발간논문

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Vol.11, No.2, 158 ~ 165, 1973
Title
Effect of Ultrasonic waves on the Refining of Primary Silicon Crystals in Hypereutectic Al - Si Alloy
권혁무 , 장충근 , 김수영 Hyunk Moo Kwon , Choong Kun Chang , Soo Young Kim
Abstract
Hyper-eutectic Al-Si alloys were irradiated with ultrasonic waves (24KHz) to investigate the refining effects of primary silicon crystals. The relationship between the refining rate and irradiation, and the unstability and fading have been studied at the several temperature ranges and the following results were obtained : 1) The grain sizes of primary silicon crystals have been refined about the half of the orginal size and stabilized more by ultrasonic wave irradiations. 2) The most efficient temperature of melts for the irradiation was 100℃ higher than the melting point of the sample.
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