Transmitted light microscopy of a fibre reinforced metal

A method is presented for studying fibre damage in continuous fibre reinforced composites. It is based on contrasting the transmission of light through intact translucent fibres with the light through fractured or dead-ended fibres. The method is applied in order to detect processing-induced fibre fractures in aluminium reinforced with continuous alumina fibres

Structural phase transition in Al-Cu-Mg-Si alloys by transmission electron microscopy study on an Al-4wt% Cu-1 wt% alloy reinforced by SiC particles

The precipitation state of an Al-4 wt% Cu-1 wt% Mg-Ag alloy reinforced with SiC particles fabricated by squeeze casting is studied by transmission electron microscopy. As a consequence of an interfacial reaction the precipitation of the characteristic phases of the unreinforced alloy, Ω and S′, is suppressed and substituted by a new precipitation consisting of isolated nanoscaled rod-shaped precipitates and θ′ plates decorated with a further type of rod-shaped precipitates. These precipitates are the Q-Al5Cu2Mg8Si6 phase (hexagonal with a = 1.035 nm and c = 0.405 nm), and two other new phases also containing Al, Cu, Mg and Si, called QC (hexagonal with a = 0.670 nm) and QP (hexagonal with a = 0.393 nm). These three phases are based on the same latent lattice, the QP lattice. A phase transition model is proposed for these phases. It implies an ordering of the structures given by displacements of atoms from a lattice based on the common QP lattice. This approach is very promising for a better understanding of the precipitation in Al-Mg-Si-Cu alloys

Psychosocial correlates of estrogen and progesterone receptors in breast cancer

Acta Clinica Belgica, 1989; 44:75info:eu-repo/semantics/publishe

Water Resources in Texas: The Need for a Water Research Agenda

Center for Water and the Environmen