Amorphization during mechanical grinding of Bi-Pb-Sr-Ca-Cu-O ceramic superconductors

Autor:	L Fiermans, K Verbist, Els Bruneel, Serge Hoste
Rok vydání:	1996
Předmět:	High-temperature superconductivity Materials science General Engineering General Physics and Astronomy Sintering Microstructure Grain size Grinding law.invention Crystal Crystallinity law visual_art visual_art.visual_art_medium Ceramic Composite material
Zdroj:	Applied Superconductivity. 4:357-364
ISSN:	0964-1807
DOI:	10.1016/s0964-1807(97)00018-5
Popis:	The report describes the amorphization occurring during mechanical grinding of a mixture of Bi-HTSC 2223 and 2212 phases. It is shown that the visually determined grain size and the actual crystal size diminish upon grinding. Noticeable amorphization occurs even after only 30 min of grinding. Furthermore, different crystal planes exhibit variable sensitivity towards the amorphization process and the high Tc-phase is more easily affected by this phenomenon than the low Tc-phase in the Bi-system. Identical results were obtained whether the starting composition of the spray dried powder was 2223 or 2234.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fd70b15e9a65ba14b4c3364b9a2956d5 https://doi.org/10.1016/s0964-1807(97)00018-5 Zobrazit plný text záznamu Full Text from ScienceDirect