Fracture toughness measurements of YBa2Cu3Ox single crystals

The paper reports fracture toughness measurements on single crystals of YBa2Cu3Ox, the phase responsible for superconductivity above liquid-nitrogen temperatures. Indentation crack-length measurements on the (010) orthorhombic crystal growth faces revealed the (100) and (001) planes as preferred fra...

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Veröffentlicht in:	Applied physics letters 1987-08, Vol.51 (6), p.454-456
Hauptverfasser:	COOK, R. F, DINGER, T. R, CLARKE, D. R
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Fatigue, brittleness, fracture, and cracks Mechanical and acoustical properties of condensed matter Mechanical properties of solids Physics
Online-Zugang:	Volltext
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Zusammenfassung:	The paper reports fracture toughness measurements on single crystals of YBa2Cu3Ox, the phase responsible for superconductivity above liquid-nitrogen temperatures. Indentation crack-length measurements on the (010) orthorhombic crystal growth faces revealed the (100) and (001) planes as preferred fracture planes. The toughness of these planes is K(c) = 1.1 + or - 0.3 Mpa sq rt m, and the hardness H = 8.7 + or - 2.4 GPa. The observed growth of both radial and lateral cracks in ambient air suggests that these crystals are susceptible to moisture-enhanced nonequilibrium crack propagation. (Author)
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.98420