SiC繊維強化Al複合材の拡散現象

概要

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If electrical power is transmitted by a power cable made of SiC fiber-reinforced aluminum, Al atoms diffuse into the reinforcement fiber at the transmission temperature. In this study, the diffusion coefficients of Al atoms in Hi-Nicalon^<TM>/Al system and Nicalon^<TM>/Al system were calculated. The outcomes of this study can be summarized as follows:(1)Diffusion coefficient of Al atoms in the Hi-Nicalon^<TM> SiC fiber is 10^<-3> times smaller than that of Nicalon^<TM> SiC fiber at transmission temperature between 300℃ and 600℃. (2)Activation energy Q of Al diffusion in the two different SiC fibers are the same, but frequency factor D_0 of Hi-Nicalon^<TM> SiC fiber is smaller than that of Nicalon^<TM> SiC fiber. (3)Diffusion coefficient of Al in the SiC fiber is related to the microcrystallite of the SiC fiber.
社団法人日本セラミックス協会の論文
1999-05-01