TY - JOUR AU - George Quinn AU - J Swab AU - M Motyka C2 - Journal of the American Ceramic Society DA - 2003-06-01 LA - en M1 - 86 PB - Journal of the American Ceramic Society PY - 2003 TI - Fracture Toughness of Toughened Silicon Nitride by ASTM C 1421 ER -