Internal combustion engine and composite parts formed from silicon carbide fiber-reinforced ceramic or glass matrices
AssigneeUnited Technologies Corporation
InventorsKarl M. Prewo, John J. Brennan
Life of this patent
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Abstract
A high strength, fracture tough, high temperature oxidatively stable, heat insulating internal combustion engine combustion chamber component is described made of a silicon carbide fiber reinforced ceramic matrix or a silicon carbide fiber reinforced glass matrix material. An internal combustion engine containing combustion chamber components as above described is also disclosed.
Claims20
An internal combustion engine combustion chamber component comprising a plurality of substantially titanium-free ceramic layers selected from the group consisting of (a) aluminosilicate, (b) lithium aluminosilicate, (c) magnesium aluminosilicate, and (d) mixtures thereof, each layer reinforced with a plurality of unidirectional, continuous length silicon carbide fibers, each layer having an axial flexural strength greater than 70,000 psi, a high fracture toughness exemplified by a critical stress intensity factor greater than 10.times.10.sup.3 psi (inch).sup.1/2, high temperature strength, high temperature oxidation stability, and good insulating properties.
An internal combustion engine combustion chamber component comprising a silicon carbide fiber reinforced glass composite consisting essentially of about 30% to about 70% by volume silicon carbide fibers in a glass matrix selected from the group consisting of borosilicate glass, high silica content glass, aluminosilicate glass and mixtures thereof, the composite having a fracture toughness exemplified by a critical stress intensity factor above about 15,000 psi (inch).sup.1/2, high temperature strength, high temperature oxidation stability and insulating properties.
An internal combustion engine containing at least one combustion chamber component comprising a plurality of substantially titanium-free ceramic layers selected from the group consisting of (a) aluminosilicate, (b) lithium aluminosilicate, (c) magnesium aluminosilicate, and (d) mixtures thereof, each layer reinforced with a plurality of unidirectional, continuous length silicon carbide fibers, each layer having an axial flexural strength greater than 70,000 psi, a high fracture toughness exemplified by a critical stress intensity factor greater than 10.times.10.sup.3 psi (inch).sup.1/2, high temperature strength, high temperature oxidation stability, and good insulating properties.
An internal combustion engine containing at least one combustion chamber component comprising a silicon carbide fiber reinforced glass composite consisting essentially of about 30% to about 70% by volume silicon carbide fibers in a glass matrix selected from the group consisting of borosilicate glass, high silica content glass, aluminosilicate glass and mixtures thereof, the composite having a fracture toughness exemplified by a critical stress intensity factor above about 15,000 psi (inch).sup.1/2, high temperature strength, high temperature oxidation stability and insulating properties.
Dependencies are inferred from the claim text.