Affiliation:
1. King Fahd University of Petroleum and Minerals, Department of Mechanical Engineering, Dhahran, Saudi Arabia
2. King Fahd University of Petroleum and Minerals, Centre of Research Excellence in Nanotechnology, Dhahran, Saudi Arabia
Abstract
In this work, compressive and thermal properties of aluminum, milled
aluminum, and Al-10Al2O3 composite processed via ball milling (BM) and spark
plasma sintering (SPS) were investigated. The microstructural features of
powders and sintered samples were characterized using optical and scanning
electron microscopy. A universal testing machine was used to determine the
compressive properties of the consolidated samples. The thermal conductivity
and coefficient of thermal expansion of the developed materials were
characterized using a hot disc thermal constant analyzer and a dilatometer,
respectively. The Al-10Al2O3 composite possessed hardness of 1309.7 MPa,
yield strength of 311.4 MPa, and compressive strength of 432.87 MPa compared
to hardness of 326.3 MPa, yield strength of 74.33 MPa, and compressive
strength of 204.43 MPa for aluminum. The Al-10Al2O3 composite had thermal
conductivity value 81.42 W/mK compared to value of 198.09 W/mK for aluminum.
In the temperature range from 373 K to 723 K, the composite had lower CTEs
ranging from 10 ? 10?6 to 22 ? 10?6/K compared to 20 ? 10?6 to 30 ? 10?6/K
for aluminum.
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Condensed Matter Physics,Ceramics and Composites
Cited by
9 articles.
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