✦ LIBER ✦

The surface energy of a running crack in Al2O3, MgO and glass from crack-branching measurements

✍ Scribed by J. Congleton; N. J. Petch

Publisher: Springer Netherlands
Year: 1965
Tongue: English
Weight: 291 KB
Volume: 1
Category: Article
ISSN: 1573-2673
DOI: 10.1007/bf00184150

No coin nor oath required. For personal study only.

✦ Synopsis

The surface energy ~'r of a running crack in thin plates of A120 3, MgO and glass is deduced from the crack length at which branching occurs. If the stress on the running crack is low, the surface energy approaches the intrinsic value. But, if the stress on the running crack is raised, )'r can become a number of times greater than the intrinsic value, suggesting that plastic deformation accompanies the crack.

📜 SIMILAR VOLUMES

Surface modifications of a glass and a g

Surface modifications of a glass and a glass-ceramic of the MgO-3CaO · P2O5-SiO2 system in a simulated body fluid

✍ J.M. Oliveira; R.N. Correia; M.H. Fernandes 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 885 KB

Secondary electron yield of Au and Al2O3

Secondary electron yield of Au and Al2O3 surfaces from swift heavy ion impact in the 2.5–7.9 MeV/amu energy range

✍ D. Bisello; A. Candelori; P. Giubilato; A. Kaminsky; S. Mattiazzo; M. Nigro; D. 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 218 KB

Comparison of the spectral reflection co

Comparison of the spectral reflection coefficients of a white-surface sample made of MS-20 glass from measurements performed in the German Democratic Republic and the USSR

✍ H. König; E. I. Nikonova; G. V. Pokrovskaya; E. N. Yustova 📂 Article 📅 1976 🏛 Springer US 🌐 English ⚖ 256 KB

Oxygen interaction of CdS-based gas sens

Oxygen interaction of CdS-based gas sensors with different stoichiometric compositions was studied by X-ray photoelectron spectroscopy (XPS) and thermal-desorption mass spectroscopy observations combined with conductivity measurements. Three different types of film with different atomic ratios of Cd/S were used in the study of oxygen chemisorption in a low-temperature range between 300 and 570 K. Spray pyrolysis was used for the deposition of the films on glass substrates; XPS and energy dispersive spectroscopy of X-ray together with atomic force microscopy and scanning electron microscopy were used for the characterization of the composition and structure of the films. It was possible to distinguish different temperature ranges for the thermal desorption of the different adsorbed oxygen species. A comparison of the data from XPS and mass-spectroscopy observations with conductance measurements allows to conclude that metallic surface atoms are responsible for different interactions of oxygen species with CdS surfaces.

📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 379 KB