| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 102 === This study of transient liquid phase of diffusion bonding of 6061 alloy with pure Zinc filler is successfully bonded. The bonding temperature of the process was adjusted at 420℃, 450℃ and 480℃ for 1 hour and 2 hours separately. Meanwhile, we did T6 heat treatment of 6061 alloy for the specimens. Afterwards, we investigated the influence on mechanical characteristics and the morphology of the joints. The results indicate that the primary interfacial reaction layer is composed of Al-Zn or Al-Zn-Mg solid solution.
At lower bonding temperature, the bonding zone will form the defects easier, therefore when the joints get T6 heat treatment, the defect will be deteriorated by moisture or oxygen let the mechanical characteristics of the joints reduce, instead the higher bonding temperature can let the defects lower, and get T6 heat treatment, the strength and hardness of the joints will be stronger. When the bonding conditions were controlled at 480℃ for 2 hours, its highest strength is reached 28.21 MPa and the strength after T6 heat treatment is 48.15 MPa.
Cold-plate is one of the most important elements of liquid cooling system, because Cold-plate element contacts the processing chip straightly, so it requires good sealing ability and high heat transfer. Currently, the development of Cold-plate has been limited to the machining technology, lead to the performance and reliability of the products cannot be improved.
To ameliorate the above problems, we use transient liquid phase of diffusion bonding process in our development of Cold-plate, and design “Stacked Cold-plate,” through insert sheet-type channel let internal chamber be divided into two layers. In this research there are three types for bottom layer channel is respectively Pillar-type(P), Fin-type(F) and W-shape-type(W), and with suitable top layer channel. In order to compare the performance of heat transfer, flow field and optimum design, these channels was conducted by simulation software, ICEPAK.
Finally, we actually manufacture optimum Cold-plate designs of the three by CAD/CAM, and let upper sheet, bottom sheet and inner sheet-type channel integrally molded by diffusion process ,afterwards measure the thermal properties to verify with the simulation results.
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