Microstructure and mechanical properties of the AlON / Ti6Al4V active element brazing joint

Li, Chun; Zhang, Kaiping; Mao, Xiaojian; Si, Xiaoqing; Lan, Bo; Liu, Zhan‐Guo; Huang, Yu Dong; Qi, Junlei; Feng, Jicai; Cao, Jian

doi:10.1016/j.msea.2020.139859

Cited by 18 publications

(5 citation statements)

References 25 publications

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“…Taking joining of THB material-metals as an example, given that metals have superior machinability, ductility and high compression strength, THB material-metal hybrid components find multiple potential applications in photovoltaic devices, optical windows for weapons and equipment, and vacuum-sealed connectors [6,7]. A variety of conventional technologies for joining THB materials have been attempted including adhesive bonding [8], anodic bonding [9], solid-state bonding [10], brazing [11] and fusion welding [5]. Nevertheless, most of these methods have intrinsic limitations and shortcomings in offering reliable, solid bonds, such as contamination and aging of the binding agent, thermal mismatch, low accuracy and the necessity for high-temperature heating, which adversely impact the component performance and its operational lifetime.…”

Section: Introductionmentioning

confidence: 99%

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

Jiang

Yang

et al. 2023

Metals

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Transparent hard and brittle (THB) materials have generated significant interest due to their excellent properties, such as wide spectral transmittance, heat resistance, chemical inactivity and high mechanical strength. To further explore the application of THB materials, it is inevitable to be confronted with a range of joining THB materials and THB material–metals. Ultrafast (UF) laser microwelding enables a new means of joining THB materials and THB material–metals, due to a localized energy deposition method, which is dominated by nonlinear absorption. This process can realize high-quality micro-zone direct joining of THB materials or THB material–metals without the assistance of a light-absorbing intermediate layer. In this paper, we review the advances in UF laser microwelding of THB materials and THB material–metals considering the last two decades, from the analysis of the interaction mechanism between UF laser and matter to the key influencing factors and practical applications of this technology. Finally, the existing problems and the future research focus of UF laser microwelding technology of THB materials and THB material–metals are discussed.

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Section: Introductionmentioning

confidence: 99%

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

Jiang

Yang

et al. 2023

Metals

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“…To form a metallurgical bond between metal and ceramic materials has been a challenging task over the past 20 years [ 1 , 2 , 3 , 4 , 5 ]. Dissimilar vacuum brazing is an alternative approach to obtaining a metal-ceramic joint.…”

Section: Introductionmentioning

confidence: 99%

Vacuum Brazing of Metallized YSZ and Crofer Alloy Using 72Ag-28Cu Filler Foil

et al. 2022

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The study focused on dissimilar brazing of metallized YSZ (Yttria-Stabilized Zirconia) and Crofer alloy using BAg-8 (72Ag-28Cu, wt%) filler foil. The YSZ substrate was metallized by sequentially sputtering Ti (0.5/1 μm), Cu (1/3 μm), and Ag (1.5/5 μm) layers, and the Crofer substrate was coated with Ag layers with a thickness of 1.5 and 5 μm, respectively. The BAg-8 filler demonstrated excellent wettability on both metallized YSZ and Crofer substrates. The brazed joint primarily consisted of Ag-Cu eutectic. The metallized Ti layer dissolved into the braze melt, and the Ti preferentially reacted with YSZ and Fe from the Crofer substrate. The globular Fe2Ti intermetallic compound was observed on the YSZ side of the joint. The interfacial reaction of Ti was increased when the thickness of the metallized Ti layer was increased from 0.5 to 1 μm. Both brazed joints were crack free, and no pressure drop was detected after testing at room temperature for 24 h. In the YSZ/Ti(0.5μ)/Cu(1μ)/Ag(1.5μ)/BAg-8(50μ)/Ag(1.5μ)/Crofer joint tested at 600 °C, the pressure of helium decreased from 2.01 to 1.91 psig. In contrast, the helium pressure of the YSZ/Ti(1μ)/Cu(3μ)/Ag(5μ)/BAg-8(50μ)/Ag(5μ)/Crofer joint slightly decreased from 2.02 to 1.98 psig during the cooling cycle of the test. The greater interfacial reaction between the metallized YSZ and BAg-8 filler due to the thicker metallized Ti layer on the YSZ substrate was responsible for the improved gas-tight performance of the joint.

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“…Several technologies have been applied to join dissimilar materials [1]. However, the most reported metal to ceramic joining processes are brazing [8][9][10][11][12] and solid-state diffusion bonding [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Brazing allows successful joints to be obtained between metallic and ceramic base materials as it does not involve melting the base materials, thus reducing the formation of residual stresses [1,2,[8][9][10][11][12]. Nevertheless, the most reported brazing alloys in the literature for brazing Al 2 O 3 to Ti6Al4V are Ag-based alloys which, despite requiring a low processing temperature, promote the formation of (Ag), which compromises the service temperature of the joints [1].…”

Section: Introductionmentioning

confidence: 99%

Joining of Ti6Al4V to Al2O3 Using Nanomultilayers

et al. 2022

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Diffusion bonding of Ti6Al4V to Al2O3 using Ni/Ti reactive nanomultilayers as interlayer material was investigated. For this purpose, Ni/Ti multilayer thin films with 12, 25, and 60 nm modulation periods (bilayer thickness) were deposited by d.c. magnetron sputtering onto the base materials’ surface. The joints were processed at 750 and 800 °C with a dwell time of 60 min and under a pressure of 5 MPa. Microstructural characterization of the interfaces was conducted by scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS), and electron backscatter diffraction (EBSD). The mechanical characterization of the joints was performed by nanoindentation, and hardness and reduced Young’s modulus distribution maps were obtained across the interfaces. The joints processed at 800 °C using the three modulation periods were successful, showing the feasibility of using these nanolayered films to improve the diffusion bonding of dissimilar materials. Using modulation periods of 25 and 60 nm, it was also possible to reduce the bonding temperature to 750 °C and obtain a sound interface. The interfaces are mainly composed of NiTi and NiTi2 phases. The nanoindentation experiments revealed that the hardness and reduced Young’s modulus at the interfaces reflect the observed microstructure.

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Microstructure and mechanical properties of the AlON / Ti6Al4V active element brazing joint

Cited by 18 publications

References 25 publications

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

A Review on Ultrafast Laser Microwelding of Transparent Materials and Transparent Material–Metals

Vacuum Brazing of Metallized YSZ and Crofer Alloy Using 72Ag-28Cu Filler Foil

Joining of Ti6Al4V to Al2O3 Using Nanomultilayers

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