TY - JOUR
T1 - Microstructural development in AlN composite ceramics
AU - Tajika, Masahiko
AU - Matsubara, Hideaki
AU - Rafaniello, William
N1 - Funding Information:
This research was sponsored by NEDO, under the Synergy Ceramics Project of the International Science and Technology Frontier (ISTF) Program promoted by AIST, MITI, Japan. The authors are members of the Joint Research Consortium of Synergy Ceramics.
PY - 1999
Y1 - 1999
N2 - AlN-BN composite ceramics were fabricated by sintering a mixture of fine AlN and BN powders containing Y2O3 as the sintering aid at 1850°C in nitrogen atmosphere. BN contents up to 15 vol% were studied. The heat treatment of sintered AlN-BN composite was performed at 1800°C in nitrogen atmosphere. BN particles in the composite showed large anisotropic grain growth during sintering, and the shape of grown BN particles appeared to be plate-like. Moreover, the heat treatment gave very interesting microstructures of the composite, in which many more interfaces between AlN grains were observed and most of the secondary phase was located at triple points of AlN grains. The resultant microstructural change is thought to be due to the change in the ratio of interfacial energy (between grain and liquid) and grain boundary energy (between grains).
AB - AlN-BN composite ceramics were fabricated by sintering a mixture of fine AlN and BN powders containing Y2O3 as the sintering aid at 1850°C in nitrogen atmosphere. BN contents up to 15 vol% were studied. The heat treatment of sintered AlN-BN composite was performed at 1800°C in nitrogen atmosphere. BN particles in the composite showed large anisotropic grain growth during sintering, and the shape of grown BN particles appeared to be plate-like. Moreover, the heat treatment gave very interesting microstructures of the composite, in which many more interfaces between AlN grains were observed and most of the secondary phase was located at triple points of AlN grains. The resultant microstructural change is thought to be due to the change in the ratio of interfacial energy (between grain and liquid) and grain boundary energy (between grains).
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U2 - 10.1016/S0965-9773(99)00081-1
DO - 10.1016/S0965-9773(99)00081-1
M3 - Conference article
AN - SCOPUS:0032593691
SN - 0965-9773
VL - 12
SP - 131
EP - 134
JO - Nanostructured Materials
JF - Nanostructured Materials
IS - 1
T2 - Proceedings of the 1998 4th International Conference on Nanostructured Materials (NANO '98)
Y2 - 14 June 1998 through 19 June 1998
ER -