Mechanical milling of Ti–Ni–Si filler metal for brazing TiAl intermetallics

Cao, Jian; He, Peng; Wang, M.

doi:10.1016/j.intermet.2011.01.017

Cited by 22 publications

(9 citation statements)

References 22 publications

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“…Figure 10 presents the micrograph obtained by SEM for the porous tungsten and molybdenum brazed at 1400 °C for 5 minutes, where (a) is the Mo phase, (b) Ni-Mo alloy, and (c) the porous tungsten. From Figure 10 it can be noticed that the brazing process done at 1400 °C for 5 minutes was suitable to melt the filler material (Ni-Mo alloy), to wet the surfaces of porous tungsten and molybdenum, and consequently to obtain an efficient bonding free of relevant structural damages and defects 16 . The chemical composition for the numbered spots from 1 to 8 ( Figure 11) was determined by EDS coupled to the SEM.…”

Section: Structural Characterization By X-ray Diffractionmentioning

confidence: 99%

Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology

Sene

Motta

2013

Mat. Res.

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A brazing process based on Ni-Mo alloy was developed to join porous tungsten cathode bottom and dense molybdenum cathode body for microwave tubes manufacture. The Ni-Mo alloy was obtained by mixing and milling powders in the eutectic composition, and applied on the surface of the components. The brazing was made at 1400 °C by using induction heating in hydrogen for 5 minutes. Alumina surfaces were coated with the binder and analyzed by Energy Dispersive X-rays Fluorescence. The brazed samples were analyzed by Scanning Electron Microscopy coupled to Energy Dispersive Spectroscopy. Stress-strain tests were performed to determine the mechanical behavior of the joining. The quality of the brazing was evaluated by assuring the presence of a "meniscus" formed by the Ni-Mo alloy on the border of the tungsten and molybdenum joint, the absence of microstructural defects in the interface between the tungsten and molybdenum alloys, and the adhesion of the brazed components.

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Section: Structural Characterization By X-ray Diffractionmentioning

confidence: 99%

Synthesis and characterization of Ni-Mo filler brazing alloy for Mo-W joining for microwave tube technology

Sene

Motta

2013

Mat. Res.

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“…Considerable attention has been paid to welding and joining of titanium aluminides, which consisted of γ-TiAl [ 14 , 15 ] and α 2 -Ti 3 Al [ 16 , 17 ] based alloys, to themselves and to other materials. Titanium aluminide joints have been fabricated by means of numerous approaches including fusion welding [ 18 , 19 , 20 ], brazing [ 21 , 22 ], diffusion bonding [ 23 , 24 ], friction welding [ 25 , 26 ] and reactive joining [ 27 , 28 ]. All these methods present their unique advantages and disadvantages in joining titanium aluminides, and are suitable for specific applications.…”

Section: Introductionmentioning

confidence: 99%

Welding and Joining of Titanium Aluminides

Cao

Song

et al. 2014

Materials

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Welding and joining of titanium aluminides is the key to making them more attractive in industrial fields. The purpose of this review is to provide a comprehensive overview of recent progress in welding and joining of titanium aluminides, as well as to introduce current research and application. The possible methods available for titanium aluminides involve brazing, diffusion bonding, fusion welding, friction welding and reactive joining. Of the numerous methods, solid-state diffusion bonding and vacuum brazing have been most heavily investigated for producing reliable joints. The current state of understanding and development of every welding and joining method for titanium aluminides is addressed respectively. The focus is on the fundamental understanding of microstructure characteristics and processing–microstructure–property relationships in the welding and joining of titanium aluminides to themselves and to other materials.

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“…The Ag-Cu-Ti powder fabricated by mechanical milling was used to study the effect of Ti content on the joining of Invar/SiO 2 -BN. Meanwhile, TiH 2 powders were applied to replace Ti in the filler metal, because Ti powders tend to be oxidized during mechanical milling [21]. TiH 2 powders with an average size of 50 mm were added into Ag-28Cu (wt%) filler alloy powders (average size of 50 mm) to change the Ti content in the filler metal.…”

Section: Methodsmentioning

confidence: 99%