Ceramic metal composite brake components and manufacture thereof
AssigneeThe Dow Chemical Company
InventorsArthur R. Prunier, Jr., Aleksander J. Pyzik
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Abstract
A brake component wherein at least a portion of said brake component is a ceramic metal composite (CMC), the CMC having an interconnected ceramic phase and a noncontiguous metal phase dispersed within the interconnected ceramic phase. In particular, a CMC of dense boron carbide-aluminum composite having high specific heat and low density is described.
Claims18
A brake component having at least about 5 percent by volume of said brake component being a ceramic metal composite (CMC), the CMC having:
- an interconnected crystalline ceramic phase and a noncontiguous metal phase dispersed within the interconnected ceramic phase,
- a density of at most about 6 g/cc,
- a specific heat of at least about 0.8 J/g.degree.C., and
- a flexure strength of at least about 150 MPa at 900.degree. C., wherein at least 45% by volume of the ceramic phase has a melting or decomposition temperature of at least about 1400.degree. C.
A brake having at least one friction element which has at least about 5 percent by volume of the element being comprised of a ceramic metal composite (CMC), the CMC contacting upon braking a second friction element and having:
- an interconnected crystalline ceramic phase and a noncontiguous metal phase dispersed within the interconnected ceramic phase,
- a density of at most about 6 g/cc,
- a specific heat of at least about 0.8 J/g.degree.C.,
- an autogenous dynamic coefficient of friction of at least about 0.4,
- a hardness of at least about 1000 Kg/mm.sup.2, and
- a flexure strength of at least about 150 MPa at 900.degree. C.
- wherein at least 45% by volume of the ceramic phase has a melting or decomposition temperature of at least about 1400.degree. C.
Dependencies are inferred from the claim text.