Recently, there was a comment about CFC fixtures on following heat treat news site.

Here’s the link:  http://www.themonty.com/heattreatnews.htm

“Carbon Fibre Fixturing. Recently we’ve had a couple of readers ask us about CFC fixturing for heat treating furnaces. I’ve run across this several times over the years, always in vacuum furnaces and always at plants doing high end heat treating such as aerospace companies. Based upon the questions we received we approached a very experienced heat treater we know Robert Peters who runs the ALD Thermal Treatment plant (commercial vacuum carburizing heat treating) and asked his opinion. His thoughts are very similar to what I have always felt-amazing stuff but not cheap. February 3/10

• CFC is Carbon Fiber Carbon, Carbon Powder over Carbon fiber cover with Carbon Powder.
  
• It’s weight is very light, it will not hold heat like alloy will, it does not distort and will last seven to ten years if it is handled and taken care of correctly.
  
• It is good for gas quenching, not oil quenching.
  
• It’s not for heat treatment of all products, meaning that some product will always need alloy (pinion gears, sun gears, any small type of a part that needs a locator).
  
• It will help in reducing distortion. You are quenching the product not the fixturing. When quenching using alloy, alloy holds heat as well as the part, therefore you are quenching both items “fixture and product”.
  
• With CFC you are quenching product not the fixturing, CFC will not hold heat during the quench. You are now addressing the product during quench. Some product after heat treatment are so good (little to no distortion) that after heat treatment there is no more machining and it goes straight to assemble.
  
• The cost is usually two to three times the cost of alloy.
  
• One of the benefits is, you will get you investment back three fold.”