TY  - JOUR 
T1  - Fracture toughness of Si3N4 processed by gas pressure sintering and hot pressing
JO  - Materials Research
A1  - Rocha, Cláudio V.
A1  - Costa, Célio A.
SN  - 1516-1439
UL  - 10.1590/S1516-14392006000200006
VL  - 9 
Y1  - 2006
PB  - Brazil 
ER  -