TH31814B - Objects, compounds, fibers and processes are the same. - Google Patents

Abstract

DC60 fibrous compound material (7) consists of a composite of yarns (6) containing yarns (2A, 2B) that include at least one bundle (3) of carbon fibers and carbon components other than carbon fibers. The carbon components are three-dimensionally composite and homogenized without separation from one another, and a matrix made of Si-SiC based materials (4A, 4B, 5A, 5B) is packed between adjacent yarns (2A, 2B) within the composite of yarns (6); the method of preparing the fibrous compound material consists of the following steps: fabrication of bundles (3) of carbon fibers by infiltrating powdered carbon components into the bundles (3) of carbon fibers, resulting in a uniform matrix shape; plasticization around each bundle (3) of carbon fibers to obtain an intermediate material; casting the intermediate material to obtain a cast product by shaping the intermediate material into yarns and layering them in predetermined quantities of material, or sintering the cast product to obtain a sintered product; The casting or sintered product and Si were heated to temperatures of 1100 to 1400 °C in an inert gas atmosphere, and the casting or sintered product and Si were heated to temperatures of 1450 to 2500 °C. This resulted in the infiltration of the Si-SiC-based material into the inside of the pores of the casting or sintered product; a lightweight and strong compound was obtained, which exhibited excellent impact resistance, oxidative and corrosive corrosion resistance, creep resistance, crack resistance, wear resistance, low coefficient of friction, and self-healing ability by defects. The fibrous compound (7) consisted of a combination of yarns (6) with bundles of yarns (2A,2B) including at least one bundle (3) of carbon fibers and carbon components other than carbon fibers. The carbon fibers were three-dimensionally combined and homogenized. Without separation from one another and a matrix made of Si-SiC based material (4A,4B,5B) packed between adjacent threads (2A,2B) under the bonding of threads (6); methods of material preparation: powdered carbon fibrous compound material is placed in bundles (3) of carbon fibers, which creates a uniform matrix shape; plastic coating is applied around each bundle (3) of carbon fibers to obtain an intermediate material; casting of the intermediate material to obtain a cast product; shaping the intermediate material into threads and layering them in a predetermined volume of material; or sintering of the cast product to obtain a sintered product; holding the cast or sintered product and Si at 1100 to 1400 in an inert gas atmosphere; and heating the cast or sintered product and Si to temperatures from 1450 to 2500 °C, thus causing the Si-SiC based material to permeate into the inside of the pores of the cast or sintered product. Lightweight and strong composite materials are provided, exhibiting excellent impact resistance, oxidative corrosion resistance, resistance to highly corrosive environments, creep resistance, crack resistance, and wear resistance. Low coefficient of friction and self-healing capabilities are also achieved. Defects are maintained.

Claims (1)

1. The fibrous material is composed of a number of yarn aggregates (2A,2B) each containing at least one carbon fiber and other carbon components in addition to carbon fibers, which are three-dimensionally combined and formed into a single unit without separation from one another, and a matrix (8A,8B) made of a Si-SiC based material is packed between adjacent yarns (2A,2B) within the yarn aggregate, with the yarn surfaces coated with a silicon carbide phase (5C) protruding from the yarn surfaces. 2. The fibrous material as claimed in Reputation 1, in which the matrix contains a silicon carbide phase (5B) composed of silicon. and the silicon carbide phase (5C) emerges between the silicon phase and the yarn. 3. A fibrous composite material as claimed in Reputation 1 or 2 where the matrix (8A,8B) has a deviation composition with a higher silicon volume ratio by increasing the distance from the surface of the yarn (2A,2B). 4. A fibrous composite material as claimed in one of Reputations 1 through 3 where the yarn aggregation includes a number of yarn row elements (1A,1B, etc.), each yarn row element is made up by arranging a number of yarns (2A,2B) in distinctly parallel and two-dimensional directions, and the yarn row elements are stacked in layers to create the yarn aggregation. 5. A fibrous composite material as claimed in Reputation 4 where the yarn row elements (1A,1B) are arranged so that the longitudinal directions of their respective yarns (2A,2B) are adjacent to each other. 6. A fibrous material as claimed in any of the claims 1 through 5, in which matrix (8A,8B) is interconnected within the fibrous material to form a three-dimensional network structure. 7. A fibrous material as claimed in claim 5, in which matrix (8A,8B) is arranged in distinctly parallel and two-dimensional directions within each row element (1A,1B, etc.), and the matrix (8A,8B) protruding within each adjacent row element is interconnected, thus forming a three-dimensional matrix network. 8. A method for preparing the fibrous material consisting of the following steps: yarn production, where each yarn is a bundle of carbon strands, by saturating the powdered carbon component within the bundle of carbon strands; plastic coating of each bundle of carbon strands to obtain an intermediate material; and casting the intermediate material to obtain a cast product by layering in a predetermined quantity of material. Or the sintering of the cast product to obtain the sintered product; holding the cast or sintered product and Si at 1100 to 1400 °C in an inert gas atmosphere; and heating the cast or sintered product and Si to a temperature of 1450 to 2500 °C, thus saturating the Si-SiC based material to the inside of the pores of the cast or sintered product. 9. Method of preparing the fibrous material claimed in claim 9 involves holding the cast or sintered product at a heating temperature of 1100–1400 °C under a pressure of 0.1–10 hPa for one hour or more, and controlling the inert gas flow to 0.1 normal liters (NL) or more per 1 kg of the total weight of the cast or sintered product. 11. Method of preparing the fibrous material claimed in claim 8 involves holding the cast or sintered product. or calcined products, and Si are held at temperatures from 1100 to 1400 under pressure of 0.1 to 10 hPa for a period of one hour or more, and the inert gas is controlled to flow in a volume of 0.1 liters normal (NL) or more per 1 kg of the total weight of the cast or calcined product. 10. Method of preparing fibrous compound materials claimed in claims 7 or 9, in which the cast or calcined products and Si are heated to temperatures from 1450 to 2500 under pressure of 0.1 to 10 hPa.