| Thermal Conductivity of Al2O3/Glass/Cf Composite
Substrates Prepared by Low Temperature Sintering |
S. X. Wang*, G. S. Liu, X. Q. Ouyang1, Y. D. Wang1 and D. Zhang
pages : 213-217
DOI : 10.1080/0371750X.2015.1095117 |
| Abstract |
| Carbon fiber (Cf) with high thermal conductivity was introduced into the alumina based composites. To avoid
oriented alignment of carbon fibers and carbothermal reactions during the sintering process, the Al2O3/glass/Cf
substrate was hot pressed under a segmental pressure procedure at 1123 K. Experimental results showed that the
thermal conductivity of Al2O3/glass/Cf increased with the contents of Cf when the volume of Cf was below 30%.
The thermal conductivity of Al2O3/30% glass/30% Cf was as high as 28.98 W.(mK)–1, which was 4.56 times and
2.23 times higher than that of Al2O3/30% glass and AlN/30% glass, respectively. However, the thermal conductivity
of Al2O3/glass/Cf decreased with the contents of Cf when the volume of Cf was over 30%. In the Al2O3/30%
glass/30% Cf composite, carbon fibers lapped with each other and formed a three dimensional network in the
matrix. The three dimensional network of carbon fibers brought excellent heat conducting performance to the
Al2O3/30% glass/30% Cf composite. |
| Full text : Subscribe to Download Full Text |
| [Go Back] |
|
