INVESTIGATION OF MECHANICAL-PROPERTIES OF NATURAL GLASSES USING INDENTATION METHODS

Authors
GERTH U SCHNAPP JD
Citation
U. Gerth et Jd. Schnapp, INVESTIGATION OF MECHANICAL-PROPERTIES OF NATURAL GLASSES USING INDENTATION METHODS, Chemie der Erde, 56(4), 1996, pp. 398-403
Citations number
5
Categorie Soggetti
Geochemitry & Geophysics
Journal title
Chemie der Erde → ACNP
ISSN journal
00092819
Volume
56
Issue
4
Year of publication
1996
Pages
398 - 403
Database
ISI
SICI code
0009-2819(1996)56:4<398:IOMONG>2.0.ZU;2-9
Abstract
Mechanical properties of obsidians were investigated using indentation methods. Edge, radial and ring cracks and also more complex crack con figurations occur in these glasses. The average values of hardness are 525 HK 0.1 and 650 HV 0.3. Reduced Young's modulus is 74.7 GPa or low er. The samples can be divided into three groups according to fracture toughness (K-lc increase from 1.3 to 1.7 MN/m(1.5)).