TY - JOUR
T1 - Microstructure and mechanical properties of heat-treated silicon carbide-aluminum nitride solid solutions
AU - Lubis, Ahmad H.
AU - Hecht, Norman L.
AU - Watkins, Thomas R.
AU - More, Karren L.
AU - Ruh, Robert
PY - 2002/4
Y1 - 2002/4
N2 - Nanophase-structured composites were fabricated by heat treating hot-pressed 2H-wurtzite SiC-AlN solid-solution specimens of 25, 50, and 75 mol% AlN within the spinodal decomposition zone. Heat-treatment conditions were 1750°C for 150 h, in flowing nitrogen gas. The hot-pressed specimens contained 2H-wurtzite equiaxed grains, and the grain size increased with AlN content. Lattice parameters followed Vegard's law. Nanoprecipitates with typical modulated tweed-type structures were observed along the [21̄1̄0] zone axis and were orthogonal to the {011̄2} planes that make angles of 46.70°, 46.90°, and 47.11° to the [0001] for the three compositions. The microhardness, flexural strength, and fracture-toughness values of the heat-treated specimens were not significantly different from the hot-pressed values.
AB - Nanophase-structured composites were fabricated by heat treating hot-pressed 2H-wurtzite SiC-AlN solid-solution specimens of 25, 50, and 75 mol% AlN within the spinodal decomposition zone. Heat-treatment conditions were 1750°C for 150 h, in flowing nitrogen gas. The hot-pressed specimens contained 2H-wurtzite equiaxed grains, and the grain size increased with AlN content. Lattice parameters followed Vegard's law. Nanoprecipitates with typical modulated tweed-type structures were observed along the [21̄1̄0] zone axis and were orthogonal to the {011̄2} planes that make angles of 46.70°, 46.90°, and 47.11° to the [0001] for the three compositions. The microhardness, flexural strength, and fracture-toughness values of the heat-treated specimens were not significantly different from the hot-pressed values.
UR - http://www.scopus.com/inward/record.url?scp=0036544982&partnerID=8YFLogxK
U2 - 10.1111/j.1151-2916.2002.tb00195.x
DO - 10.1111/j.1151-2916.2002.tb00195.x
M3 - Article
AN - SCOPUS:0036544982
SN - 0002-7820
VL - 85
SP - 933
EP - 940
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 4
ER -