COMPOSITE MATERIAL Russian patent published in 2004 - IPC

FIELD: composites. SUBSTANCE: composite material, designed for aerospace, high-temperature engineering, transport mechanical engineering, semiconductor and nanotechnology, and can be used in manufacture of general-destination ware, contains 16-42% of high-strength carbon threads forming three-dimensional reinforced framework and pyrocarbon matrix. The latter is precipitated according to gas-phase technology for densification of a porous medium by radially moving pyrolysis zone technique. Threads if adjacent horizontal layers can be arranged orthogonally to each other at an angle 120 deg. or 45 deg., ratio of linear densities of threads belonging to even and uneven layers being expressed through natural numbers. Distances between planes of symmetry in adjacent alternate uneven and even layers of threads constitute 0.3 to 1.5%. Distances between planes of symmetry in vertically arranged layers of threads being in parallel to directions of reinforcements of threads in horizontal layers are within 1.0 to 6.4 mm. 5 to 42% of the volume of matrix is represented by isotrope pyrocarbon with particle size not exceeding 50 mcm, remaining part of volume being occupied by anisotropic pyrocarbon. Interlayer distance between graphite-like lattices of composite material represents at least 1.02 interlayer distances in graphite. Invention allows manufacturing large-size thick-wall products. Volume density of material ranges between 1.67 and 1.83 g/cu.cm, stretching strength 66-102 MPa, and coefficient of elasticity on stretching 0.15-0.36%. EFFECT: improved consumer's quality of material and products therefrom. 4 cl, 1 tbl, 7 ex