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