Dependence of the lattice thermal expansion perpendicular to the layer planes of pyro-carbons on their structural properties

Autor:	G. Pellegrini, M. Moulart, I. Zubani
Rok vydání:	1972
Předmět:	Materials science Fluidized bed Lattice (order) Bent molecular geometry Perpendicular General Materials Science General Chemistry Crystal structure Crystallite Pyrolytic carbon Composite material Thermal expansion
Zdroj:	Carbon. 10:342
ISSN:	0008-6223
DOI:	10.1016/0008-6223(72)90428-9
Popis:	The lattice thermal expansion perpendicular to the layer planes (αc) has been measured between room temperature and 1200°C on a large variety of pyrocarbon structures deposited in a fluidized bed as coatings on nuclear fuel particles. A correlation of αc with the structural and physical properties characterizing the deposits indicated that a linear relationship exists between αc and the apparent stack size Lc, αc increasing with Lc. High resolution electron micrographs of such pyrocarbons show that the crystallites are spherulite-shaped particles with the layer planes bent parallel to the external surface. Polygonization of the spherulites associated with growth is believed to furnish indicative elements for an explanation of the dependence of αc on Lc.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3a3eccd88b2af41aabb0dc6fd4bdc289 https://doi.org/10.1016/0008-6223(72)90428-9 Zobrazit plný text záznamu