Materials Type: Harder components advantage from the sharper silicon carbide, even though softer elements and finer finishes are better realized with aluminum oxide. GA's engineered ATF rod cladding is actually a multi-layered composite style and design composed of SiC fiber within a SiC matrix. The ATF system was initiated by http://cristianoojs975.wpsuo.com/the-3-biggest-disasters-in-electrical-properties-of-silicon-carbide-history