Research on a Low Melting Point Al-Si-Cu (Ni) Filler Metal for 6063 Aluminum Alloy Brazing

Peng, Chengyin; Zhu, Deqing; Li, Kaifeng; Du, Xiang; Zhao, Fei; Wan, Mingpan; Tan, Yuanbiao

doi:10.3390/app11094296

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…It is a crucial concern for designing and manufacturing a reliable liquid cold plate to meet the thermal and mechanical design requirements of the CPU/GPU, and these requirements are becoming increasingly stringent. There are four main manufacturing processes for liquid cold plates, including O-ring, 138 brazing, 139,140 stir friction welding (FSW), 141,142 and etch. 143 Copper is the liquid cold plate manufacturing commonly used material.…”

Section: Manufacture and Applicationmentioning

confidence: 99%

Research progress of the liquid cold plate cooling technology for server electronic chips: A review

Zhou

Dong

Sun

et al. 2022

Intl J of Energy Research

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A significant quantity of research has been dedicated to the application of liquid cold plates to eliminate the high heat flux in server electronic chips. Traditional parallel straight microchannel liquid cold plates suffer from low heat flux density with uneven flow distribution, which poses a serious challenge to high-performance server chip heat dissipation. This paper reviews recent research progress in geometry optimization, interrupted structures, channel patterns, and two-phase flow of liquid cold plates. The optimal geometry parameters of rectangular cross-sectional microchannels including the aspect ratio, length, and hydraulic diameter are summarized. Inquest of higher thermal performance, various interrupted structures (ribs, pin fins, etc.), special channel patterns (wavy-shaped, zigzag-shaped, fractal, serpentine, and doublelayered microchannels, etc.), and two-phase flow on the liquid cold plate are applied to promote fluid-turbulivity and increase heat transfer area, meanwhile they lead to more pressure drop. Furthermore, it is an essential approach to commercialize liquid cold plates by applying the academic and prototype of the liquid cold plate to manufacturing and liquid cooling system solutions. In the end, this review provides a discussion about the limitations of current research on liquid cold plates and an outlook on future research directions.

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Section: Manufacture and Applicationmentioning

confidence: 99%

Research progress of the liquid cold plate cooling technology for server electronic chips: A review

Zhou

Dong

Sun

et al. 2022

Intl J of Energy Research

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“…This causes the brittleness of brazing alloys due to the formation of hard IMC Al 2 Cu inside the alloy [11,12]. Pei et al and Peng et al published a study on Al-Cu-Si-Ni fillers with a liquidus temperature lower than 540 • C [13,14], but additional chemical elements led to the formation of a big variety of intermetallic compounds, which could not be predicted and reduced by modern methodologies. Similar to Al-Si alloys, Al-Ge alloys have also been investigated in recent years.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal

Fedorov,

Uhlig,

Wagner

2023

Metals

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Joining aluminum alloys with stainless steel is of great importance in many industrial sectors. Due to the low solidus temperatures of high-strength aluminum alloys, brazing with commercially available filler metals is not possible. Al-Ge-Si filler metals with a lower melting temperature of about 490 °C allow these alloys to be joined. They are manufactured in the form of foil via ultrafast solidification. AA 6082/AISI 304 joints are produced via induction brazing and vacuum furnace brazing. In this study, the tensile shear strength and the fatigue behavior of joints are investigated. Joints produced via induction brazing reached a maximum joining strength of 53 MPa, while vacuum-brazed joints achieved a maximum of 20 MPa. The fracture occurs in the reaction zone, especially inside the Al7Fe2(Si,Cr) intermetallic layer. The results of the fatigue tests show that the joints produced via induction brazing achieved 1 × 107 cycles at a stress amplitude of 7 MPa. Vacuum-brazed joints reached this at a stress amplitude of 3 MPa. All fatigue-tested samples fail in the reaction zone. The high hardness and growth of the SiGe solid solution and the Al7Fe2(Si,Cr) intermetallic layer had a major influence on the joining strength and fatigue behavior of AA 6082/AISI 304-brazed joints.

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“…In the past few years, many related research studies have been conducted to develop low-melting-point filler metal for brazing of aluminum alloys. Based on the eutectic components of Al-Si, Al-Si-Cu, Al-Zn, Al-Mg, Al-Ge, and so on, several alloy systems have been developed to solve the problem of an excessively high brazing temperature with the assistance of the alloying method [ 8 , 9 , 10 , 11 ]. Al-Si alloy is the most widely used brazing filler metal in aluminum heat exchanger production due to its good wettability and forming performance.…”

Section: Introductionmentioning

confidence: 99%

Controlled Atmosphere Brazing of 3003 Aluminum Alloy Using Low-Melting-Point Filler Metal Fabricated by Melt-Spinning Technology

Gao

Qin

2022

Materials

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3003 aluminum alloy was widely used for the manufacturing of heat exchangers in the automotive industry by employing controlled atmosphere brazing (CAB) with NOCOLOK flux brazing technology. However, commercially available filler metals for NOCOLOK flux brazing technology are usually required to be carried out at a relatively high temperature, causing the assembled heat exchanger to be partially molten or easily deformed. A new low-melting-point brazing filler metal Al-5.0Si-20.5Cu-2.0Ni was prepared by using melt-spinning technology and then applied to CAB of 3003 aluminum alloy in this research. The solidus and liquidus of brazing filler metal was 513.21 °C and 532.48 °C. All elements were evenly distributed and free from elemental segregation. The microstructure of brazing filler metal was uniform, and the grain size was less than 500 nm. As the brazing temperature reached 575 °C, the void in the joint disappeared completely. The morphology of CuAl2 was sensitive to the brazing temperature and dwell time. The appearance of net-like CuAl2 brazed at 575 °C for 20 min was more beneficial to improve joint mechanical properties. The leakage rate of the joint was qualified to be 10−10 Pa·m3/s when the brazing temperature was 570 °C or higher. The maximum shear strength of 76.1 MPa can be obtained when the joint was brazed at 575 °C for 20 min. More dwell time induced growth of the interfacial layer and reduced joint shear strength. The open circuit potential and corrosion current density test indicated that the brazing filler metal Al-5.0Si-20.5Cu-2.0Ni had better corrosion resistance than that of 3003 aluminum alloy.

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Research on a Low Melting Point Al-Si-Cu (Ni) Filler Metal for 6063 Aluminum Alloy Brazing

Cited by 13 publications

References 25 publications

Research progress of the liquid cold plate cooling technology for server electronic chips: A review

Research progress of the liquid cold plate cooling technology for server electronic chips: A review

Microstructure and Mechanical Properties of AA 6082/AISI 304 Joints Brazed Using Al-Ge-Si Filler Metal

Controlled Atmosphere Brazing of 3003 Aluminum Alloy Using Low-Melting-Point Filler Metal Fabricated by Melt-Spinning Technology

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