Silicon–Oxygen Quartz Tetrahedra and Consolidation Processes during High-Pressure Torsion

Autor:	M. S. Pushkin, T. P. Tolmachev, V. P. Pilyugin, A. M. Patselov, Mikhail A. Ivanov, B. A. Greenberg
Rok vydání:	2021
Předmět:	Materials science Consolidation (soil) 020502 materials Metals and Alloys Torsion (mechanics) 02 engineering and technology Adhesion Brittleness 0205 materials engineering visual_art visual_art.visual_art_medium Tetrahedron Ceramic Surface layer Composite material Quartz
Zdroj:	Russian Metallurgy (Metally). 2021:449-453
ISSN:	1555-6255 0036-0295
Popis:	A mechanism for the consolidation (performed experimentally earlier) of brittle quartz powder particles under a strong external action (high-pressure torsion) is proposed. This mechanism is based on possible destruction of silicon–oxygen tetrahedra via breakage of the Si–O interatomic bonds. The surface layer of the ceramic powder particles is shown to contain initial tetrahedra and their “fragments,” i.e., defects of the tetrahedra (proposed for the first time by the authors together with the name). The emergence of the tetrahedra and their fragments to the surface by the faces, edges, and vertices predetermines the surface shape and, eventually, surface adhesion. The enhancement of an external action results in healing broken Si–O bonds, which predetermines the possibility of partial or complete consolidation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::05df23c0fbe6a27b1edf0fb032cc04b2 https://doi.org/10.1134/s003602952104011x Zobrazit plný text záznamu Full text from SpringerLink