Microstructure and mechanical properties of Al 2 O 3 ceramic and TiAl alloy joints brazed with Ag–Cu–Ti filler metal

Niu, Guodong; Wang, D.P.; Yang, Zhenwen; Wang, Y.

doi:10.1016/j.ceramint.2016.01.078

Cited by 74 publications

(31 citation statements)

References 28 publications

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“…The development of reliable joining of Al 2 O 3 to metals is crucially important to extend their use, particularly in aerospace and nuclear applications [63]. For instance, reliable bonding of titanium alloys, such as TiAl [22][23][24] or Ti6Al4V [25,26], or even steel [64] and Al 2 O 3 , can take advantage of the respective superiorities of ceramics and metals, and thereby extend their scopes of application.…”

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

“…The addition of W particles on the composite filler seems to act as a release of residual stresses formed during cooling. The increase of the brazing temperature led to an increase of the thickness of the reaction layers composed by Ti 3 (Cu,Al) 3 alloys, such as TiAl [22][23][24] or Ti6Al4V [25,26], or even steel [64] and Al2O3, can take advantage of the respective superiorities of ceramics and metals, and thereby extend their scopes of application. The fundamental problem of brazing an oxide ceramic is a resistance to wetting by the presence of the oxides on the surface.…”

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

“…The increase of the brazing temperature led to an increase of the thickness of the reaction layers composed by Ti3(Cu,Al)3O and AlCu2Ti, reflecting a reduction in the values of shear strength. Niu et al [23] evaluated the possibility of brazing a TiAl alloy to Al 2 O 3 ceramic with Ag-27.5Cu-2.5Ti and Ag-28Cu filler metals with varying amounts of TiH 2 . The base materials were brazed at temperatures ranging from 840 to 940 • C with holding time ranging from 0 to 30 min in a vacuum furnace.…”

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

“…The reaction layers composed by AlCu 2 Ti and Ti 3 (Cu,Al) 3 O are strongly influenced by the Ti content of the filler metal, as can be seen on the scanning electron microscopy (SEM) images of Figure 2. Niu et al [23] evaluated the possibility of brazing a TiAl alloy to Al2O3 ceramic with Ag-27.5Cu-2.5Ti and Ag-28Cu filler metals with varying amounts of TiH2. The base materials were brazed at temperatures ranging from 840 to 940 °C with holding time ranging from 0 to 30 min in a vacuum furnace.…”

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

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Recent Progress in the Joining of Titanium Alloys to Ceramics

Simões

2018

Metals

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The prospect of joining titanium alloys to advanced ceramics and producing components with extraordinary and unique properties can expand the range of potential applications. This is extremely attractive in components for the automotive and aerospace industries where combining high temperature resistance, wear resistance and thermal stability with low density materials, good flowability and high oxidation resistance is likely. Therefore, a combination of distinct properties and characteristics that would not be possible through conventional production routes is expected. Due to the differences between the coefficients of thermal expansion (CTE) and Young's modulus of metals and ceramics, the most appropriate methods for such dissimilar bonding are brazing, diffusion bonding, and transient liquid phase (TLP) bonding. For the joining of titanium alloys to ceramics, brazing appears to be the most promising and cost-effective process although diffusion bonding and TLP bonding have clear advantages in the production of reliable joints. However, several challenges must be overcome to successfully produce these dissimilar joints. In this context, the purpose of this review is to point out the same challenges and the most recent advances that have been investigated to produce reliable titanium alloys and ceramic joints. for next-generation aircraft turbine engines [1][2][3][4]. Though, the development of bonding techniques especially to successfully produce dissimilar joints is the key to overcoming the poor room-temperature ductility and fracture toughness of these alloys that limit these potential applications.The possibility of combining the extraordinary properties of these titanium alloys with other materials such as nickel-based superalloys, steel, or even ceramics through dissimilar bonding can allow the development of components not only with complex geometries but also with a combination of properties exceeding the limitations of these materials when used individually.Advanced ceramics have attractive properties, such as high wear resistance, high thermal stability as well as high thermal and electrical conductivities. It is known that some of the advanced ceramics like alumina, silicon nitride, and zirconia, are also well established in the electronics, aerospace, nuclear, and automotive industries [19,20]. However, their inherent brittleness, high cost, and high hardness limit the production of large and complex shape components. The successful application of these advanced ceramics depends strongly on the joining of these materials with metals. In addition, the possibility to combine properties as high wear resistance and high thermal stability with low density, high temperature properties, and excellent creep and corrosion resistance could enable the production of more advanced components that better meet the high requirements of several industrial sectors [21].The most suitable methods for bonding metals and ceramics and producing successful joints with appreciated properties are brazing , diffusion bonding...

