low price sell Unidirectional carbon fiber fabric

  The  applications  of  carbon  fibers and Unidirectional Fiber Carbon Fabric are  limited above 500 。C by their poor oxidation resistance in oxygen- containing  atmosphere.  In  this  study,  oxidation-resistant SiO2/SiC coatings were synthesized on carbon fiber fabric by   a   novel   plasma   electrolysis    spray   process.   The microstructure and properties of coatings prepared at dif- ferent  spray  distances  and  different  spray  times  were investigated. The coatings were mainly composed of SiO2 and SiC with a SiC content varying between about 15 and 95 wt.%. The optimal coating was obtained with a spray time  of  30 s  and  a  spray  distance  of  20 mm;  it  corre- sponded to an increase in the fabric burnt-out temperature by  320 。C.  Additionally,  the  mass  loss  rate  was   only around 50%  at  900 。C,  while the bare  carbon fiber was burnt  out.  The  kinetics   and  thermodynamics  processes were  also investigated in order to understand this novel plasma  electrolysis  spray  process.  We  believe  that  this process will find a wide range of applications in the surface modification of  carbin fibers.