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Cation-Aided Joining of Surfaces of β-Silicon Nitride: Structural and Electronic Aspects
Dudesek, Pavel ; Benco, L'ubomír
Journal of the American Ceramic Society, 1998-05, Vol.81 (5), p.1248-1255
[Peer Reviewed Journal]
Westerville, Ohio: American Ceramics Society
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Title:
Cation-Aided Joining of Surfaces of β-Silicon Nitride: Structural and Electronic Aspects
Author:
Dudesek, Pavel
;
Benco, L'ubomír
Subjects:
Condensed matter: structure, mechanical and thermal properties
;
Exact sciences and technology
;
Physics
;
Solid surfaces and solid-solid interfaces
;
Surface structure and topography
;
Surfaces and interfaces
;
thin films and whiskers (structure and nonelectronic properties)
Is Part Of:
Journal of the American Ceramic Society, 1998-05, Vol.81 (5), p.1248-1255
Notes:
ark:/67375/WNG-G5L77257-0
ArticleID:JACE1248
istex:96F699533479C9D40EAFC889CFFB038D0B1ACD36
Work performed at Institute of Inorganic Chemistry was supported by U.S.‐Sloval Scientific and Technological Program No. 94039 and by the Slovak Grant Agency VEGA (under Grant No. 1172).
R. H. French—contributing editor
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Description:
An atomic‐scale approach has been applied to the examination of both the physical and electronic structures of stable surfaces of β‐Si3N4. Sterical constraints prevent the (001) surface from effective chemical reaction with the interface. The theoretical surface‐to‐surface bonding is investigated by using a periodical tight‐binding approach. Based on the interpretation of the density of states, the balance of the number of states and electrons is performed for stoichiometric Si3N4, ideal N‐terminated (110) surfaces, oxygen‐overlayered (110) slabs, and the metal monolayer with which the slabs are brought into contact. The stable electronic configuration, which is attained when the cation binds to the interface, represents the electronic driving force behind the diffusion of the additive and/or impurity atoms toward grain boundaries. The different bonding propensities of the (001) and (110) surfaces imply that effective bonding of the planes parallel to the c‐direction to the interphase restrains the crystal from growth in the lateral direction. Conversely, geometry‐constrained bonding of the (001) planes allows the crystal growth that produces the rod‐shaped β‐grains.
Publisher:
Westerville, Ohio: American Ceramics Society
Language:
English
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