TY - GEN
T1 - Effect of heat treatment on thermal properties of pitch-based carbon fiber and pan-based carbon fiber carbon-carbon composites
AU - Iqbal, Sardar S.
AU - Dinwiddie, Ralph
AU - Porter, Wallace
AU - Lance, Michael
AU - Filip, Peter
PY - 2011
Y1 - 2011
N2 - Thermal properties of two directional (2D) pitch-based carbon fiber with charred resin and three directional (3D) PAN-based carbon fiber with CVI carbon matrix C/C composite were investigated for non-heat treated (NHT) and heat treated (HT) materials through the thickness (z-direction). Heat treatment was performed at 1800, 2100 and 2400 °C for 1-hr in inert argon atmosphere. Thermal diffusivity, heat capacity and bulk density were measured to calculate thermal conductivity. Thermal diffusivity and conductivity was the highest for 3D C/C heat treated at maximum temperature with non-heat treated one exhibiting the lowest thermal conductivity. Similarly, 2D C/C heat treated at maximum temperature exhibited the highest thermal diffusivity and thermal conductivity. Polarized light microscopy (PLM) images of HT C/C show a progressive improvement in microstructure when compared to NHT C/C. However, HT 2D and 3D C/C composites exhibited extensive shrinkage of charred resin and CVI carbon matrix, respectively, from fibers resulting in intra and inter-bundles cracking when compared to NHT one. Raman spectroscopy and XRD results of NHT and HT C/C indicated increased ordering of structure. A progressive improvement in thermal properties was observed with increased heat treatment temperatures.
AB - Thermal properties of two directional (2D) pitch-based carbon fiber with charred resin and three directional (3D) PAN-based carbon fiber with CVI carbon matrix C/C composite were investigated for non-heat treated (NHT) and heat treated (HT) materials through the thickness (z-direction). Heat treatment was performed at 1800, 2100 and 2400 °C for 1-hr in inert argon atmosphere. Thermal diffusivity, heat capacity and bulk density were measured to calculate thermal conductivity. Thermal diffusivity and conductivity was the highest for 3D C/C heat treated at maximum temperature with non-heat treated one exhibiting the lowest thermal conductivity. Similarly, 2D C/C heat treated at maximum temperature exhibited the highest thermal diffusivity and thermal conductivity. Polarized light microscopy (PLM) images of HT C/C show a progressive improvement in microstructure when compared to NHT C/C. However, HT 2D and 3D C/C composites exhibited extensive shrinkage of charred resin and CVI carbon matrix, respectively, from fibers resulting in intra and inter-bundles cracking when compared to NHT one. Raman spectroscopy and XRD results of NHT and HT C/C indicated increased ordering of structure. A progressive improvement in thermal properties was observed with increased heat treatment temperatures.
UR - http://www.scopus.com/inward/record.url?scp=80155148117&partnerID=8YFLogxK
U2 - 10.1002/9781118095355.ch23
DO - 10.1002/9781118095355.ch23
M3 - Conference contribution
AN - SCOPUS:80155148117
SN - 9781118059876
T3 - Ceramic Engineering and Science Proceedings
SP - 245
EP - 254
BT - Mechanical Properties and Performance of Engineering Ceramics and Composites VI - A Collection of Papers Presented at the 35th International Conference on Advanced Ceramics and Composites, ICACC'11
PB - American Ceramic Society
T2 - Mechanical Properties and Performance of Engineering Ceramics and Composites VI - 35th International Conference on Advanced Ceramics and Composites, ICACC'11
Y2 - 23 January 2011 through 28 January 2011
ER -