US Patent No. 9,186,723

METHOD OF PRODUCING METAL MATRIX COMPOSITE (MMC) WITH UNIFORM SURFACE LAYERS


Patent No. 9,186,723
Issue Date November 17, 2015
Title Method Of Producing Metal Matrix Composite (mmc) With Uniform Surface Layers
Inventorship Richard Adams, Bolton, MA (US)
Sarly Pino, Pawtucket, RI (US)
Assignee CPS technologies Corp, Norton, MA (US)

Claim of US Patent No. 9,186,723

17. A method of making a Metal Matrix Composite with uniform surface layers, comprising the steps of:
placing at least one first ceramic fiber paper layer(s) on the base of a mold;
placing at least one preform layer(s) over said at least one first ceramic fiber paper layer(s);
placing at least one second ceramic fiber paper layer(s) on the top of said at least one preform layer(s);
wherein said at least one first ceramic fiber paper layer(s) and said at least one second ceramic fiber paper layer(s) are
each about 5 to about 15 thousandths of an inch in thickness;

compressing said at least one first ceramic fiber paper layer(s) and said at least one second ceramic fiber paper layer(s)
against said at least one preform layer(s) within said mold, wherein said thickness of said at least one first ceramic fiber
paper layer(s) and said at least one second ceramic fiber paper layer(s) are compressed between from about 10% to about 90%
of said thicknesses; and

centering said at least one preform layer(s) within said mold cavity, said centering step further including the step of said
compressed at least one first ceramic fiber paper layer(s) and said compressed at least one second ceramic fiber paper layer(s)
exerting an equal and opposite force on said at least one preform layer(s) within said mold whereby said at least one preform
layer(s) are centered within said mold cavity, wherein said thickness of said at least one first ceramic fiber paper layer(s)
and said at least one second ceramic fiber paper layer(s) are equal following said centering step.