scholarly journals Mechanical and Thermal Properties of Low-Density Al20+xCr20-xMo20-yTi20V20+y Alloys

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 278 ◽  
Author(s):  
Uttam Bhandari ◽  
Congyan Zhang ◽  
Shizhong Yang
Keyword(s):  
Thermal Properties ◽  
Density Functional ◽  
Cell Model ◽  
High Hardness ◽  
Dft Method ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
High Entropy ◽  
Bcc Structure ◽  
Temperature Application

Refractory high-entropy alloys (RHEAs) Al20+xCr20-xMo20-yTi20V20+y ((x, y) = (0, 0), (0, 10), and (10, 15)) were computationally studied to obtain a low density and a better mechanical property. The density functional theory (DFT) method was employed to compute the structural and mechanical properties of the alloys, based on a large unit cell model of randomly distributed elements. Debye–Grüneisen theory was used to study the thermal properties of Al20+xCr20-xMo20-yTi20V20+y. The phase diagram calculation shows that all three RHEAs have a single body-centered cubic (BCC) structure at high temperatures ranging from 1000 K to 2000 K. The RHEA Al30Cr10Mo5Ti20V35 has shown a low density of 5.16 g/cm3 and a hardness of 5.56 GPa. The studied RHEAs could be potential candidates for high-temperature application materials where high hardness, ductility, and low density are required.

Chemical modification of waste oil fly ash for improved mechanical and thermal properties of low density polyethylene composites

2011 ◽  
Vol 18 (6) ◽  
pp. 2275-2284 ◽  
Author(s):  
Muhammad J. Khan ◽  
Abdulhadi A. Al-Juhani ◽  
Reyad Shawabkeh ◽  
Anwar Ul-Hamid ◽  
Ibnelwaleed A. Hussein
Keyword(s):  
Thermal Properties ◽  
Fly Ash ◽  
Chemical Modification ◽  
Low Density Polyethylene ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
Waste Oil ◽  
Oil Fly Ash ◽  
Polyethylene Composites

scholarly journals Linear Low Density Polyethylene Filled with Almond Shells Particles: Mechanical and Thermal Properties

2019 ◽  
Vol 135 (5) ◽  
pp. 1042-1044 ◽  
Author(s):  
L. Altay ◽  
A. Guven ◽  
M. Atagur ◽  
T. Uysalman ◽  
G. Sevig Tantug ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Low Density Polyethylene ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
Linear Low Density Polyethylene

Development of composite material aluminum-carbon nanotubes with high hardness and controlled thermal conductivity

2019 ◽  
Vol 53 (21) ◽  
pp. 2959-2965 ◽  
Author(s):  
AA Vozniakovskii ◽  
SV Kidalov ◽  
TS Kol'tsova
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Composite Material ◽  
Thermal Properties ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
High Hardness ◽  
Low Density ◽  
Aluminum Particles ◽  
Chemical Vapor Deposition Growth

The composite material was obtained by chemical vapor deposition growth of carbon nanotubes on the surface of aluminum particles followed by high-temperature compaction under pressure. The content of carbon nanotubes was 1 wt.%. A composite material with a hardness of 58–60 HB, which is two times higher than the hardness of original aluminum with an adjustable thermal conductivity of 50–150 W/(m × K) and with a low density of 2.7 g/cm3 have been obtained. It was found that the hardness and thermal properties could be adjusted depending on the temperature during hot pressing by controlling the formation of Al3C4 carbide.

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