公开(公告)号：EP0888245A4

公开(公告)日：2001-01-17

申请号：EP97916893

申请日：1997-03-06

Applicant: NASA

Inventor： RIVERS HORACE KEVIN ,  RANSONE PHILIP OWEN ,  NORTHAM GEORGE BURTON ,  SCHWIND FRANCIS ALOYSIUS

IPC: C04B35/83 ,  F02F3/00 ,  F02F7/00 ,  B32B18/00 ,  F16J1/01

CPC classification number: F02F3/00 ,  C04B35/83 ,  F02F7/0085 ,  F05C2201/021 ,  F05C2201/0433 ,  F05C2201/0448 ,  F05C2203/0808 ,  F05C2203/0882 ,  F05C2251/042 ,  F05C2253/16

Abstract: An improved structure for carbon-carbon composite piston architectures is disclosed. Initially, the carbon fabric or tape layers are prepregged with carbonaceous organic resins and/or pitches and these plies (21) laid up or molded about a mandrel, to form a carbon-fiber reinforced organic-matrix composite billets (20) shaped like a 'U' channel having legs (26, 27), a 'T'-bar, or a combination of the two. The molded carbon-fiber reinforced organic-matrix composite part is then pyrolized in an inert atmosphere, to convert the organic matrix materials to carbon. At this point, cylindrical piston blanks (22) are cored from the 'U'-channel, 'T'-bar, or combination part. These blanks are then densified by reimpregnation with resins or pitches which are subsequently carbonized. Densification is also accomplished by direct infiltration with carbon by vapor deposition processes. Once the desired density has been achieved, the piston billets are machined to final piston dimensions; coated with oxidation sealants; and/or coated with a catalyst.

公开(公告)号：CA2248196A1

公开(公告)日：1997-09-12

申请号：CA2248196

申请日：1997-03-06

Applicant: NASA

Inventor： NORTHAM GEORGE BURTON ,  RIVERS HORACE KEVIN ,  RANSONE PHILIP OWEN ,  SCHWIND FRANCIS ALOYSIUS

IPC: C04B35/83 ,  F02F3/00 ,  F02F7/00 ,  F02F3/10 ,  B28B1/42

Abstract: An improved structure for carbon-carbon composite piston architectures is disclosed. Initially, the carbon fabric or tape layers are prepregged with carbonaceous organic resins and/or pitches and these plies (21) laid up or molded about a mandrel, to form a carbon-fiber reinforced organic-matrix composite billets (20) shaped like a "U" channel having legs (26, 27), a "T"bar, or a combination of the two. The molded carbon-fiber reinforced organicmatrix composite part is then pyrolized in an inert atmosphere, to convert the organic matrix materials to carbon. At this point, cylindrical piston blanks (22) are cored from the "U"-channel, "T"-bar, or combination part. These blanks are then densified by reimpregnation with resins or pitches which are subsequently carbonized. Densification is also accomplished by direct infiltration with carbon by vapor deposition processes. Once the desired density has been achieved, the piston billets are machined to final piston dimensions; coated with oxidation sealants; and/or coated with a catalyst.