Abstract
The effects of adding calcium hydroxide (Ca(OH)2) to a copper-carbon fiber (30%) composite (Cu-CF(30%)) were studied. After sintering at 700 °C, precipitates of calcium oxide (CaO) were included in the copper matrix. When less than 10% of Ca(OH)2 was added, the thermal conductivity was similar to or higher than the reference composite Cu-CF(30%). A thermal conductivity of 322 W.m-1.K-1 was measured for the Cu-Ca(OH)2(3%)-CF(30%) composite. The effects of heat treatment (400 °C, 600 °C and 1000 °C during 24 hours) on the composite Cu-Ca(OH)2(3%)-CF(30%) were studied. At the lower annealing temperature, CaO inside the matrix migrated to the interface of the copper matrix and the carbon fiber. At 1000 °C, the formation of the interphase calcium carbide (CaC2) at the interface of the copper and carbon fibers was highlighted by TEM observations. Carbide formation at the interface led to a decrease in both thermal conductivity (around 270 W.m-1.K-1) and the coefficient of thermal expansion (CTE (10.1 10-6 K-1)).
| Original language | English (US) |
|---|---|
| State | Published - 2015 |
| Event | 20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark Duration: Jul 19 2015 → Jul 24 2015 |
Other
| Other | 20th International Conference on Composite Materials, ICCM 2015 |
|---|---|
| Country/Territory | Denmark |
| City | Copenhagen |
| Period | 7/19/15 → 7/24/15 |
Keywords
- Calcium hydroxide
- Carbon fiber
- Composite materials
- Copper
- Interphase
- Thermal properties
ASJC Scopus subject areas
- General Engineering
- Ceramics and Composites