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Investigation of SiC–AlN system: Part I. Microstructure and solid solution

Published online by Cambridge University Press:  03 March 2011

Jow-Lay Huang  and
Jyh-Ming Jih
Jow-Lay Huang
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan 701, Republic of China
Jyh-Ming Jih
Affiliation:
Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan 701, Republic of China
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Abstract

The primary aim of this present work was to investigate the solubility, microstructure, thermal stability, AlN polytypes, and interfacial reactions in the SiC-AlN system. Alpha SiC particles of different sizes were incorporated into AlN and hot pressed at 2050 °C for 1 to 3 h. XRD, OM, STEM, WDS, and SAD patterns were utilized in analyzing phases, morphology, and distribution of elements. The surface area of SiC particles was found to have substantial effects on the formation of solid solution. Multilayered polytypes, which are usually associated with stacking faults, grew and impeded one another. Additionally, the number of planes between subsequent stacking increased with the increase of either hot-pressing temperature or time. Affinity of oxygen to AlN probably played an essential role in the formation of polytypes and stacking faults.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 3 , March 1995 , pp. 651 - 658
Copyright
Copyright © Materials Research Society 1995

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