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Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

Section: Brazing Of Titanium Alloys To Aluminamentioning

confidence: 99%

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Recent Progress in the Joining of Titanium Alloys to Ceramics

Simões

2018

Metals

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“…It should be noted that the reaction layer consists of ZrO 2 oxide and α-Cu alternating between these two phases. In contrast, the interfacial microstructure using a Ti-containing brazing filler metal has continuous and flat Ti 2 O or Ti 3 Cu 3 O reaction layers at the Al 2 O 3 interface [14,27]. This difference is considered to be because that Ti-containing alloys has better wettability with the lower contact angles on the Al 2 O 3 rather than Zr-containing one [18].…”

Section: Nomentioning

confidence: 99%

Formation of Interfacial Reaction Layers in Al2O3/SS 430 Brazed Joints Using Cu-7Al-3.5Zr Alloys

Heo

Joung

Jung

et al. 2018

Metals

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The formation of interfacial reaction layers was investigated in an α-Al2O3/430 stainless steel (SS430) joint brazed using a Cu-7Al-3.5Zr active brazing alloy. Brazing was conducted at above its eutectic temperature of 945 °C and below liquidus 1045 °C, where liquid and solid phases of the brazing alloys coexists. At 1000 °C, the liquid phase of the brazing alloy was wet onto the α-Al2O3 surface. Zr in the liquid phase reduced α-Al2O3 to form a continuous ZrO2 layer. As the dwell time increased, Zr in the liquid phases near α-Al2O3 interface was used up to thicken the reaction layers. The growth kinetics of the layer obeys the parabolic rate law with a rate constant of 9.25 × 10−6 cm·s−1/2. It was observed that a number of low yield strength Cu-rich particles were dispersed over the reaction layer, which can release the residual stress of the joint resulting in reduction of crack occurrence.

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Novel Ceramic‐Based Material for the Applications of Molded Interconnect Devices (3D‐MID) Based on Laser Direct Structuring

et al. 2018

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Molded interconnect devices (MID) based on laser direct structuring LPKF‐LDS® technology are widely used in the realm of electronics. Nowaday, design and development of new materials with improved properties for 3D‐MID are in focus. In this work, novel materials based on alumina ceramic with copper oxide additives are developed for this technology. The effect of the sintering temperature and the doping amount of copper oxide on the metallization quality is investigated. Furthermore, the influence of laser process parameters (e.g., laser power, velocity’, and frequency) on process output namely groove dimensions, groove profile, characteristics of structured area, and quality of the final 3D‐MID products are discussed. The novel ceramic materials show high flexibility to realize very fine structures. Moreover, the laser‐structured and metallized area shows a free edge lap with good quality. After metallization high accuracy with copper line/pitch of 16 μm/20 μm is achieved.

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Microstructure and mechanical properties of Al 2 O 3 ceramic and TiAl alloy joints brazed with Ag–Cu–Ti filler metal

Cited by 74 publications

References 28 publications

Recent Progress in the Joining of Titanium Alloys to Ceramics

Recent Progress in the Joining of Titanium Alloys to Ceramics

Formation of Interfacial Reaction Layers in Al2O3/SS 430 Brazed Joints Using Cu-7Al-3.5Zr Alloys

Novel Ceramic‐Based Material for the Applications of Molded Interconnect Devices (3D‐MID) Based on Laser Direct Structuring

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