In situ processing of dense Al2O3–Ti aluminide interpenetrating phase composites

Horvitz, Dror; Готман, И.; Gutmanas, E.Y.; Claussen, Nils

doi:10.1016/s0955-2219(01)00396-x

Cited by 113 publications

(67 citation statements)

References 21 publications

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“…This means that the formation of Al 2 O 3 as in situ phase in molten Al becomes less feasible. As a matter of fact, in situ Al 2 O 3 dispersion in liquid Al by stir casting technique is not reported; however, studies are available in Al-oxide powder compacts and infiltration of pure aluminum in oxide preforms (Ref 13,14).…”

Section: Introductionmentioning

confidence: 99%

Prospects of In-Situ α-Al2O3 as an Inoculant in Aluminum: A Feasibility Study

Sreekumar

Babu

Eskin

2017

J. of Materi Eng and Perform

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In-situ a-Al 2 O 3 was successfully synthesized and dispersed in Al alloy using B 2 O 3 and ultrasonication-aided liquid mixing technique. Microstructure analysis identified a-Al 2 O 3 as the most common phase in the composite master alloy, whereas AlB 12 was frequently observed and AlB 2 was rarely found in the alloy. Grain refinement analysis of selected Al alloys registered a transition of columnar to equiaxial grains of aAl with the inoculation of the master alloy and ultrasonication treatment. Similarly, an improvement in the mechanical properties of A357 alloy was observed with the combination of inoculation and ultrasonication treatment.

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Section: Introductionmentioning

confidence: 99%

Prospects of In-Situ α-Al2O3 as an Inoculant in Aluminum: A Feasibility Study

Sreekumar

Babu

Eskin

2017

J. of Materi Eng and Perform

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“…Also they are formed as interfacial products on any solid oxygen source (i.e., oxides) inside the molten Al [12]. The oxides such as SiO 2 , TiO 2 , B 2 O 3 were found to be prone for reaction with Al at any experimental condition [13][14][15]. A few studies were made on the possibility of converting these oxides into in-situ Al 2 O 3 or MgAl 2 O 4 particles in an Al alloy [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The oxides such as SiO 2 , TiO 2 , B 2 O 3 were found to be prone for reaction with Al at any experimental condition [13][14][15]. A few studies were made on the possibility of converting these oxides into in-situ Al 2 O 3 or MgAl 2 O 4 particles in an Al alloy [14,15]. However, complete reaction of parent oxide and dispersion of these insitu particles in Al are yet to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Structure–property analysis of in-situ Al–MgAl2O4 metal matrix composites synthesized using ultrasonic cavitation

Sreekumar

Babu

Eskin

et al. 2015

Materials Science and Engineering: A

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In-situ Al-MgAl 2 O 4 metal matrix composite was successfully manufactured using SiO 2 with the aid of ultrasonication. MgAl 2 O 4 particles and their clusters were identified at grain boundaries and interdendritic regions within the grain envelopes. The composite showed 2-5 fold of grain size reduction with respect to the reference alloy cast at similar conditions. The composite has shown 10% increase in yield stress and 15% increase in UTS while maintaining the ductility similar to reference alloy. CTE mismatch strengthening and grain boundary strengthening are suggested to be influencing in the improvement in mechanical properties.

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“…However, its applications as structural material have been limited principally by its low fracture toughness. Al 2 O 3 ceramics can be toughened with the incorporation of fine metallic particles [1], for this reason it has been prepared successfully some Al 2 O 3 -systems by different techniques such as: pressure-assisted thermal explosion [2], slip casting [3], metal infiltration [4][5][6], sintering high pressing [7], Chemical deposition [8], self-propagation high temperature synthesis [9] and reaction synthesized [10]. Nevertheless, most of these processes are costly and they are very complex in their procedures and control.…”

Section: Introductionmentioning

confidence: 99%

Alumina-Based Composites Reinforced with Silver Particles

Rocha–Rangel¹

2013

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Al 2 O 3 /Ag composite ceramics were fabricated by the use of mechanical milling and pressureless sintering.Al 2 O 3 + 10 wt.% Ag were mixed and milled during 12 h at 300 rpm in a horizontal mill, then with the powder mixture it was conformed cylindrical samples by uniaxial pressing using 300 MPa. The pressed samples were sintered during 1 h in an electrical furnace at 1300, 1400 and 1500°C respectively. Sinter was performed using an argon atmosphere inside the furnace in order to inhibit silver oxidation. XRD results established that silver retains its crystalline structure. On the other hand, density of samples is better with increments in temperature. However, the final relative density is small and about of 91%. Scanning electron microscopy observations show alumina's microstructure with very fine and homogeneous distributions of silver particles. Increments in sintering temperature are reflected as enhancements of the density and consequently of the fracture toughness of the Al 2 O 3 /Ag composite ceramics.

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In situ processing of dense Al2O3–Ti aluminide interpenetrating phase composites

Cited by 113 publications

References 21 publications

Prospects of In-Situ α-Al2O3 as an Inoculant in Aluminum: A Feasibility Study

Prospects of In-Situ α-Al2O3 as an Inoculant in Aluminum: A Feasibility Study

Structure–property analysis of in-situ Al–MgAl2O4 metal matrix composites synthesized using ultrasonic cavitation

Alumina-Based Composites Reinforced with Silver Particles

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