Effect of Zn and mechanical vibration agitation on the microstructure evolution in brazed joint of SiC particle-reinforced aluminum matrix composites

Chen, Biqiang; Zhang, Guifeng

doi:10.1007/s40194-019-00789-y

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…Additionally, it is hard to find a filler metal that can satisfactorily wet the base aluminum and SiC simultaneously. The current SiCp/Al MMCs brazing process has several disadvantages, such as work being performed under vacuum or controlled atmospheres, use of high temperature, and the use of polluting fluxes [20][21][22].…”

Section: Methodsmentioning

confidence: 99%

Flux-Free Diffusion Joining of SiCp/6063 Al Matrix Composites Using Liquid Gallium with Nano-Copper Particles in Atmosphere Environment

et al. 2020

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A new method for flux-free diffusion joining of aluminum matrix composites reinforced with SiC particles (SiCp/Al MMCs) in atmosphere environment has been developed. Liquid gallium and nano-copper particles were employed as filler metal under joining temperatures ranging between 400 °C to 480 °C, with a holding time of 2 h and pressure of 3 MPa. The results showed that 65 vol.% SiCp/6063 Al MMCs were successfully joined together. X-ray diffraction (XRD) analysis confirmed the presence of Ga2O3 at the fracture. Meanwhile, neither copper oxide nor aluminum oxide was detected. The formation of Ga2O3 can protect nano-copper particles and SiCp/6063 Al MMCs from oxidation. The width of weld seam tended to be narrowed from 40 μm to 14 μm gradually with increasing temperature from 400 °C to 480 °C. The maximum shear strength level of 41.2 MPa was achieved with a bonding temperature of 450 °C. The change of the strength was due to the adequate elements’ mutual diffusion and solution, as well as the change of the quantity and morphology of intermetallic compounds in the weld seam, such as Al2Cu and Cu3Ga. When the diffusion joining temperature reached 440 °C or above, the leak rate of the specimen remained under 10−10 Pa·m3/s.

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Section: Methodsmentioning

confidence: 99%

Flux-Free Diffusion Joining of SiCp/6063 Al Matrix Composites Using Liquid Gallium with Nano-Copper Particles in Atmosphere Environment

et al. 2020

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“…As the chemical properties of silicon carbide particles are quite different with the base aluminum alloy, the joining of SiC p /Al MMCs has been a difficult point. Joining methods for SiC p /Al MMCs include flux-free diffusion joining [ 4 ], transient liquid phase bonding (TLP) [ 9 ], vacuum brazing [ 10 ], ultrasonic brazing [ 11 ], friction stir welding [ 3 ], mechanical vibration agitation brazing [ 12 , 13 ] and semi-solid welding [ 14 , 15 ], etc. Among the above-mentioned joining methods, brazing has good joining effect and economic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Joining of Hypereutectic Al-50Si Alloys Using Lead-Free Brazing Filler Glass in Air

Wang

Gao

et al. 2020

Materials

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Hypereutectic Al-Si alloys are attractive materials in the fields of electronic packaging and aerospace. A Bi2O3-ZnO-B2O3 system lead-free brazing filler glass was employed to braze hypereutectic Al-50Si alloys in air. The hypereutectic Al-50Si alloys were pre-oxidized and the low-temperature glass powder was flake-shaped in the brazing process. The effects of brazing temperature and time on joints microstructure evolution, resulting mechanical strength, and air tightness were systematically investigated. The results indicated that the maximum shear strength of the joint was 34.49 MPa and leakage rate was 1.0 × 10−10 Pa m3/s at a temperature of 495 °C for 30 min. Crystalline phases, including Bi24B2O39 and Bi2O3, were generated in the glass joint. The formation of a diffusion transition layer with a thickness of 3 μm, including elements of Al, Si, Zn, Bi, Na, and B, was the key to form an effective joint. The elements of Al, Si, and Bi had a short diffusion distance while the elements of Zn, Na, and B diffused in a long way under brazing condition.

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Effect of Zn and mechanical vibration agitation on the microstructure evolution in brazed joint of SiC particle-reinforced aluminum matrix composites

Cited by 2 publications

References 20 publications

Flux-Free Diffusion Joining of SiCp/6063 Al Matrix Composites Using Liquid Gallium with Nano-Copper Particles in Atmosphere Environment

Flux-Free Diffusion Joining of SiCp/6063 Al Matrix Composites Using Liquid Gallium with Nano-Copper Particles in Atmosphere Environment

Joining of Hypereutectic Al-50Si Alloys Using Lead-Free Brazing Filler Glass in Air

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