TY - JOUR
T1 - Phase Formation of Ca-alpha-sialon by Reaction Sintering
AU - Rutten, van, J.W.T.
AU - Hintzen, H.T.J.M.
AU - Metselaar, R.
PY - 1996
Y1 - 1996
N2 - In this study the reaction sintering route for the formation of Ca-a-sialon with a composition on the line Si3N4/CaO · 3AlN (Ca0.8 Si9.6 Al2.4 O0.8 N15.2, m = 1.6, N = 0.8) has been investigated. This is compared with the hot-pressing of Ca-a-sialon and the reaction sintering of Y- or lanthanide-a-sialons. The reaction follows the same sequence: first, the formation of a Ca-rich a-sialon phase (m = 1.9) which is gradually transformed to a Ca-a-sialon with a lower Ca concentration (m = 1.2). The gehlenite phase (Ca2Al2SiO7, melilite group) is observed as an intermediate product. A potential advantage of Ca-a-sialon over Ln-a-sialon
Full-size image
is liquid phase formation at a lower temperature, which has a positive influence on the processing temperature. Moreover, Ca is cheaper than the lanthanides. The solubility of Ca in the a-sialon is in agreement with values found in the literature.
AB - In this study the reaction sintering route for the formation of Ca-a-sialon with a composition on the line Si3N4/CaO · 3AlN (Ca0.8 Si9.6 Al2.4 O0.8 N15.2, m = 1.6, N = 0.8) has been investigated. This is compared with the hot-pressing of Ca-a-sialon and the reaction sintering of Y- or lanthanide-a-sialons. The reaction follows the same sequence: first, the formation of a Ca-rich a-sialon phase (m = 1.9) which is gradually transformed to a Ca-a-sialon with a lower Ca concentration (m = 1.2). The gehlenite phase (Ca2Al2SiO7, melilite group) is observed as an intermediate product. A potential advantage of Ca-a-sialon over Ln-a-sialon
Full-size image
is liquid phase formation at a lower temperature, which has a positive influence on the processing temperature. Moreover, Ca is cheaper than the lanthanides. The solubility of Ca in the a-sialon is in agreement with values found in the literature.
U2 - 10.1016/0955-2219(95)00010-0
DO - 10.1016/0955-2219(95)00010-0
M3 - Article
SN - 0955-2219
VL - 16
SP - 995
EP - 999
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 9
ER -