Al_(18)B₄O_(33W)/AC4CH복합재료의 파괴인성 및 트라이볼로지 특성에 관한 연구 A Study on the Fracture Toughness and Tribology Characteristics of Al_(18)B₄O_(33W)/AC4CH Composites Material원문보기
Metal matrix composites(MMC) are attractive as structural materials because of their high specific strength and stiffness. They also offer improved wear resistance, optimized thermal expansion and capable of maintaining their excellent mechanical properties up to much higher temperatures than the un...
Metal matrix composites(MMC) are attractive as structural materials because of their high specific strength and stiffness. They also offer improved wear resistance, optimized thermal expansion and capable of maintaining their excellent mechanical properties up to much higher temperatures than the unreinforced metals. Because of the reduction in fabrication cast, the application of MMC has been widely extended to lightweight automobile parts, aerospace components and other industrial applications. As a new material, aluminum borate whisker(Al_(18)B₄O_(33w)) reinforced aluminum composites have attracted interest because of their good mechanical properties, thermal expansion coefficients and low cost. Many researchers indicate that Al_(18)B₄O_(33) whisker reinforced aluminum composites are the best type of whisker reinforced aluminum composite. Furthermore, the price of alumina borate whisker is far below that of silicon carbide whisker, which has also promoted this composite's wide application. In this paper, preform of composite materials were made from aluminum borate whisker with 5% regulated three kinds of inorganic binder, SiO₂ sol, Al₂O₃ sol, TiO₂ sol and sintered in 1100℃ before squeeze casting. An investigation was performed on the tensile strength and fracture toughness were carried out to obtain the characteristics between AC4CH and metal matrix composites. The composites has four type which composite was non added inorganic binder (Nobinder), composite was added inorganic binder, SiO₂ sol Al₂O₃ sol, TiO₂ sol. Tensile tests were performed in accordance with the ASTM E-8 standard test method. Fracture toughness tests were in accordance with the provisions of ASTM E399: Specimen was produced CT specimen W=25mm, B=12.5mm, Cross head speed 0.05mm/min in room temperature. Abrasion tester used a pin-on-disk type and a Si₃N₄ ceramic ball which used as machine structural materials. The test condition apply to load of 40N, 60N, 80N a 28.59mm/sec for 6 hours in room temperature. A study was to establish the influence on the fracture toughness of Al_(18)B₄O_(33W) reinforced AC4CH alloy composite mixed different inorganic binder. In addition, the surface was evaluated through the scanning electron micrographs(SEM).
Metal matrix composites(MMC) are attractive as structural materials because of their high specific strength and stiffness. They also offer improved wear resistance, optimized thermal expansion and capable of maintaining their excellent mechanical properties up to much higher temperatures than the unreinforced metals. Because of the reduction in fabrication cast, the application of MMC has been widely extended to lightweight automobile parts, aerospace components and other industrial applications. As a new material, aluminum borate whisker(Al_(18)B₄O_(33w)) reinforced aluminum composites have attracted interest because of their good mechanical properties, thermal expansion coefficients and low cost. Many researchers indicate that Al_(18)B₄O_(33) whisker reinforced aluminum composites are the best type of whisker reinforced aluminum composite. Furthermore, the price of alumina borate whisker is far below that of silicon carbide whisker, which has also promoted this composite's wide application. In this paper, preform of composite materials were made from aluminum borate whisker with 5% regulated three kinds of inorganic binder, SiO₂ sol, Al₂O₃ sol, TiO₂ sol and sintered in 1100℃ before squeeze casting. An investigation was performed on the tensile strength and fracture toughness were carried out to obtain the characteristics between AC4CH and metal matrix composites. The composites has four type which composite was non added inorganic binder (Nobinder), composite was added inorganic binder, SiO₂ sol Al₂O₃ sol, TiO₂ sol. Tensile tests were performed in accordance with the ASTM E-8 standard test method. Fracture toughness tests were in accordance with the provisions of ASTM E399: Specimen was produced CT specimen W=25mm, B=12.5mm, Cross head speed 0.05mm/min in room temperature. Abrasion tester used a pin-on-disk type and a Si₃N₄ ceramic ball which used as machine structural materials. The test condition apply to load of 40N, 60N, 80N a 28.59mm/sec for 6 hours in room temperature. A study was to establish the influence on the fracture toughness of Al_(18)B₄O_(33W) reinforced AC4CH alloy composite mixed different inorganic binder. In addition, the surface was evaluated through the scanning electron micrographs(SEM).
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