Growth of oriented C11b MoSi2 bicrystals using a modified Czochralski technique

Autor:	F. Chu, Pedro Peralta, Joseph R. Michael, Kenneth J. McClellan, J.D. Garrett, Terence E. Mitchell
Rok vydání:	1999
Předmět:	Materials science Boule Misorientation Scanning electron microscope Crystal growth Condensed Matter Physics Microstructure Inorganic Chemistry Crystallography Materials Chemistry Grain boundary Composite material Single crystal Seed crystal
Zdroj:	Journal of Crystal Growth. 205:515-522
ISSN:	0022-0248
Popis:	Oriented bicrystals of pure C11b MoSi2 have been grown in a tri-arc furnace using the Czochralski technique. Two single crystal seeds were used to initiate the growth. Each seed had the orientation intended for one of the grains of the bicrystals, which resulted in a 60° twist boundary on the (110) plane. Seeds were attached to a water-cooled seed rod, which was pulled at 120 mm/h with the seed rod rotating at 45 rpm. The water- cooled copper hearth was counter-rotated at 160 rpm. Asymmetric growth ridges associated with each seed crystal were observed during growth and confirmed the existence of a bicrystal. It was also found that careful alignment of the seeds was needed to keep the grain boundary from growing out of the boule. The resulting boundary was characterized by imaging and crystallographic techniques in a scanning electron microscope. The boundary was found to be fairly sharp and the misorientation between the grains remained within 2° from the disorientation between the seeds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aeb9a6dd55e535680a88d339a01c7fba https://doi.org/10.1016/s0022-0248(99)00332-2 Zobrazit plný text záznamu Full Text from ScienceDirect