SiC fiber reinforced pure aluminum composite, tensile material property, high temperature tensile strength, transverse strength, metal matrix composite, specific stiffness, power transmission system, low oxygen silicon carbide fiber, high temperature dumbbell shaped specimen, fiber orientation
その他のタイトル（英）
Tensile material properties and high temperature tensile strength of SiC fiber reinforced pure aluminum composites
With their excellent high-temperature properties and high specific stiffness and strength, Metal Matrix Composites (MMC) find broad applications not only in the aerospace industry, but also in other engineering fields. In this paper, the tensile properties of SiC fiber reinforced pure aluminum, which has potential applications in power transmission systems, were experimentally evaluated in the temperature range from RT (Room Temperature) to 515 C. Hi-Nicalon (sup TM) low-oxygen silicon carbide fibers recently developed by Nippon Carbon were used to unidirectionally reinforce 99.9 percent pure aluminum (Al090). These specimens had a rectangular or dumbbell shape. The rectangular specimens were used for room temperature testing, in which SiC fibers were aligned in 0 deg or 90 deg directions to the tensile loading. The dumbbell-shaped specimens, reinforced in the 0 deg direction, were used for high-temperature testing. Prior to the high-temperature experiments, a 3D FEM (Field Emission Microscope) analysis was performed to ensure that no unwanted stress concentration existed in the dumbbell specimens. The mechanical properties of the material, i.e. Young's modulus, Poisson's ratio, strength and elongation, were measured and summarized in figures or tables. These data were compared with published data for Nicalon fiber reinforced aluminum, and it was found that the present Hi-Nicalon SiC/Al material is better reinforced in the fiber direction. On the other hand, the transverse strength of this material is lower due to matrix (99.9 percent pure Al) yielding. In the experimental temperature range, strength of the material decreases linearly with the increase in temperature.
SiC繊維強化/純アルミニウム複合材料の引張材料特性と高温引張強度
naltr0001419.pdf
(3.75MB)
