Long Term Thermal Stability of Silicide Dispersoids in Rapidly Solidified Al-Fe-V-Si and Related Alloys

In this work, Al-11Fe, Al-7Fe-4Ni and Al-7Fe-4Cr (in wt. %) alloys were prepared by combination of casting and hot extrusion. Microstructures of as-cast alloys were composed of aluminium matrix with large and coarse intermetallics such as Al13Fe4, Al13Cr2 and Al5Cr. Subsequently, as-cast alloys were rapidly solidified by melt-spinning technique which led to the supersaturation of solid solution alloying elements. These rapidly solidified ribbons were milled and compacted by hot-extrusion method. Hot-extrusion caused that microstructures of all alloys were fine with uniform dispersed particles. Moreover, long-term thermal stability was tested at temperature 300 °C for as-cast and hot-extruded alloys and chromium was found to be the most suitable element for alloying to improve thermal stability.

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Structure and Properties of PM Nano-Crystalline Al-Cr based Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.567-568.197 ◽

2007 ◽

Vol 567-568 ◽

pp. 197-200

Author(s):

Dalibor Vojtěch ◽

Alena Michalcová ◽

Jan Verner ◽

Jan Šerák ◽

František Šimančík ◽

...

Keyword(s):

Thermal Stability ◽

Elevated Temperature ◽

Tensile Tests ◽

Paper Properties ◽

Excellent Thermal Stability ◽

Nano Crystalline ◽

Rapidly Solidified ◽

Thermal Stability Of ◽

Powder Fraction

In the presented paper, properties of Al-Cr-Fe-Ti alloy produced by powder metallurgy (PM) are described. Rapidly solidified powder alloy was prepared by the pressure nitrogen melt atomization. The granulometric powder fraction of less than 45 μm was then hot-extruded. Microstructure of the as-extruded material comprised recrystallized α-Al grains and spheroids of intermetallic phases. Tensile strength of the investigated material was similar to that of a conventional casting Al-Si alloy commonly used in elevated temperature applications. Excellent thermal stability of the PM Al-Cr based material, which much exceeded the elevated temperature casting alloy, was proved by room temperature tensile tests after long-term annealing at elevated temperature. Reasons for the observed thermal stability of the investigated PM alloy are discussed.

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Co‐Evaporated MAPbI 3 : Excellent Intrinsic Long‐Term Thermal Stability of Co‐Evaporated MAPbI 3 Solar Cells at 85 °C (Adv. Funct. Mater. 22/2021)

Advanced Functional Materials ◽

10.1002/adfm.202170155 ◽

2021 ◽

Vol 31 (22) ◽

pp. 2170155

Author(s):

Herlina Arianita Dewi ◽

Jia Li ◽

Hao Wang ◽

Bhumika Chaudhary ◽

Nripan Mathews ◽

...

Keyword(s):

Thermal Stability ◽

Solar Cells ◽

Thermal Stability Of

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Long-term thermal stability of Equal Channel Angular Pressed 2024 aluminum alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2016.09.048 ◽

2016 ◽

Vol 677 ◽

pp. 307-315 ◽

Cited By ~ 6

Author(s):

Güher Tan ◽

Y. Eren Kalay ◽

C. Hakan Gür

Keyword(s):

Thermal Stability ◽

Aluminum Alloy ◽

2024 Aluminum Alloy ◽

Thermal Stability Of

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Model-free kinetics applied to evaluate the long-term thermal stability of three [NTf2] anion-based ionic liquids

Thermochimica Acta ◽

10.1016/j.tca.2017.08.002 ◽

2017 ◽

Vol 656 ◽

pp. 70-84 ◽

Cited By ~ 2

Author(s):

D. Blanco ◽

P. Oulego ◽

D. Ramos ◽

B. Fernández ◽

J.M. Cuetos

Keyword(s):

Thermal Stability ◽

Ionic Liquids ◽

Model Free ◽

Model Free Kinetics ◽

Thermal Stability Of

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Changes in thermal stability of lignocelluloses waste aggregates long-term incorporated in composite

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/900/1/012042 ◽

2021 ◽

Vol 900 (1) ◽

pp. 012042

Author(s):

N Stevulova ◽

A Estokova

Keyword(s):

Thermal Stability ◽

Alkaline Treatment ◽

Cement Matrix ◽

Scanning Calorimetry ◽

Alkali Ions ◽

Thermal Gravimetry ◽

Pre Treatment ◽

Surface Modified ◽

Thermal Stability Of

Abstract This paper is addressed to comparative study of changes in thermal stability of surface-modified hemp-hurds aggregates long-term incorporated in bio-aggregate-based composites with the original ones before their integration into alternative binder matrix. In this study, the effectiveness of alkaline treatment of hemp hurds compared to the raw bio-aggregates as well as in relation to their behaviour when they are long-term incorporated in the MgO-cement environment is investigated. The differences in the thermal behaviour of the samples are explained by the changed structure of hemp hurds constituents due to the pre-treatment and long-term action of the alternative binder components on the bio-aggregates. Alkaline treatment increases thermal stability of hemp hurds compared to raw sample. Also long-term incorporation of hemp hurds in MgO-cement matrix had a similar effect in case of alkaline modified bio-aggregates. The more alkali ions present in the structure of hemp hurdssamples, the more ash is formed during their thermal decomposition studied by thermal gravimetry (TG) and differential scanning calorimetry (DSC).

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