TY - JOUR
T1 - Fabrication and properties of Al-infiltrated RBAO-based composites
AU - Wu, Suxing
AU - Gesing, A.J.
AU - Travitzky, N.A.
AU - Claussen, N.R.
PY - 1991
Y1 - 1991
N2 - The reaction-bonded Al2O3 (RBAO) process is applied to fabricate open porosity Al2O3-based composites with SiC and Al2O3 particulate inclusions. These are then gas-pressure infiltrated with liquid aluminum. The Al-infiltrated composites exhibit strongly improved mechanical properties, e.g. fracture toughness and bond strength of samples containing 30 vol.% 13 µm diameter Al2O3 platelets are enhanced 1·6 to 5·8 MPavm and from 85 to 760 MPa, respectively. In all cases, crack bridging by ductile Al ligaments is the main toughening mechanism. Filling of void defects, caused by particulate agglomeration, with Al is especially effective in reducing the strength-controlling flaw size.
AB - The reaction-bonded Al2O3 (RBAO) process is applied to fabricate open porosity Al2O3-based composites with SiC and Al2O3 particulate inclusions. These are then gas-pressure infiltrated with liquid aluminum. The Al-infiltrated composites exhibit strongly improved mechanical properties, e.g. fracture toughness and bond strength of samples containing 30 vol.% 13 µm diameter Al2O3 platelets are enhanced 1·6 to 5·8 MPavm and from 85 to 760 MPa, respectively. In all cases, crack bridging by ductile Al ligaments is the main toughening mechanism. Filling of void defects, caused by particulate agglomeration, with Al is especially effective in reducing the strength-controlling flaw size.
U2 - 10.1016/0955-2219(91)90105-9
DO - 10.1016/0955-2219(91)90105-9
M3 - Article
SN - 0955-2219
VL - 7
SP - 277
EP - 281
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 5
ER -