Microwave activated combustion synthesis of porous Al–Ti structures for composite reinforcing

Naplocha, K.; Granat, K.

doi:10.1016/j.jallcom.2009.06.164

Cited by 18 publications

(12 citation statements)

References 22 publications

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“…The results of the research revealed that Ti 3 Al content in TiAl was signifi cantly higher and more consistent for the thermal activation CS samples. Naplocha and Granat have explored possibilities with research on porous Al -Ti materials produced by MACS [43] . The synthesis process was analyzed, as well as structure formation, phase composition, homogeneity degree, and type of porosity.…”

Section: Materials Considerationsmentioning

confidence: 99%

Combustion Synthesis: An Update

Bhaduri

2012

Ceramics and Composites Processing Methods

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Section: Materials Considerationsmentioning

confidence: 99%

Combustion Synthesis: An Update

Bhaduri

2012

Ceramics and Composites Processing Methods

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“…For these two alloys, significant differences in physical properties, such as melting point and heat conductivity, make conventional preparation techniques unsuitable for fabricating Ti/Al joints. Novel methods, such as accumulative roll-bonding [3−5], laser welding-brazing [6−7], friction stir welding [8−9], powder metallurgy [10−11], and explosive cladding [12], were attempted. Despite these efforts, problems still exist with these fabrication methods: (i) poor interfacial bonding strength, (ii) complex processing procedures, and (iii) limited product sizes for industrial application.…”

Section: Introductionmentioning

confidence: 99%

Interfacial microstructure and mechanical properties of Ti−6Al−4V/Al7050 joints fabricated using the insert molding method

Nie

Zhao

et al. 2017

Int J Miner Metall Mater

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Ti−6Al−4V/Al7050 joints were fabricated by a method of insert molding and corresponding interfacial microstructure and mechanical properties were investigated. The interfacial thickness was sensitive to holding temperature during the first stage, and a good metallurgical bonding interface with a thickness of about 90 µm can be obtained at 750°C. X-ray diffraction, transmission electron microscopy, and thermodynamic analyses showed that the interface mainly contained intermetallic compound TiAl 3 and Al matrix. The joints featured good mechanical properties, i.e., shear strength of 154 MPa, tensile strength of 215 MPa, and compressive strength of 283 MPa, which are superior to those of joints fabricated by other methods. Coherent boundaries between Al/TiAl 3 and TiAl 3 /Ti were confirmed to contribute to outstanding interfacial mechanical properties and also explained constant fracture occurrence in the Al matrix. Follow-up studies should focus on improving mechanical properties of the Al matrix by deformation and heat treatment.

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“…These intermetallics have low density, high elastic modulus, and strength at high temperatures, as well as the dimensional stability because of the passive layers resistant to oxidation and corrosion. Several potential applications have been identified for titanium aluminide alloys in aerospace, automotive, and turbine power generation industries [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…r-Al 2 Ti crystallizes into a structure of the tetragonal HfGa 2 type containing 24 atoms per unit cell, and it is a very brittle compound due to the complexity of its crystal structure. The r-Al 2 Ti phase may have the right proportions of Al to Ti that it combines the good oxidation resistance and low density of an Al-rich Ti-Al alloy with the good mechanical and creep properties of Ti-rich Ti-Al alloys [1][2]18]. To the best of our knowledge, no attempt has been made to investigate the in-situ formation of an Al 2 Ti-Al 2 O 3 composite using an Al-TiO 2 thermite system.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of an r-Al2Ti intermetallic matrix composite reinforced with α-Al2O3 ceramic by discontinuous mechanical milling for thermite reaction

Mosleh

Ehteshamzadeh

Mousavian

2014

Int J Miner Metall Mater

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In this study, a powder mixture with an Al/TiO 2 molar ratio of 10/3 was used to form an r-Al 2 Ti intermetallic matrix composite (IMC) reinforced with α-Al 2 O 3 ceramic by a novel milling technique, called discontinuous mechanical milling (DMM) instead of milling and ignition of the produced thermite. The results of energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) of samples with varying milling time indicate that this fabrication process requires considerable mechanical energy. It is shown that Al 2 Ti-Al 2 O 3 IMC with small grain size was produced by DMM after 15 h of ball milling. Peaks for γ-TiAl as well as Al 2 Ti and Al 2 O 3 are observed in XRD patterns after DMM followed by heat treatment. The microhardness of the DMM-treated composite produced after heat treatment was higher than Hv 700.

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Microwave activated combustion synthesis of porous Al–Ti structures for composite reinforcing

Cited by 18 publications

References 22 publications

Combustion Synthesis: An Update

Combustion Synthesis: An Update

Interfacial microstructure and mechanical properties of Ti−6Al−4V/Al7050 joints fabricated using the insert molding method

Fabrication of an r-Al2Ti intermetallic matrix composite reinforced with α-Al2O3 ceramic by discontinuous mechanical milling for thermite reaction

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