Lecture: Gas Bubbles in Solids
Speaker:
Entry Fee
Members: Free
Visitors: £5.00
Date and Time
19:30 -
Location
Bath Royal Literary and Scientific Institution, 16-18 Queen Square, Bath BA1 2HN
Lecture Description
Gas bubbles tend to precipitate out of solution when the gas is insoluble in the solid matrix. In many solids the bubbles may contain gases like helium, nitrogen or oxygen and thermodynamic stability will occur when the pressure in the bubble is balanced by the capillarity of the bubble plus any external restraining stresses. The bubble size distributions may change as a result of departures from thermodynamic equilibrium by means of atomic diffusion processes. Coarsening or Ostwald Rippening of the bubble populations may occur and the nature of the bubbles may change as a result. The processes are illustrated by studies of the bubble populations occurring in irradiated uranium dioxide UO2 (nuclear fuel) where a continuous supply of gas (xenon, krypton) occurs through the fission process and three principal types of bubble occur, namely, intragranular bubbles, lenticular bubbles on the grain faces and triangulated bubbles on the junctions of three grains. These grain edge bubbles eventually link up to form continuous pathways to the surfaces of the solid and are analogous to the structures in oil-bearing rocks.
Attending via Zoom
This is a hybrid meeting: you can attend in person or join online via Zoom.
Bath Geological Society Members: Free of charge. Joining instructions and the Zoom link are sent to members by email prior to the lecture.
Visitors & Non-Members: (including members of the Geologists' Association and affiliated societies) Please book via Eventbrite to receive Zoom access (see the Entry Fee details above).
How to join: Click the Zoom link provided in your email or Eventbrite confirmation. You can join using the Zoom desktop or mobile app, or directly via your web browser without installing any software. The virtual waiting room opens approximately 15 minutes before the scheduled start time, and attendees will be admitted before the talk commences.
For any queries about joining online, please contact [email protected].