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Reactive diffusion bonding of SiCp/Al composites by insert layers of mixed Al-Si and Al-Si-SiC powders

Journal of University of Science and Technology Beijing 2005年第5期12卷 445-449页

作者： jihua huang yueling dong yun wan jiangang zhang hua zhang Materials Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

Mixed Al-Si and Al-Si-SiC powders were employed as insert layers to reactive diffusion bond SiCp/6063 MMC （metal matrix composites）. The results show that SiCp/6063 MMC joints bonded by the insert layer of the mixed Al-Si powder have a dense joining layer with a typical hypoeutectic microstructtn＇e. Using the mixed Al-Si-SiC powder as the insert layer, SiCp/6063 MMC can be reactive diffusion bonded by a composite joint. Because of the SiC segregation, however, there are a number of porous zones in the joining layer, which results in the bad shear strength of the joints reactive diffusion bonded by the insert layer of the mixed A1-Si- SiC powder, even lower than that of the joints reactive diffusion bonded by the insert layer of the mixed Al-Si powder. Ti and Mg added in the insert layers obviously improve the strength of the joints reactive diffusion bonded by the insert layer of the mixed Al- Si-SiC powder, especially, Mg has a more obvious effect.

关键词： reactive diffusion bonding insert layer SiCp/Al MMCs

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Reactive Diffusion Bonding of SiCp/Al Composites by Insert Powder Layers with Eutectic Composition

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Journal of Materials Science & Technology 2005年第5期21卷 779-781页

作者： jihua huang yueling dong, jiangang zhang, yun wan and Guoan ZHOUSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Mixed Al-Si and Al-Cu powders were investigated as insert layers to reactive diffusion bond SiCp/6063 metal matrix composite （MMC）. The results show that SiCp/6063 MMC joints bonded by the insert layers of the mixed Al-Si and Al-Cu powders have a dense joining layer of high quality. The mass transfer between the bonded materials and insert layers during bonding leads to the hypoeutectic microstructure of the joining layers bonded by both the mixed Al-Si and Al-Cu powders with eutectic composition. At fixed bonding time （temperature）, the shear strength of the joints by both insert layers of the mixed Al-Si and Al-Cu powders increases with increasing the bonding temperature （time）, but get maxima at bonding temperature 600℃ （time 90 min）.

关键词： Reactive diffusion bonding Insert powder layer SiCp/Al metal matrix composites

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