Self-Propagating High-Temperature Synthesis of Aluminum Nitride under Lower Nitrogen Pressures

Autor:	Mee-Shik Shin, Yong-Seog Kim, Do-Hwan Ahn, Jason Shin
Rok vydání:	2004
Předmět:	Materials science Metallurgy Reaction zone Self-propagating high-temperature synthesis chemistry.chemical_element Nitride Microstructure Nitrogen Diluent chemistry Chemical engineering Aluminium Nitrogen gas Materials Chemistry Ceramics and Composites
Zdroj:	Journal of the American Ceramic Society. 83:1021-1028
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.2000.tb01324.x
Popis:	The synthesis of aluminum nitride (AlN) via self-propagating high-temperature synthesis (SHS) was attempted, using aluminum powder that was mixed with AlN powder as a diluent. The AlN content in the reactant was varied over a range of 30%–70%, and the nitrogen pressure was varied over a range of 0.1–1.0 MPa. The SHS reaction that was performed using a reactant that contained 50% AlN diluent, under a nitrogen-gas pressure of 0.8 MPa, yielded the highest conversion ratio of aluminum powder to AlN powder. A mechanism for the reaction of aluminum with nitrogen gas during the SHS process was discussed, based on observations of the microstructures of the reaction zone and products.
Databáze:	OpenAIRE
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