Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7882590 | Acta Materialia | 2014 | 12 Pages |
Abstract
A shape memory alloy/MAX phase composite, namely NiTi/Ti3SiC2 composite, was fabricated using spark plasma sintering at 1233Â K under 100Â MPa for 8Â min, from a NiTi/Ti3SiC2 powder mixture with a 50/50 v/v ratio. The thermal diffusivity was measured at both ambient and elevated temperatures up to 1224Â K using a laser flash analyzer. The specific heat at constant pressure was measured over the temperature range 300-600Â K using a differential scanning calorimeter. The thermal conductivity was then calculated from the thermal diffusivity, specific heat and density. To validate the experimental results, a survey of data on the thermal diffusivity, specific heat and thermal conductivity of monolithic NiTi and Ti3SiC2 was carried out. Finite-element modeling of a micromechanics-based representative volume element was carried out to predict the thermal conductivity of the NiTi/Ti3SiC2 composite. An agreement between the experimental and finite-element results was found.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Feifei Cheng, Liangfa Hu, Junuthula N. Reddy, Ibrahim Karaman, Elizabeth Hoffman, Miladin Radovic,