Hexoloy SX SiC materials, sintered with the addition of yttrium and aluminum containing compounds, have been demonstrated to possess higher toughness and strength than the boron and carbon doped Hexoloy SA [1]. Under a Department of Energy/Oak Ridge National Laboratory (DOE/ORNL) contract, a complete characterization was conducted on an SX composition selected for high temperature application. The particular composition selected for that study was Generation 1 SX-SiC (SX-G1), which contained about 2 wt% total additives.

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