which results in the formation of magnesium oxide in the reinforced composite. The presence of magnesium oxide crystals in the metal matrix adversely affects the properties of the composite. The preform generally has a void volume of from about 50% to about 95%.

REFERENCES:
patent: 4657876 (1987-04-01), Hillig
patent: 5043305 (1991-08-01), Tanaka et al.
patent: 6193915 (2001-02-01), Lo et al.
patent: 06247780 (1994-09-01), None
patent: 07 033526 (1995-03-01), None

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