Paper Title:
Microstructural Characterisation of Devitrite, Na2Ca3Si6O16

On suitably heat treated samples of float glass, devitrite, Na2Ca3Si6O16, nucleates heterogeneously on the glass surface and grows as thin needles with a distinct [100] growth axis. The needles group together as spherulites and show evidence of low-angle branching in order to fill space. Analysis of the rate of needle growth along [100] between 680°C and 950°C suggests that the activation energy for diffusion governing the transport across the devitrite–glass interface is 260 kJ mol–1, somewhat higher than previous analyses have suggested. The devitrite needles are often twinned, with the twins related to one another by a Type II twinning rotation of 180° about the [100] growth axis direction. The formally irrational twin plane is very close to (010). Molecular dynamics simulations have been undertaken to establish the form of these twin interfaces to understand how and why devitrite twins in this manner.

Chapter 2: Materials Characterization
Edited by
B.S.S. Daniel and G.P. Chaudhari
Kevin M. Knowles et al., 2012, Advanced Materials Research, 585, 51
Online since
November 2012
US$ 28,-
Authors: Hiromi Miura, Tetsuo Sakai, R. Mogawa, Günter Gottstein
Authors: Ryosuke Matsumoto, Toshio Hayashida, Michihiko Nakagaki
Abstract:Fine-grained polycrystalline metals have a very high yield stress and excellent workability. Hence, numerous researchers are trying to...
Authors: Claude Esling, Yu Dong Zhang, Jacques Muller, Xiang Zhao, Liang Zuo
Abstract:In the present work, we summarize three calculation methods to determine some specific crystallographic elements based on electron...
Authors: Małgorzata Perek, Marek S. Szczerba
Abstract:In the paper the concept of structure refinement due to mechanical twinning is discussed. It is postulated that the process of structure...
Authors: Qing Yu Hou, Jing Tao Wang, Zhen Yi Huang
Chapter 1: Advanced Material Engineering and Dynamic Systems
Abstract:This paper investigated the twinning mode in a homogenized Mg-10Gd-2Y-0.5Zr ingot compressed at 300 oC and 1 s-1 using transmission electron...