As an alternative, {HEAD ~ materials} such as graphite, carbon fiber reinforced graphite, {TAIL ~ silicon carbide} or carbon fiber reinforced silicon carbide can be coated with silicon in order to avoid contamination of the product, particularly contamination with carbon or with silicon carbide particles 
such as
As an alternative , { HEAD ~ materials } such as graphite , carbon fiber reinforced graphite , { TAIL ~ silicon carbide } or carbon fiber reinforced silicon carbide can be coated with silicon in order to avoid contamination of the product , particularly contamination with carbon or with silicon carbide particles
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH