Precipitation and excess solid solubility in MgAlZr and MgZnZr processed by spray atomization and deposition

Lavernia, Enrique J.; Baram, J.; Gutiérrez, Edward A.

doi:10.1016/0921-5093(91)90368-w

Cited by 54 publications

(14 citation statements)

References 25 publications

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“…The grain morphology of the spray deposited materials was equiaxed; this observation is in agreement with previous findings [32,37,64,[99][100][101][102][103][104]. A more thorough discussion of these mechanisms can be found elsewhere [37].…”

Section: Microstructuresupporting

confidence: 81%

“…First, during spray atomization and co-deposition processing the environmental chamber is evacuated to a relatively high mechanical vacuum prior to atomization, resulting in an inert atmosphere suitable for atomizing reactive alloys, such as those based on magnesium [100]. In comparison, during Osprey processing the environment is maintained inert by flushing the atomizing chamber with inert gas.…”

Section: Spray Atomization and Co-deposition Processingmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical Behavior and Processing of Aluminum Metal Matrix Composites

Lavernia¹,

Mohamed²

1992

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Section: Microstructuresupporting

confidence: 81%

Section: Spray Atomization and Co-deposition Processingmentioning

confidence: 99%

Mechanical Behavior and Processing of Aluminum Metal Matrix Composites

Lavernia¹,

Mohamed²

1992

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“…The droplet trajectories are interrupted by a substrate which collects and solidifies the droplets into a coherent, near fully dense deposit. By a continuous movement of the substrate with respect to the atomizer as deposition proceeds, large deposits can be produced in a variety of geometries including tubes and strips [2][3][4] . As-spray formed deposits always contain some inherent porosity (1-10%) and are usually consolidated to full density by extrusion, hot/cold rolling or hot isostatic pressing (HIP).…”

Section: Introductionmentioning

confidence: 99%

“…The powder which was not incorporated in the deposit and was collected in the bottom of the atomization chamber is called overspray powder and is usually about 20 wt. (%) of the starting charge [2][3][4] . Several thermal spray techniques 5 have been used in order to apply Al-Ni intermetallics in the form of thick coatings.…”

Section: Introductionmentioning

confidence: 99%

“…One of the routes indicated to obtain very refined intermetallics in metallic alloys is the spray forming process. Spray forming, also called spray casting or spray deposition, involves the inert gas atomization of a liquid metal stream into variously sized droplets which are then propelled away from the region of atomization by the fast flowing, atomizing gas [2][3][4] . The droplet trajectories are interrupted by a substrate which collects and solidifies the droplets into a coherent, near fully dense deposit.…”

Section: Introductionmentioning

confidence: 99%

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Rapid solidification of an Al-5Ni alloy processed by spray forming

et al. 2012

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Recently, intermetallic compounds have attracted much attention due to their potential technological applications as high-temperature materials. In particular the intermetallic compounds, associated with the Al-Ni binary system stand out as promising candidates for high-temperature materials for the use in harsh environments. It is expected that a bulk Al-Ni alloy may exceed the strength of many commercial materials. The great challenge in developing these alloys is to manipulate the solidification thermal parameters in order to obtain the desired microstructural features. One of the indicated routes to obtain very refined intermetallic phases dispersed in the microstructure is the spray forming process. The dendritic and eutectic growth dependences on cooling rate are already known for directionally solidified (DS) hypoeutectic Al-Ni alloys. In the case of rapidly solidified (RS) samples, extrapolations of such experimental laws are needed, which can be very helpful to estimate realistic values of high cooling rates imposed during the spray forming process. The present study aims to compare directionally solidified and spray-formed Al-5 wt. (%)Ni alloy samples with a view to providing a basis for understanding how to control solidification parameters and the as-cast microstructure. The Al-5.0 wt. (%)Ni alloy was shown to have a cellular morphology for the overspray powder size range examined (up to 500 µm). The mean cell spacing decreased from 5.0 to 1.1 µm with the decrease in the powder average diameter. It was found that the experimental cooling rates imposed during the atomization step of the overspray powder solidification varied from 10 3 to 2.10 4 K/s. The DSC trace depicted a crystallization peak of an amorphous structure fraction in the smallest Al-5.0 wt. (%)Ni alloy powder size range (<32 µm) estimating a 15 µm critical diameter of amorphous powder in the binary Al 97.5 Ni 2.5 (at%) alloy.

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Metal‐Matrix Composites

Chawla

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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(New Mexico Institute of Mining and Technology). Metal‐matrix composites have a metal or an alloy as the continuous phase, in which the reinforcing phase (particle whisker, short or continuous fiber) is distributed. Important techniques for processing metal‐matrix composites are described. A description of the reinforcement/matrix interface region and its characteristics, and properties of different metal‐matrix composites are provided. Different applications of metal‐matrix composites are summarized.

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Precipitation and excess solid solubility in MgAlZr and MgZnZr processed by spray atomization and deposition

Cited by 54 publications

References 25 publications

Mechanical Behavior and Processing of Aluminum Metal Matrix Composites

Mechanical Behavior and Processing of Aluminum Metal Matrix Composites

Rapid solidification of an Al-5Ni alloy processed by spray forming

Metal‐Matrix Composites

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