Journal
METALS
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/met11020372
Keywords
aluminum-cerium alloys; solidification; differential scanning calorimetry; cooling curve thermal analysis
Funding
- Program of Energy Research and Development (PERD) of Natural Resources Canada
Ask authors/readers for more resources
This study utilized DSC and CCTA thermal analysis techniques to evaluate the solidification and melting behavior of Al-Ce binary alloys, revealing significant differences in reaction temperatures under different alloy compositions that may exceed the typical measurement errors for each technique. Additionally, differences were observed in detecting certain reactions and non-equilibrium effects between DSC and CCTA.
Two common techniques of thermal analysis, Differential Scanning Calorimetry (DSC) and Cooling/Heating Curve Thermal Analysis (CCTA), based on different signal collected and utilizing samples with a weight difference of three orders of magnitude, were used to assess the solidification and melting behavior of Al-Ce binary alloys, containing from 5 to 20 wt. % Ce. Thermal analysis was accompanied by microscopic observations of solidified structures. For heating/cooling rates of 0.2-0.4 degrees C/s, temperatures of eutectic transformation L <-> Al + Al11Ce3 in the Al-10Ce alloy along with additional proeutectic reactions L <-> Al in the Al-5Ce hypoeutectic alloy and L <-> Al11Ce3 in Al-15Ce and Al-20Ce hypereutectic alloys, were determined. Although there was a general agreement in major transformations, registered by DSC and CCTA during melting and solidification, differences in the reaction temperature determined exceeded the typical measurement errors for each technique. In addition, DSC and CCTA exhibited differences in detecting some proeutectic reactions and minor non-equilibrium effects, accompanying the eutectic transformation. Some factors that could contribute to differences observed and their implications for engineering practice were discussed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available