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La 2 O 3 and Al 2 O 3 are considered as promising additions to improve SiC fracture toughness by forming LaAlO 3 and promoting SiC liquid phase sintering. Thus, phase relations between LaAlO 3 , SiO 2 and SiC in the temperature range 1300-1600 o C were studied. It was shown that although LaAlO 3 reacts with SiO 2 , forming...
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