Thermal Ageing of Carbon Fiber‐Reinforced Cyanate Ester Composites Under Inert and Oxidative Environment

2018 ◽  
Vol 40 (S2) ◽  
pp. E1388-E1396
Author(s):  
Evgenia Kollia ◽  
Antonios Vavouliotis ◽  
Vassilios Kostopoulos
Keyword(s):  
Carbon Fiber ◽  
Thermal Ageing ◽  
Cyanate Ester ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

Effects of hyperthermal atomic oxygen on a cyanate ester and its carbon fiber-reinforced composite

2018 ◽  
Vol 31 (4) ◽  
pp. 472-482 ◽  
Author(s):  
Heilong Wang ◽  
Min Qian ◽  
Vanessa J Murray ◽  
Bohan Wu ◽  
Yang Yang ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Surface Topography ◽  
Photoelectron Spectroscopy ◽  
Atomic Oxygen ◽  
Sample Surface ◽  
Low Earth Orbit ◽  
Cyanate Ester ◽  
Fiber Reinforced ◽  
Reaction Products ◽  
Carbon Fiber Reinforced

The durability of cyanate ester (CE) to hyperthermal atomic oxygen (AO) attack in low Earth orbit may be enhanced by the addition of carbon fiber to form a carbon fiber-reinforced cyanate ester composite (CFCE). To investigate the durability of CFCE relative to CE, samples were exposed to a pulsed hyperthermal AO beam in two distinct types of experiments. In one type of experiment, samples were exposed to the beam, with pre- and post-characterization of mass (microbalance), surface topography (scanning electron microscopy (SEM)), and surface chemistry (X-ray photoelectron spectroscopy (XPS)). In the second type of experiment, the beam was directed at a sample surface, and volatile products that scattered from the surface were detected in situ with the use of a rotatable mass spectrometer detector. CFCE exhibited less mass loss than pure CE with a given AO fluence, confirming that the incorporation of carbon fiber adds AO resistance to CE. Erosion yields of CE and CFCE were 2.63 ± 0.16 × 10−24 and 1.46 ± 0.08 × 10−24 cm3 O-atom−1, respectively. The reduced reactivity of CFCE in comparison to CE was manifested in less oxidation of the CFCE surface in XPS measurements and reduced CO, CO2, and OH reaction products in beam-surface scattering experiments. The surface topographical images collected by SEM implied different surface deterioration processes for CE and CFCE. A change of surface topography with increasing AO fluence for CE indicated a threshold AO fluence, above which the erosion mechanism changed qualitatively. CFCE showed almost intact carbon fibers after relatively low AO fluences, and while the fibers eventually eroded, they did not erode as rapidly as the CE component of the composite.

Carbon Fiber-Reinforced Cyanate Ester/Nano-ZrW2O8 Composites with Tailored Thermal Expansion

2011 ◽  
Vol 4 (2) ◽  
pp. 510-517 ◽  
Author(s):  
Prashanth Badrinarayanan ◽  
Mark K. Rogalski ◽  
Michael R. Kessler
Keyword(s):  
Thermal Expansion ◽  
Carbon Fiber ◽  
Cyanate Ester ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

The effect of thermo-oxidative aging on carbon fiber reinforced cyanate ester composites

2014 ◽  
Vol 49 (26) ◽  
pp. 3241-3250 ◽  
Author(s):  
Eleni Fiamegkou ◽  
Evgenia Kollia ◽  
Antonios Vavouliotis ◽  
Vassilis Kostopoulos
Keyword(s):  
Carbon Fiber ◽  
Cyanate Ester ◽  
Fiber Reinforced ◽  
Oxidative Aging ◽  
Carbon Fiber Reinforced

Effects of high pressure on the crystallization of carbon fiber reinforced polyetheretherketone (CF/PEEK) laminate composites

1990 ◽  
Vol 48 (4) ◽  
pp. 876-877
Author(s):  
Hong-Ming Lin ◽  
C. H. Liu ◽  
R. F. Lee
Keyword(s):  
High Pressure ◽  
Carbon Fiber ◽  
Sample Surface ◽  
High Yield ◽  
Fiber Reinforced ◽  
Laminate Composites ◽  
Peek Composite ◽  
Continuous Carbon Fiber ◽  
Carbon Fiber Reinforced

Polyetheretherketone (PEEK) is a crystallizable thermoplastic used as composite matrix materials in application which requires high yield stress, high toughness, long term high temperature service, and resistance to solvent and radiation. There have been several reports on the crystallization behavior of neat PEEK and of CF/PEEK composite. Other reports discussed the effects of crystallization on the mechanical properties of PEEK and CF/PEEK composites. However, these reports were all concerned with the crystallization or melting processes at or close to atmospheric pressure. Thus, the effects of high pressure on the crystallization of CF/PEEK will be examined in this study.The continuous carbon fiber reinforced PEEK (CF/PEEK) laminate composite with 68 wt.% of fibers was obtained from Imperial Chemical Industry (ICI). For the high pressure experiments, HIP was used to keep these samples under 1000, 1500 or 2000 atm. Then the samples were slowly cooled from 420 °C to 60 °C in the cooling rate about 1 - 2 degree per minute to induce high pressure crystallization. After the high pressure treatment, the samples were scanned in regular DSC to study the crystallinity and the melting temperature. Following the regular polishing, etching, and gold coating of the sample surface, the scanning electron microscope (SEM) was used to image the microstructure of the crystals. Also the samples about 25mmx5mmx3mm were prepared for the 3-point bending tests.

Sign in / Sign up

Export Citation Format

Share Document